/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/array-sum.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 18:51:19,052 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 18:51:19,054 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 18:51:19,078 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-19 18:51:19,079 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-19 18:51:19,080 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-19 18:51:19,081 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-19 18:51:19,082 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-19 18:51:19,083 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-19 18:51:19,084 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-19 18:51:19,085 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-19 18:51:19,086 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-19 18:51:19,086 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-19 18:51:19,086 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-19 18:51:19,087 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-19 18:51:19,088 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-19 18:51:19,088 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-19 18:51:19,089 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-19 18:51:19,090 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-19 18:51:19,091 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-19 18:51:19,092 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-19 18:51:19,093 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-19 18:51:19,094 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-19 18:51:19,095 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-19 18:51:19,096 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-19 18:51:19,099 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-19 18:51:19,099 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-19 18:51:19,100 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-19 18:51:19,100 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-19 18:51:19,101 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-19 18:51:19,101 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-19 18:51:19,102 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-19 18:51:19,102 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-19 18:51:19,102 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 18:51:19,103 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 18:51:19,103 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 18:51:19,106 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-02-19 18:51:19,127 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 18:51:19,127 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 18:51:19,127 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 18:51:19,128 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 18:51:19,128 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 18:51:19,129 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 18:51:19,129 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 18:51:19,129 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 18:51:19,129 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 18:51:19,129 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 18:51:19,129 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 18:51:19,129 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 18:51:19,129 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 18:51:19,130 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 18:51:19,130 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 18:51:19,130 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 18:51:19,130 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 18:51:19,130 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 18:51:19,130 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 18:51:19,130 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 18:51:19,130 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 18:51:19,130 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 18:51:19,130 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 18:51:19,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 18:51:19,131 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 18:51:19,131 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 18:51:19,131 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 18:51:19,131 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 18:51:19,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 18:51:19,131 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 18:51:19,131 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 18:51:19,131 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 18:51:19,375 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 18:51:19,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 18:51:19,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 18:51:19,401 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 18:51:19,418 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 18:51:19,419 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/array-sum.wvr.bpl [2021-02-19 18:51:19,419 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/array-sum.wvr.bpl' [2021-02-19 18:51:19,451 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 18:51:19,454 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 18:51:19,455 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 18:51:19,456 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 18:51:19,456 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 18:51:19,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:51:19" (1/1) ... [2021-02-19 18:51:19,470 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:51:19" (1/1) ... [2021-02-19 18:51:19,475 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 18:51:19,479 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 18:51:19,479 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 18:51:19,479 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 18:51:19,485 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:51:19" (1/1) ... [2021-02-19 18:51:19,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:51:19" (1/1) ... [2021-02-19 18:51:19,486 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:51:19" (1/1) ... [2021-02-19 18:51:19,486 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:51:19" (1/1) ... [2021-02-19 18:51:19,489 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:51:19" (1/1) ... [2021-02-19 18:51:19,492 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:51:19" (1/1) ... [2021-02-19 18:51:19,492 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:51:19" (1/1) ... [2021-02-19 18:51:19,493 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 18:51:19,494 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 18:51:19,494 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 18:51:19,494 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 18:51:19,495 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:51:19" (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 [2021-02-19 18:51:19,541 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 18:51:19,541 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 18:51:19,542 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 18:51:19,542 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 18:51:19,542 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 18:51:19,542 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 18:51:19,542 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 18:51:19,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 18:51:19,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 18:51:19,542 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-02-19 18:51:19,543 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-02-19 18:51:19,543 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-02-19 18:51:19,545 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-02-19 18:51:19,742 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 18:51:19,742 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 18:51:19,743 INFO L202 PluginConnector]: Adding new model array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:51:19 BoogieIcfgContainer [2021-02-19 18:51:19,743 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 18:51:19,745 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 18:51:19,745 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 18:51:19,747 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 18:51:19,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:51:19" (1/2) ... [2021-02-19 18:51:19,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1a5ac8 and model type array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 06:51:19, skipping insertion in model container [2021-02-19 18:51:19,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:51:19" (2/2) ... [2021-02-19 18:51:19,749 INFO L111 eAbstractionObserver]: Analyzing ICFG array-sum.wvr.bpl [2021-02-19 18:51:19,753 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 18:51:19,753 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 18:51:19,755 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 18:51:19,756 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 18:51:19,819 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-02-19 18:51:19,832 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-02-19 18:51:19,855 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 18:51:19,856 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 18:51:19,856 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 18:51:19,856 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 18:51:19,856 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 18:51:19,857 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 18:51:19,857 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 18:51:19,857 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 18:51:19,872 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 32 transitions, 88 flow [2021-02-19 18:51:19,902 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 195 states, 193 states have (on average 2.8756476683937824) internal successors, (555), 194 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:19,905 INFO L276 IsEmpty]: Start isEmpty. Operand has 195 states, 193 states have (on average 2.8756476683937824) internal successors, (555), 194 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:19,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 18:51:19,917 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:19,918 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:19,918 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:19,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:19,924 INFO L82 PathProgramCache]: Analyzing trace with hash -2112338189, now seen corresponding path program 1 times [2021-02-19 18:51:19,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:19,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107308585] [2021-02-19 18:51:19,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:20,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:20,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:20,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107308585] [2021-02-19 18:51:20,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:51:20,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 18:51:20,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932860277] [2021-02-19 18:51:20,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 18:51:20,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:20,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 18:51:20,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 18:51:20,099 INFO L87 Difference]: Start difference. First operand has 195 states, 193 states have (on average 2.8756476683937824) internal successors, (555), 194 states have internal predecessors, (555), 0 states have call successors, (0), 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 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:20,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:20,135 INFO L93 Difference]: Finished difference Result 298 states and 858 transitions. [2021-02-19 18:51:20,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 18:51:20,136 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-02-19 18:51:20,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:20,148 INFO L225 Difference]: With dead ends: 298 [2021-02-19 18:51:20,148 INFO L226 Difference]: Without dead ends: 283 [2021-02-19 18:51:20,149 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 18:51:20,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-02-19 18:51:20,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 230. [2021-02-19 18:51:20,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.8820960698689957) internal successors, (660), 229 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:20,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 660 transitions. [2021-02-19 18:51:20,205 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 660 transitions. Word has length 18 [2021-02-19 18:51:20,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:20,206 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 660 transitions. [2021-02-19 18:51:20,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:20,207 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 660 transitions. [2021-02-19 18:51:20,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 18:51:20,210 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:20,210 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:20,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 18:51:20,210 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:20,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:20,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1377866598, now seen corresponding path program 1 times [2021-02-19 18:51:20,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:20,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498553721] [2021-02-19 18:51:20,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:20,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:20,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:51:20,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498553721] [2021-02-19 18:51:20,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:51:20,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:51:20,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736324477] [2021-02-19 18:51:20,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:51:20,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:20,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:51:20,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:51:20,256 INFO L87 Difference]: Start difference. First operand 230 states and 660 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:20,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:20,315 INFO L93 Difference]: Finished difference Result 249 states and 716 transitions. [2021-02-19 18:51:20,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:51:20,319 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 18:51:20,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:20,323 INFO L225 Difference]: With dead ends: 249 [2021-02-19 18:51:20,323 INFO L226 Difference]: Without dead ends: 249 [2021-02-19 18:51:20,324 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:51:20,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-02-19 18:51:20,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 224. [2021-02-19 18:51:20,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.89237668161435) internal successors, (645), 223 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:20,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 645 transitions. [2021-02-19 18:51:20,351 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 645 transitions. Word has length 21 [2021-02-19 18:51:20,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:20,351 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 645 transitions. [2021-02-19 18:51:20,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:20,351 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 645 transitions. [2021-02-19 18:51:20,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 18:51:20,353 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:20,353 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:20,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 18:51:20,353 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:20,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:20,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1682109104, now seen corresponding path program 1 times [2021-02-19 18:51:20,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:20,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363315015] [2021-02-19 18:51:20,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:20,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:20,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:51:20,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363315015] [2021-02-19 18:51:20,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:51:20,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:51:20,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384572563] [2021-02-19 18:51:20,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 18:51:20,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:20,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 18:51:20,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:51:20,405 INFO L87 Difference]: Start difference. First operand 224 states and 645 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:20,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:20,466 INFO L93 Difference]: Finished difference Result 332 states and 966 transitions. [2021-02-19 18:51:20,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:51:20,466 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 18:51:20,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:20,470 INFO L225 Difference]: With dead ends: 332 [2021-02-19 18:51:20,470 INFO L226 Difference]: Without dead ends: 332 [2021-02-19 18:51:20,471 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:51:20,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-02-19 18:51:20,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 260. [2021-02-19 18:51:20,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.9034749034749034) internal successors, (752), 259 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:20,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 752 transitions. [2021-02-19 18:51:20,496 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 752 transitions. Word has length 21 [2021-02-19 18:51:20,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:20,496 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 752 transitions. [2021-02-19 18:51:20,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:20,496 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 752 transitions. [2021-02-19 18:51:20,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:51:20,498 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:20,498 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:20,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 18:51:20,498 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:20,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:20,499 INFO L82 PathProgramCache]: Analyzing trace with hash 397652553, now seen corresponding path program 1 times [2021-02-19 18:51:20,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:20,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865094639] [2021-02-19 18:51:20,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:20,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:20,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:20,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865094639] [2021-02-19 18:51:20,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767670784] [2021-02-19 18:51:20,911 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 [2021-02-19 18:51:20,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:20,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 18:51:20,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:21,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 18:51:21,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:21,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:21,243 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-02-19 18:51:21,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:21,249 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:7 [2021-02-19 18:51:21,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:21,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:21,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-02-19 18:51:21,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834531536] [2021-02-19 18:51:21,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:51:21,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:21,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:51:21,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:51:21,287 INFO L87 Difference]: Start difference. First operand 260 states and 752 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 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) [2021-02-19 18:51:21,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:21,635 INFO L93 Difference]: Finished difference Result 426 states and 1215 transitions. [2021-02-19 18:51:21,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:51:21,635 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 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 24 [2021-02-19 18:51:21,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:21,637 INFO L225 Difference]: With dead ends: 426 [2021-02-19 18:51:21,638 INFO L226 Difference]: Without dead ends: 411 [2021-02-19 18:51:21,638 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:51:21,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-02-19 18:51:21,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 346. [2021-02-19 18:51:21,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.8956521739130436) internal successors, (999), 345 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:21,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 999 transitions. [2021-02-19 18:51:21,648 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 999 transitions. Word has length 24 [2021-02-19 18:51:21,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:21,648 INFO L480 AbstractCegarLoop]: Abstraction has 346 states and 999 transitions. [2021-02-19 18:51:21,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 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) [2021-02-19 18:51:21,648 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 999 transitions. [2021-02-19 18:51:21,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:51:21,650 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:21,650 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:21,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:21,868 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:21,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:21,868 INFO L82 PathProgramCache]: Analyzing trace with hash -184286169, now seen corresponding path program 2 times [2021-02-19 18:51:21,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:21,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532776090] [2021-02-19 18:51:21,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:21,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:22,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:22,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532776090] [2021-02-19 18:51:22,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316589103] [2021-02-19 18:51:22,159 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 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 [2021-02-19 18:51:22,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:51:22,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:22,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 18:51:22,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:22,350 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:22,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 60 [2021-02-19 18:51:22,374 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:51:22,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:22,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 18:51:22,389 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:51:22,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:22,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:51:22,415 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:21 [2021-02-19 18:51:22,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:22,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:22,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 18:51:22,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538539386] [2021-02-19 18:51:22,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 18:51:22,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:22,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 18:51:22,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:51:22,469 INFO L87 Difference]: Start difference. First operand 346 states and 999 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:23,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:23,251 INFO L93 Difference]: Finished difference Result 661 states and 1886 transitions. [2021-02-19 18:51:23,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 18:51:23,252 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 18:51:23,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:23,255 INFO L225 Difference]: With dead ends: 661 [2021-02-19 18:51:23,255 INFO L226 Difference]: Without dead ends: 631 [2021-02-19 18:51:23,256 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:51:23,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-02-19 18:51:23,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 362. [2021-02-19 18:51:23,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.9224376731301938) internal successors, (1055), 361 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:23,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1055 transitions. [2021-02-19 18:51:23,269 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1055 transitions. Word has length 24 [2021-02-19 18:51:23,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:23,270 INFO L480 AbstractCegarLoop]: Abstraction has 362 states and 1055 transitions. [2021-02-19 18:51:23,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:23,270 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1055 transitions. [2021-02-19 18:51:23,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:51:23,271 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:23,271 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:23,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:23,484 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:23,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:23,484 INFO L82 PathProgramCache]: Analyzing trace with hash -57464841, now seen corresponding path program 3 times [2021-02-19 18:51:23,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:23,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453587017] [2021-02-19 18:51:23,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:23,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:23,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:23,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453587017] [2021-02-19 18:51:23,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862259282] [2021-02-19 18:51:23,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 18:51:23,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 18:51:23,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:23,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 18:51:23,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:23,849 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:23,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 58 [2021-02-19 18:51:23,864 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:51:23,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:23,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 18:51:23,880 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:51:23,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:23,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:23,891 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:62, output treesize:26 [2021-02-19 18:51:23,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:23,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:23,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 14 [2021-02-19 18:51:23,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607511585] [2021-02-19 18:51:23,944 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:51:23,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:23,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:51:23,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:51:23,944 INFO L87 Difference]: Start difference. First operand 362 states and 1055 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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) [2021-02-19 18:51:24,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:24,707 INFO L93 Difference]: Finished difference Result 732 states and 2129 transitions. [2021-02-19 18:51:24,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 18:51:24,708 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 18:51:24,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:24,711 INFO L225 Difference]: With dead ends: 732 [2021-02-19 18:51:24,711 INFO L226 Difference]: Without dead ends: 717 [2021-02-19 18:51:24,712 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=218, Invalid=652, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:51:24,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-02-19 18:51:24,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 366. [2021-02-19 18:51:24,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.9342465753424656) internal successors, (1071), 365 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:24,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1071 transitions. [2021-02-19 18:51:24,721 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1071 transitions. Word has length 24 [2021-02-19 18:51:24,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:24,722 INFO L480 AbstractCegarLoop]: Abstraction has 366 states and 1071 transitions. [2021-02-19 18:51:24,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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) [2021-02-19 18:51:24,723 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1071 transitions. [2021-02-19 18:51:24,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:51:24,723 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:24,724 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:24,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-02-19 18:51:24,939 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:24,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:24,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1226467769, now seen corresponding path program 4 times [2021-02-19 18:51:24,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:24,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296061944] [2021-02-19 18:51:24,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:24,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:25,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:25,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296061944] [2021-02-19 18:51:25,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901680431] [2021-02-19 18:51:25,119 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:25,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:51:25,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:25,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 18:51:25,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:25,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 18:51:25,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:25,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:25,245 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-02-19 18:51:25,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:25,249 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:3 [2021-02-19 18:51:25,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:25,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:25,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-02-19 18:51:25,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316131625] [2021-02-19 18:51:25,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 18:51:25,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:25,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 18:51:25,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:51:25,278 INFO L87 Difference]: Start difference. First operand 366 states and 1071 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-02-19 18:51:25,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:25,472 INFO L93 Difference]: Finished difference Result 558 states and 1607 transitions. [2021-02-19 18:51:25,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 18:51:25,472 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 24 [2021-02-19 18:51:25,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:25,478 INFO L225 Difference]: With dead ends: 558 [2021-02-19 18:51:25,478 INFO L226 Difference]: Without dead ends: 543 [2021-02-19 18:51:25,479 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:51:25,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-02-19 18:51:25,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 382. [2021-02-19 18:51:25,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 2.916010498687664) internal successors, (1111), 381 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:25,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1111 transitions. [2021-02-19 18:51:25,487 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1111 transitions. Word has length 24 [2021-02-19 18:51:25,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:25,488 INFO L480 AbstractCegarLoop]: Abstraction has 382 states and 1111 transitions. [2021-02-19 18:51:25,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-02-19 18:51:25,488 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1111 transitions. [2021-02-19 18:51:25,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 18:51:25,489 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:25,489 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:25,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:25,704 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:25,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:25,705 INFO L82 PathProgramCache]: Analyzing trace with hash 572535559, now seen corresponding path program 5 times [2021-02-19 18:51:25,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:25,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810185534] [2021-02-19 18:51:25,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:25,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:25,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:25,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810185534] [2021-02-19 18:51:25,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011588626] [2021-02-19 18:51:25,911 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:25,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:51:25,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:25,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 18:51:25,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:26,039 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:26,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2021-02-19 18:51:26,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:51:26,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:26,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 18:51:26,052 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:51:26,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:26,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:26,073 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:30, output treesize:28 [2021-02-19 18:51:26,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:26,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:26,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-02-19 18:51:26,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481455612] [2021-02-19 18:51:26,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:51:26,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:26,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:51:26,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:51:26,156 INFO L87 Difference]: Start difference. First operand 382 states and 1111 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 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) [2021-02-19 18:51:26,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:26,583 INFO L93 Difference]: Finished difference Result 692 states and 2022 transitions. [2021-02-19 18:51:26,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 18:51:26,583 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 18:51:26,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:26,586 INFO L225 Difference]: With dead ends: 692 [2021-02-19 18:51:26,586 INFO L226 Difference]: Without dead ends: 677 [2021-02-19 18:51:26,586 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:51:26,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-02-19 18:51:26,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 390. [2021-02-19 18:51:26,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.9383033419023135) internal successors, (1143), 389 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:26,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1143 transitions. [2021-02-19 18:51:26,596 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1143 transitions. Word has length 24 [2021-02-19 18:51:26,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:26,597 INFO L480 AbstractCegarLoop]: Abstraction has 390 states and 1143 transitions. [2021-02-19 18:51:26,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 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) [2021-02-19 18:51:26,597 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1143 transitions. [2021-02-19 18:51:26,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:26,599 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:26,599 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:26,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-02-19 18:51:26,814 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:26,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:26,815 INFO L82 PathProgramCache]: Analyzing trace with hash -954973550, now seen corresponding path program 6 times [2021-02-19 18:51:26,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:26,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579867974] [2021-02-19 18:51:26,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:26,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:26,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:26,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579867974] [2021-02-19 18:51:26,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508659408] [2021-02-19 18:51:26,867 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:51:26,897 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:51:26,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:26,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:26,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:26,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:26,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:26,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 18:51:26,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801529681] [2021-02-19 18:51:26,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 18:51:26,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:26,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 18:51:26,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:51:26,975 INFO L87 Difference]: Start difference. First operand 390 states and 1143 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 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) [2021-02-19 18:51:27,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:27,352 INFO L93 Difference]: Finished difference Result 1186 states and 3456 transitions. [2021-02-19 18:51:27,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 18:51:27,352 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 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 27 [2021-02-19 18:51:27,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:27,356 INFO L225 Difference]: With dead ends: 1186 [2021-02-19 18:51:27,356 INFO L226 Difference]: Without dead ends: 1186 [2021-02-19 18:51:27,357 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-02-19 18:51:27,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2021-02-19 18:51:27,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 509. [2021-02-19 18:51:27,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 3.0688976377952755) internal successors, (1559), 508 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:27,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1559 transitions. [2021-02-19 18:51:27,369 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1559 transitions. Word has length 27 [2021-02-19 18:51:27,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:27,370 INFO L480 AbstractCegarLoop]: Abstraction has 509 states and 1559 transitions. [2021-02-19 18:51:27,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 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) [2021-02-19 18:51:27,370 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1559 transitions. [2021-02-19 18:51:27,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:27,371 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:27,371 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:27,587 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-02-19 18:51:27,587 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:27,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:27,588 INFO L82 PathProgramCache]: Analyzing trace with hash -466452862, now seen corresponding path program 7 times [2021-02-19 18:51:27,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:27,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637192602] [2021-02-19 18:51:27,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:27,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:27,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:27,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637192602] [2021-02-19 18:51:27,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428594939] [2021-02-19 18:51:27,628 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 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 [2021-02-19 18:51:27,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:27,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:27,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:27,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:27,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:27,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 18:51:27,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075014999] [2021-02-19 18:51:27,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 18:51:27,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:27,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 18:51:27,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:51:27,743 INFO L87 Difference]: Start difference. First operand 509 states and 1559 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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) [2021-02-19 18:51:28,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:28,564 INFO L93 Difference]: Finished difference Result 2025 states and 5753 transitions. [2021-02-19 18:51:28,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-02-19 18:51:28,564 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:51:28,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:28,571 INFO L225 Difference]: With dead ends: 2025 [2021-02-19 18:51:28,571 INFO L226 Difference]: Without dead ends: 2025 [2021-02-19 18:51:28,572 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 18:51:28,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2025 states. [2021-02-19 18:51:28,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2025 to 515. [2021-02-19 18:51:28,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.0914396887159534) internal successors, (1589), 514 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:28,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1589 transitions. [2021-02-19 18:51:28,589 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1589 transitions. Word has length 27 [2021-02-19 18:51:28,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:28,590 INFO L480 AbstractCegarLoop]: Abstraction has 515 states and 1589 transitions. [2021-02-19 18:51:28,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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) [2021-02-19 18:51:28,590 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1589 transitions. [2021-02-19 18:51:28,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:28,591 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:28,591 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:28,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:28,810 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:28,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:28,810 INFO L82 PathProgramCache]: Analyzing trace with hash -660353530, now seen corresponding path program 8 times [2021-02-19 18:51:28,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:28,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554625452] [2021-02-19 18:51:28,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:28,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:28,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:28,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554625452] [2021-02-19 18:51:28,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808538564] [2021-02-19 18:51:28,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:28,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:51:28,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:28,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:28,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:28,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:28,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:28,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 18:51:28,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579937289] [2021-02-19 18:51:28,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 18:51:28,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:28,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 18:51:28,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:51:28,997 INFO L87 Difference]: Start difference. First operand 515 states and 1589 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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) [2021-02-19 18:51:29,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:29,676 INFO L93 Difference]: Finished difference Result 1842 states and 5297 transitions. [2021-02-19 18:51:29,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 18:51:29,677 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:51:29,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:29,683 INFO L225 Difference]: With dead ends: 1842 [2021-02-19 18:51:29,683 INFO L226 Difference]: Without dead ends: 1842 [2021-02-19 18:51:29,684 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 18:51:29,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1842 states. [2021-02-19 18:51:29,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1842 to 505. [2021-02-19 18:51:29,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 3.0734126984126986) internal successors, (1549), 504 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:29,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1549 transitions. [2021-02-19 18:51:29,700 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1549 transitions. Word has length 27 [2021-02-19 18:51:29,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:29,700 INFO L480 AbstractCegarLoop]: Abstraction has 505 states and 1549 transitions. [2021-02-19 18:51:29,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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) [2021-02-19 18:51:29,700 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1549 transitions. [2021-02-19 18:51:29,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:29,701 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:29,701 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:29,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:29,914 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:29,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:29,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1446478511, now seen corresponding path program 1 times [2021-02-19 18:51:29,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:29,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399508095] [2021-02-19 18:51:29,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:29,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:29,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:51:29,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399508095] [2021-02-19 18:51:29,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192218893] [2021-02-19 18:51:29,945 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2021-02-19 18:51:29,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:29,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 18:51:29,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:30,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:51:30,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:30,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-02-19 18:51:30,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784001656] [2021-02-19 18:51:30,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 18:51:30,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:30,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 18:51:30,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:51:30,022 INFO L87 Difference]: Start difference. First operand 505 states and 1549 transitions. Second operand has 8 states, 8 states have (on average 4.5) 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) [2021-02-19 18:51:30,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:30,132 INFO L93 Difference]: Finished difference Result 1215 states and 3591 transitions. [2021-02-19 18:51:30,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:51:30,132 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) 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 27 [2021-02-19 18:51:30,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:30,136 INFO L225 Difference]: With dead ends: 1215 [2021-02-19 18:51:30,136 INFO L226 Difference]: Without dead ends: 1209 [2021-02-19 18:51:30,137 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:51:30,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2021-02-19 18:51:30,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 784. [2021-02-19 18:51:30,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 3.177522349936143) internal successors, (2488), 783 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:30,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 2488 transitions. [2021-02-19 18:51:30,155 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 2488 transitions. Word has length 27 [2021-02-19 18:51:30,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:30,156 INFO L480 AbstractCegarLoop]: Abstraction has 784 states and 2488 transitions. [2021-02-19 18:51:30,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) 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) [2021-02-19 18:51:30,156 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 2488 transitions. [2021-02-19 18:51:30,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:30,157 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:30,157 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:30,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:30,373 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:30,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:30,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1928537542, now seen corresponding path program 9 times [2021-02-19 18:51:30,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:30,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889284791] [2021-02-19 18:51:30,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:30,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:30,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:30,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889284791] [2021-02-19 18:51:30,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636995189] [2021-02-19 18:51:30,422 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 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 [2021-02-19 18:51:30,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:51:30,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:30,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:30,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:30,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:30,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:30,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-02-19 18:51:30,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593307848] [2021-02-19 18:51:30,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 18:51:30,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:30,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 18:51:30,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:51:30,524 INFO L87 Difference]: Start difference. First operand 784 states and 2488 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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) [2021-02-19 18:51:30,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:30,689 INFO L93 Difference]: Finished difference Result 1375 states and 4197 transitions. [2021-02-19 18:51:30,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 18:51:30,689 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:51:30,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:30,694 INFO L225 Difference]: With dead ends: 1375 [2021-02-19 18:51:30,694 INFO L226 Difference]: Without dead ends: 1327 [2021-02-19 18:51:30,694 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:51:30,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2021-02-19 18:51:30,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 987. [2021-02-19 18:51:30,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 987 states, 986 states have (on average 3.186612576064909) internal successors, (3142), 986 states have internal predecessors, (3142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:30,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 3142 transitions. [2021-02-19 18:51:30,712 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 3142 transitions. Word has length 27 [2021-02-19 18:51:30,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:30,712 INFO L480 AbstractCegarLoop]: Abstraction has 987 states and 3142 transitions. [2021-02-19 18:51:30,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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) [2021-02-19 18:51:30,712 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 3142 transitions. [2021-02-19 18:51:30,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:30,714 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:30,714 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:30,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:30,931 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:30,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:30,932 INFO L82 PathProgramCache]: Analyzing trace with hash 570714739, now seen corresponding path program 2 times [2021-02-19 18:51:30,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:30,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047041834] [2021-02-19 18:51:30,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:30,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:30,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:51:30,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047041834] [2021-02-19 18:51:30,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460134049] [2021-02-19 18:51:30,957 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 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 [2021-02-19 18:51:30,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:51:30,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:30,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 18:51:30,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:31,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:51:31,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:31,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-02-19 18:51:31,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850477135] [2021-02-19 18:51:31,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 18:51:31,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:31,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 18:51:31,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:51:31,029 INFO L87 Difference]: Start difference. First operand 987 states and 3142 transitions. Second operand has 8 states, 8 states have (on average 4.5) 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) [2021-02-19 18:51:31,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:31,121 INFO L93 Difference]: Finished difference Result 1478 states and 4418 transitions. [2021-02-19 18:51:31,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:51:31,122 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) 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 27 [2021-02-19 18:51:31,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:31,126 INFO L225 Difference]: With dead ends: 1478 [2021-02-19 18:51:31,127 INFO L226 Difference]: Without dead ends: 1478 [2021-02-19 18:51:31,127 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:51:31,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2021-02-19 18:51:31,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1006. [2021-02-19 18:51:31,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 3.1502487562189057) internal successors, (3166), 1005 states have internal predecessors, (3166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:31,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 3166 transitions. [2021-02-19 18:51:31,145 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 3166 transitions. Word has length 27 [2021-02-19 18:51:31,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:31,146 INFO L480 AbstractCegarLoop]: Abstraction has 1006 states and 3166 transitions. [2021-02-19 18:51:31,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) 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) [2021-02-19 18:51:31,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 3166 transitions. [2021-02-19 18:51:31,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:31,147 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:31,147 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:31,362 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-02-19 18:51:31,362 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:31,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:31,362 INFO L82 PathProgramCache]: Analyzing trace with hash 733023956, now seen corresponding path program 10 times [2021-02-19 18:51:31,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:31,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598060038] [2021-02-19 18:51:31,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:31,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:31,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598060038] [2021-02-19 18:51:31,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096653741] [2021-02-19 18:51:31,395 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) [2021-02-19 18:51:31,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:51:31,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:31,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:31,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:31,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:31,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:31,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 18:51:31,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383933145] [2021-02-19 18:51:31,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:51:31,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:31,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:51:31,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:51:31,493 INFO L87 Difference]: Start difference. First operand 1006 states and 3166 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-02-19 18:51:31,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:31,780 INFO L93 Difference]: Finished difference Result 2277 states and 6674 transitions. [2021-02-19 18:51:31,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 18:51:31,780 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 27 [2021-02-19 18:51:31,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:31,787 INFO L225 Difference]: With dead ends: 2277 [2021-02-19 18:51:31,788 INFO L226 Difference]: Without dead ends: 2277 [2021-02-19 18:51:31,788 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:51:31,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2021-02-19 18:51:31,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 1022. [2021-02-19 18:51:31,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 3.147894221351616) internal successors, (3214), 1021 states have internal predecessors, (3214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:31,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3214 transitions. [2021-02-19 18:51:31,811 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3214 transitions. Word has length 27 [2021-02-19 18:51:31,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:31,812 INFO L480 AbstractCegarLoop]: Abstraction has 1022 states and 3214 transitions. [2021-02-19 18:51:31,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-02-19 18:51:31,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3214 transitions. [2021-02-19 18:51:31,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:31,813 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:31,813 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:32,026 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-02-19 18:51:32,026 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:32,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:32,026 INFO L82 PathProgramCache]: Analyzing trace with hash 645299584, now seen corresponding path program 11 times [2021-02-19 18:51:32,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:32,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677624537] [2021-02-19 18:51:32,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:32,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:32,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:32,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677624537] [2021-02-19 18:51:32,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970207896] [2021-02-19 18:51:32,066 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 [2021-02-19 18:51:32,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:51:32,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:32,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:32,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:32,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:32,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:32,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 18:51:32,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544862178] [2021-02-19 18:51:32,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:51:32,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:32,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:51:32,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:51:32,172 INFO L87 Difference]: Start difference. First operand 1022 states and 3214 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-02-19 18:51:32,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:32,628 INFO L93 Difference]: Finished difference Result 2725 states and 7832 transitions. [2021-02-19 18:51:32,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-02-19 18:51:32,629 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 27 [2021-02-19 18:51:32,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:32,637 INFO L225 Difference]: With dead ends: 2725 [2021-02-19 18:51:32,637 INFO L226 Difference]: Without dead ends: 2725 [2021-02-19 18:51:32,637 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 18:51:32,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2021-02-19 18:51:32,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 1096. [2021-02-19 18:51:32,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1095 states have (on average 3.1406392694063925) internal successors, (3439), 1095 states have internal predecessors, (3439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:32,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 3439 transitions. [2021-02-19 18:51:32,664 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 3439 transitions. Word has length 27 [2021-02-19 18:51:32,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:32,664 INFO L480 AbstractCegarLoop]: Abstraction has 1096 states and 3439 transitions. [2021-02-19 18:51:32,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-02-19 18:51:32,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 3439 transitions. [2021-02-19 18:51:32,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:32,666 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:32,666 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:32,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-02-19 18:51:32,881 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:32,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:32,881 INFO L82 PathProgramCache]: Analyzing trace with hash 317969308, now seen corresponding path program 12 times [2021-02-19 18:51:32,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:32,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128747056] [2021-02-19 18:51:32,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:32,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:32,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:32,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128747056] [2021-02-19 18:51:32,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098452416] [2021-02-19 18:51:32,917 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 [2021-02-19 18:51:32,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 18:51:32,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:32,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:32,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:33,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:33,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:33,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-02-19 18:51:33,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382814636] [2021-02-19 18:51:33,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 18:51:33,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:33,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 18:51:33,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:51:33,032 INFO L87 Difference]: Start difference. First operand 1096 states and 3439 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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) [2021-02-19 18:51:33,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:33,272 INFO L93 Difference]: Finished difference Result 2457 states and 7416 transitions. [2021-02-19 18:51:33,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 18:51:33,272 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:51:33,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:33,277 INFO L225 Difference]: With dead ends: 2457 [2021-02-19 18:51:33,277 INFO L226 Difference]: Without dead ends: 2447 [2021-02-19 18:51:33,278 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:51:33,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2021-02-19 18:51:33,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 1570. [2021-02-19 18:51:33,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1569 states have (on average 3.1963033779477374) internal successors, (5015), 1569 states have internal predecessors, (5015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:33,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 5015 transitions. [2021-02-19 18:51:33,322 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 5015 transitions. Word has length 27 [2021-02-19 18:51:33,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:33,322 INFO L480 AbstractCegarLoop]: Abstraction has 1570 states and 5015 transitions. [2021-02-19 18:51:33,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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) [2021-02-19 18:51:33,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 5015 transitions. [2021-02-19 18:51:33,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:33,325 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:33,325 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:33,538 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:33,538 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:33,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:33,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1267266998, now seen corresponding path program 13 times [2021-02-19 18:51:33,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:33,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488900792] [2021-02-19 18:51:33,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:33,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:33,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:33,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488900792] [2021-02-19 18:51:33,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950760698] [2021-02-19 18:51:33,571 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 [2021-02-19 18:51:33,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:33,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:33,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:33,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:33,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:33,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-02-19 18:51:33,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232038220] [2021-02-19 18:51:33,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 18:51:33,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:33,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 18:51:33,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:51:33,674 INFO L87 Difference]: Start difference. First operand 1570 states and 5015 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 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) [2021-02-19 18:51:33,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:33,966 INFO L93 Difference]: Finished difference Result 2556 states and 7763 transitions. [2021-02-19 18:51:33,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 18:51:33,966 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 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 27 [2021-02-19 18:51:33,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:33,972 INFO L225 Difference]: With dead ends: 2556 [2021-02-19 18:51:33,973 INFO L226 Difference]: Without dead ends: 2556 [2021-02-19 18:51:33,973 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:51:33,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-02-19 18:51:33,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 1576. [2021-02-19 18:51:33,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 3.1885714285714286) internal successors, (5022), 1575 states have internal predecessors, (5022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:34,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 5022 transitions. [2021-02-19 18:51:34,001 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 5022 transitions. Word has length 27 [2021-02-19 18:51:34,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:34,001 INFO L480 AbstractCegarLoop]: Abstraction has 1576 states and 5022 transitions. [2021-02-19 18:51:34,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 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) [2021-02-19 18:51:34,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 5022 transitions. [2021-02-19 18:51:34,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:34,004 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:34,004 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:34,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-02-19 18:51:34,218 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:34,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:34,218 INFO L82 PathProgramCache]: Analyzing trace with hash -904631356, now seen corresponding path program 14 times [2021-02-19 18:51:34,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:34,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409676526] [2021-02-19 18:51:34,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:34,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:34,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:34,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409676526] [2021-02-19 18:51:34,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105483571] [2021-02-19 18:51:34,247 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 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 [2021-02-19 18:51:34,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:51:34,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:34,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:34,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:34,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:34,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:34,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 18:51:34,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220453166] [2021-02-19 18:51:34,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:51:34,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:34,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:51:34,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:51:34,329 INFO L87 Difference]: Start difference. First operand 1576 states and 5022 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-02-19 18:51:34,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:34,758 INFO L93 Difference]: Finished difference Result 3074 states and 9276 transitions. [2021-02-19 18:51:34,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 18:51:34,759 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 27 [2021-02-19 18:51:34,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:34,765 INFO L225 Difference]: With dead ends: 3074 [2021-02-19 18:51:34,766 INFO L226 Difference]: Without dead ends: 3070 [2021-02-19 18:51:34,766 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:51:34,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3070 states. [2021-02-19 18:51:34,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3070 to 1588. [2021-02-19 18:51:34,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1588 states, 1587 states have (on average 3.178323881537492) internal successors, (5044), 1587 states have internal predecessors, (5044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:34,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 5044 transitions. [2021-02-19 18:51:34,802 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 5044 transitions. Word has length 27 [2021-02-19 18:51:34,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:34,802 INFO L480 AbstractCegarLoop]: Abstraction has 1588 states and 5044 transitions. [2021-02-19 18:51:34,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-02-19 18:51:34,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 5044 transitions. [2021-02-19 18:51:34,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:34,805 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:34,805 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:35,018 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-02-19 18:51:35,018 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:35,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:35,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1160574596, now seen corresponding path program 15 times [2021-02-19 18:51:35,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:35,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150339765] [2021-02-19 18:51:35,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:35,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:35,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:35,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150339765] [2021-02-19 18:51:35,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363845084] [2021-02-19 18:51:35,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 18:51:35,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:51:35,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:35,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:35,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:35,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:35,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:35,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 18:51:35,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366206686] [2021-02-19 18:51:35,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 18:51:35,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:35,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 18:51:35,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:51:35,170 INFO L87 Difference]: Start difference. First operand 1588 states and 5044 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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) [2021-02-19 18:51:35,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:35,933 INFO L93 Difference]: Finished difference Result 5541 states and 16712 transitions. [2021-02-19 18:51:35,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-02-19 18:51:35,934 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:51:35,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:35,942 INFO L225 Difference]: With dead ends: 5541 [2021-02-19 18:51:35,942 INFO L226 Difference]: Without dead ends: 5541 [2021-02-19 18:51:35,943 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 18:51:35,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5541 states. [2021-02-19 18:51:35,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5541 to 1799. [2021-02-19 18:51:35,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1799 states, 1798 states have (on average 3.274193548387097) internal successors, (5887), 1798 states have internal predecessors, (5887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:35,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1799 states to 1799 states and 5887 transitions. [2021-02-19 18:51:35,987 INFO L78 Accepts]: Start accepts. Automaton has 1799 states and 5887 transitions. Word has length 27 [2021-02-19 18:51:35,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:35,987 INFO L480 AbstractCegarLoop]: Abstraction has 1799 states and 5887 transitions. [2021-02-19 18:51:35,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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) [2021-02-19 18:51:35,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1799 states and 5887 transitions. [2021-02-19 18:51:35,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:35,989 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:35,989 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:36,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-02-19 18:51:36,205 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:36,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:36,205 INFO L82 PathProgramCache]: Analyzing trace with hash 966673928, now seen corresponding path program 16 times [2021-02-19 18:51:36,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:36,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849376288] [2021-02-19 18:51:36,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:36,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:36,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:36,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849376288] [2021-02-19 18:51:36,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775033410] [2021-02-19 18:51:36,239 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 [2021-02-19 18:51:36,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:51:36,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:36,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:36,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:36,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:36,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:36,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 18:51:36,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722062668] [2021-02-19 18:51:36,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 18:51:36,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:36,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 18:51:36,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:51:36,346 INFO L87 Difference]: Start difference. First operand 1799 states and 5887 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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) [2021-02-19 18:51:37,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:37,068 INFO L93 Difference]: Finished difference Result 5525 states and 16688 transitions. [2021-02-19 18:51:37,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-02-19 18:51:37,069 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:51:37,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:37,078 INFO L225 Difference]: With dead ends: 5525 [2021-02-19 18:51:37,078 INFO L226 Difference]: Without dead ends: 5525 [2021-02-19 18:51:37,079 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 18:51:37,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5525 states. [2021-02-19 18:51:37,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5525 to 1784. [2021-02-19 18:51:37,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 3.259113853056646) internal successors, (5811), 1783 states have internal predecessors, (5811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:37,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 5811 transitions. [2021-02-19 18:51:37,121 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 5811 transitions. Word has length 27 [2021-02-19 18:51:37,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:37,121 INFO L480 AbstractCegarLoop]: Abstraction has 1784 states and 5811 transitions. [2021-02-19 18:51:37,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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) [2021-02-19 18:51:37,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 5811 transitions. [2021-02-19 18:51:37,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:37,124 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:37,124 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:37,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:37,325 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:37,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:37,325 INFO L82 PathProgramCache]: Analyzing trace with hash 594764162, now seen corresponding path program 17 times [2021-02-19 18:51:37,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:37,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418179517] [2021-02-19 18:51:37,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:37,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:37,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:37,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418179517] [2021-02-19 18:51:37,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362588903] [2021-02-19 18:51:37,356 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 [2021-02-19 18:51:37,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:51:37,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:37,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:37,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:37,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:37,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:37,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 18:51:37,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462867335] [2021-02-19 18:51:37,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 18:51:37,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:37,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 18:51:37,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:51:37,462 INFO L87 Difference]: Start difference. First operand 1784 states and 5811 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:38,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:38,148 INFO L93 Difference]: Finished difference Result 5112 states and 15104 transitions. [2021-02-19 18:51:38,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-02-19 18:51:38,149 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:51:38,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:38,158 INFO L225 Difference]: With dead ends: 5112 [2021-02-19 18:51:38,158 INFO L226 Difference]: Without dead ends: 5112 [2021-02-19 18:51:38,158 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 18:51:38,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5112 states. [2021-02-19 18:51:38,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5112 to 1804. [2021-02-19 18:51:38,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1803 states have (on average 3.265113699389906) internal successors, (5887), 1803 states have internal predecessors, (5887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:38,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 5887 transitions. [2021-02-19 18:51:38,217 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 5887 transitions. Word has length 27 [2021-02-19 18:51:38,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:38,217 INFO L480 AbstractCegarLoop]: Abstraction has 1804 states and 5887 transitions. [2021-02-19 18:51:38,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:38,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 5887 transitions. [2021-02-19 18:51:38,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:38,221 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:38,221 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:38,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:38,434 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:38,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:38,434 INFO L82 PathProgramCache]: Analyzing trace with hash 405545864, now seen corresponding path program 18 times [2021-02-19 18:51:38,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:38,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116991797] [2021-02-19 18:51:38,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:38,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:38,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:38,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116991797] [2021-02-19 18:51:38,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520261797] [2021-02-19 18:51:38,466 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 [2021-02-19 18:51:38,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:51:38,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:38,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:38,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:38,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:38,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:38,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 18:51:38,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757283753] [2021-02-19 18:51:38,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 18:51:38,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:38,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 18:51:38,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:51:38,551 INFO L87 Difference]: Start difference. First operand 1804 states and 5887 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:39,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:39,142 INFO L93 Difference]: Finished difference Result 4837 states and 14460 transitions. [2021-02-19 18:51:39,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 18:51:39,142 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:51:39,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:39,150 INFO L225 Difference]: With dead ends: 4837 [2021-02-19 18:51:39,150 INFO L226 Difference]: Without dead ends: 4833 [2021-02-19 18:51:39,150 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 18:51:39,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4833 states. [2021-02-19 18:51:39,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4833 to 1804. [2021-02-19 18:51:39,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1803 states have (on average 3.2640044370493624) internal successors, (5885), 1803 states have internal predecessors, (5885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:39,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 5885 transitions. [2021-02-19 18:51:39,195 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 5885 transitions. Word has length 27 [2021-02-19 18:51:39,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:39,195 INFO L480 AbstractCegarLoop]: Abstraction has 1804 states and 5885 transitions. [2021-02-19 18:51:39,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:39,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 5885 transitions. [2021-02-19 18:51:39,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:39,198 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:39,198 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:39,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-02-19 18:51:39,414 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:39,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:39,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1795067080, now seen corresponding path program 19 times [2021-02-19 18:51:39,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:39,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399171468] [2021-02-19 18:51:39,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:39,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:39,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:39,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399171468] [2021-02-19 18:51:39,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975880529] [2021-02-19 18:51:39,447 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 [2021-02-19 18:51:39,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:39,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:39,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:39,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:39,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:39,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 18:51:39,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272353689] [2021-02-19 18:51:39,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 18:51:39,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:39,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 18:51:39,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:51:39,575 INFO L87 Difference]: Start difference. First operand 1804 states and 5885 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2021-02-19 18:51:40,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:40,315 INFO L93 Difference]: Finished difference Result 4879 states and 14554 transitions. [2021-02-19 18:51:40,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-02-19 18:51:40,315 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 27 [2021-02-19 18:51:40,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:40,321 INFO L225 Difference]: With dead ends: 4879 [2021-02-19 18:51:40,321 INFO L226 Difference]: Without dead ends: 4879 [2021-02-19 18:51:40,322 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 18:51:40,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4879 states. [2021-02-19 18:51:40,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4879 to 1814. [2021-02-19 18:51:40,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 3.2675124103695534) internal successors, (5924), 1813 states have internal predecessors, (5924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:40,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 5924 transitions. [2021-02-19 18:51:40,361 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 5924 transitions. Word has length 27 [2021-02-19 18:51:40,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:40,361 INFO L480 AbstractCegarLoop]: Abstraction has 1814 states and 5924 transitions. [2021-02-19 18:51:40,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2021-02-19 18:51:40,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 5924 transitions. [2021-02-19 18:51:40,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:40,363 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:40,363 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:40,577 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-02-19 18:51:40,578 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:40,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:40,578 INFO L82 PathProgramCache]: Analyzing trace with hash -717250746, now seen corresponding path program 20 times [2021-02-19 18:51:40,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:40,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187974115] [2021-02-19 18:51:40,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:40,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:40,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:40,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187974115] [2021-02-19 18:51:40,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327405589] [2021-02-19 18:51:40,610 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 [2021-02-19 18:51:40,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:51:40,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:40,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:40,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:40,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:40,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:40,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 18:51:40,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506710562] [2021-02-19 18:51:40,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 18:51:40,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:40,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 18:51:40,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:51:40,712 INFO L87 Difference]: Start difference. First operand 1814 states and 5924 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2021-02-19 18:51:41,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:41,361 INFO L93 Difference]: Finished difference Result 4586 states and 13852 transitions. [2021-02-19 18:51:41,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 18:51:41,362 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 27 [2021-02-19 18:51:41,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:41,368 INFO L225 Difference]: With dead ends: 4586 [2021-02-19 18:51:41,368 INFO L226 Difference]: Without dead ends: 4582 [2021-02-19 18:51:41,369 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 18:51:41,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4582 states. [2021-02-19 18:51:41,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4582 to 1814. [2021-02-19 18:51:41,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 3.2664092664092665) internal successors, (5922), 1813 states have internal predecessors, (5922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:41,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 5922 transitions. [2021-02-19 18:51:41,409 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 5922 transitions. Word has length 27 [2021-02-19 18:51:41,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:41,409 INFO L480 AbstractCegarLoop]: Abstraction has 1814 states and 5922 transitions. [2021-02-19 18:51:41,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2021-02-19 18:51:41,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 5922 transitions. [2021-02-19 18:51:41,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:41,412 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:41,412 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:41,626 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:41,626 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:41,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:41,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1779667311, now seen corresponding path program 3 times [2021-02-19 18:51:41,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:41,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204042502] [2021-02-19 18:51:41,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:41,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:41,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:51:41,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204042502] [2021-02-19 18:51:41,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246609992] [2021-02-19 18:51:41,654 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 [2021-02-19 18:51:41,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 18:51:41,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:41,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 18:51:41,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:41,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:51:41,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:41,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-02-19 18:51:41,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774288321] [2021-02-19 18:51:41,721 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 18:51:41,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:41,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 18:51:41,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:51:41,721 INFO L87 Difference]: Start difference. First operand 1814 states and 5922 transitions. Second operand has 8 states, 8 states have (on average 4.5) 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) [2021-02-19 18:51:41,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:41,810 INFO L93 Difference]: Finished difference Result 1973 states and 6380 transitions. [2021-02-19 18:51:41,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 18:51:41,810 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) 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 27 [2021-02-19 18:51:41,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:41,813 INFO L225 Difference]: With dead ends: 1973 [2021-02-19 18:51:41,813 INFO L226 Difference]: Without dead ends: 1973 [2021-02-19 18:51:41,813 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:51:41,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1973 states. [2021-02-19 18:51:41,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1973 to 1690. [2021-02-19 18:51:41,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1689 states have (on average 3.2634695085849614) internal successors, (5512), 1689 states have internal predecessors, (5512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:41,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 5512 transitions. [2021-02-19 18:51:41,837 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 5512 transitions. Word has length 27 [2021-02-19 18:51:41,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:41,837 INFO L480 AbstractCegarLoop]: Abstraction has 1690 states and 5512 transitions. [2021-02-19 18:51:41,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) 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) [2021-02-19 18:51:41,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 5512 transitions. [2021-02-19 18:51:41,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:41,840 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:41,840 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:42,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-02-19 18:51:42,055 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:42,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:42,055 INFO L82 PathProgramCache]: Analyzing trace with hash 327227152, now seen corresponding path program 21 times [2021-02-19 18:51:42,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:42,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647361391] [2021-02-19 18:51:42,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:42,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:42,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:42,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647361391] [2021-02-19 18:51:42,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764187637] [2021-02-19 18:51:42,095 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 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 [2021-02-19 18:51:42,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:51:42,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:42,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:42,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:42,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:42,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:42,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-02-19 18:51:42,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108676715] [2021-02-19 18:51:42,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 18:51:42,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:42,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 18:51:42,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:51:42,186 INFO L87 Difference]: Start difference. First operand 1690 states and 5512 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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) [2021-02-19 18:51:42,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:42,500 INFO L93 Difference]: Finished difference Result 3078 states and 9480 transitions. [2021-02-19 18:51:42,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 18:51:42,500 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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 27 [2021-02-19 18:51:42,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:42,504 INFO L225 Difference]: With dead ends: 3078 [2021-02-19 18:51:42,505 INFO L226 Difference]: Without dead ends: 3078 [2021-02-19 18:51:42,505 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:51:42,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3078 states. [2021-02-19 18:51:42,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3078 to 1814. [2021-02-19 18:51:42,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 3.2465526751241036) internal successors, (5886), 1813 states have internal predecessors, (5886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:42,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 5886 transitions. [2021-02-19 18:51:42,542 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 5886 transitions. Word has length 27 [2021-02-19 18:51:42,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:42,542 INFO L480 AbstractCegarLoop]: Abstraction has 1814 states and 5886 transitions. [2021-02-19 18:51:42,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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) [2021-02-19 18:51:42,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 5886 transitions. [2021-02-19 18:51:42,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:42,545 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:42,545 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:42,757 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:42,758 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:42,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:42,758 INFO L82 PathProgramCache]: Analyzing trace with hash 979755060, now seen corresponding path program 22 times [2021-02-19 18:51:42,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:42,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005853504] [2021-02-19 18:51:42,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:42,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:42,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:42,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005853504] [2021-02-19 18:51:42,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052006557] [2021-02-19 18:51:42,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:42,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:51:42,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:42,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:42,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:42,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:42,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:42,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-02-19 18:51:42,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740666305] [2021-02-19 18:51:42,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:51:42,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:42,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:51:42,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:51:42,855 INFO L87 Difference]: Start difference. First operand 1814 states and 5886 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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) [2021-02-19 18:51:43,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:43,124 INFO L93 Difference]: Finished difference Result 3165 states and 9710 transitions. [2021-02-19 18:51:43,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 18:51:43,124 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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 27 [2021-02-19 18:51:43,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:43,128 INFO L225 Difference]: With dead ends: 3165 [2021-02-19 18:51:43,128 INFO L226 Difference]: Without dead ends: 3165 [2021-02-19 18:51:43,129 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:51:43,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3165 states. [2021-02-19 18:51:43,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3165 to 1928. [2021-02-19 18:51:43,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 3.2283341982355993) internal successors, (6221), 1927 states have internal predecessors, (6221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:43,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 6221 transitions. [2021-02-19 18:51:43,159 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 6221 transitions. Word has length 27 [2021-02-19 18:51:43,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:43,159 INFO L480 AbstractCegarLoop]: Abstraction has 1928 states and 6221 transitions. [2021-02-19 18:51:43,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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) [2021-02-19 18:51:43,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 6221 transitions. [2021-02-19 18:51:43,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:43,161 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:43,161 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:43,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-02-19 18:51:43,366 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:43,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:43,366 INFO L82 PathProgramCache]: Analyzing trace with hash -570175880, now seen corresponding path program 23 times [2021-02-19 18:51:43,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:43,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908821469] [2021-02-19 18:51:43,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:43,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:43,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:51:43,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908821469] [2021-02-19 18:51:43,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431612921] [2021-02-19 18:51:43,392 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:43,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:51:43,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:43,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:43,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:43,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:51:43,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:43,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-02-19 18:51:43,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64849414] [2021-02-19 18:51:43,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:51:43,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:43,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:51:43,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:51:43,462 INFO L87 Difference]: Start difference. First operand 1928 states and 6221 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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) [2021-02-19 18:51:43,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:43,700 INFO L93 Difference]: Finished difference Result 3029 states and 9362 transitions. [2021-02-19 18:51:43,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 18:51:43,701 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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 27 [2021-02-19 18:51:43,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:43,705 INFO L225 Difference]: With dead ends: 3029 [2021-02-19 18:51:43,705 INFO L226 Difference]: Without dead ends: 3025 [2021-02-19 18:51:43,705 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:51:43,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3025 states. [2021-02-19 18:51:43,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3025 to 1928. [2021-02-19 18:51:43,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 3.2272963155163468) internal successors, (6219), 1927 states have internal predecessors, (6219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:43,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 6219 transitions. [2021-02-19 18:51:43,742 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 6219 transitions. Word has length 27 [2021-02-19 18:51:43,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:43,743 INFO L480 AbstractCegarLoop]: Abstraction has 1928 states and 6219 transitions. [2021-02-19 18:51:43,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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) [2021-02-19 18:51:43,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 6219 transitions. [2021-02-19 18:51:43,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:43,745 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:43,746 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:43,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-02-19 18:51:43,958 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:43,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:43,958 INFO L82 PathProgramCache]: Analyzing trace with hash 921828852, now seen corresponding path program 24 times [2021-02-19 18:51:43,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:43,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302417199] [2021-02-19 18:51:43,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:43,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:43,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:43,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302417199] [2021-02-19 18:51:43,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314194149] [2021-02-19 18:51:43,985 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:51:44,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:51:44,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:44,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:44,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:44,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:44,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:44,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-02-19 18:51:44,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642590349] [2021-02-19 18:51:44,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 18:51:44,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:44,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 18:51:44,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:51:44,061 INFO L87 Difference]: Start difference. First operand 1928 states and 6219 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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) [2021-02-19 18:51:44,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:44,301 INFO L93 Difference]: Finished difference Result 3009 states and 9316 transitions. [2021-02-19 18:51:44,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 18:51:44,302 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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 27 [2021-02-19 18:51:44,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:44,305 INFO L225 Difference]: With dead ends: 3009 [2021-02-19 18:51:44,305 INFO L226 Difference]: Without dead ends: 2993 [2021-02-19 18:51:44,306 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:51:44,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2993 states. [2021-02-19 18:51:44,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2993 to 1936. [2021-02-19 18:51:44,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1936 states, 1935 states have (on average 3.221188630490956) internal successors, (6233), 1935 states have internal predecessors, (6233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:44,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1936 states to 1936 states and 6233 transitions. [2021-02-19 18:51:44,335 INFO L78 Accepts]: Start accepts. Automaton has 1936 states and 6233 transitions. Word has length 27 [2021-02-19 18:51:44,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:44,335 INFO L480 AbstractCegarLoop]: Abstraction has 1936 states and 6233 transitions. [2021-02-19 18:51:44,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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) [2021-02-19 18:51:44,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1936 states and 6233 transitions. [2021-02-19 18:51:44,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:44,337 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:44,338 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:44,538 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-02-19 18:51:44,538 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:44,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:44,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1031957388, now seen corresponding path program 25 times [2021-02-19 18:51:44,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:44,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507356668] [2021-02-19 18:51:44,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:44,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:44,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:44,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507356668] [2021-02-19 18:51:44,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084539701] [2021-02-19 18:51:44,573 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:44,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:44,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:44,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:44,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:44,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 18:51:44,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055654478] [2021-02-19 18:51:44,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 18:51:44,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:44,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 18:51:44,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:51:44,674 INFO L87 Difference]: Start difference. First operand 1936 states and 6233 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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) [2021-02-19 18:51:45,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:45,251 INFO L93 Difference]: Finished difference Result 5256 states and 16466 transitions. [2021-02-19 18:51:45,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 18:51:45,254 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:51:45,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:45,262 INFO L225 Difference]: With dead ends: 5256 [2021-02-19 18:51:45,263 INFO L226 Difference]: Without dead ends: 5256 [2021-02-19 18:51:45,263 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 18:51:45,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5256 states. [2021-02-19 18:51:45,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5256 to 2054. [2021-02-19 18:51:45,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2054 states, 2053 states have (on average 3.297613248904043) internal successors, (6770), 2053 states have internal predecessors, (6770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:45,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 6770 transitions. [2021-02-19 18:51:45,308 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 6770 transitions. Word has length 27 [2021-02-19 18:51:45,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:45,308 INFO L480 AbstractCegarLoop]: Abstraction has 2054 states and 6770 transitions. [2021-02-19 18:51:45,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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) [2021-02-19 18:51:45,308 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 6770 transitions. [2021-02-19 18:51:45,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:45,312 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:45,312 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:45,526 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-02-19 18:51:45,527 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:45,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:45,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1225858056, now seen corresponding path program 26 times [2021-02-19 18:51:45,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:45,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335419424] [2021-02-19 18:51:45,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:45,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:45,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:45,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335419424] [2021-02-19 18:51:45,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833445503] [2021-02-19 18:51:45,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:51:45,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:51:45,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:45,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:45,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:45,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:45,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:45,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 18:51:45,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481912295] [2021-02-19 18:51:45,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 18:51:45,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:45,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 18:51:45,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:51:45,674 INFO L87 Difference]: Start difference. First operand 2054 states and 6770 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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) [2021-02-19 18:51:46,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:46,200 INFO L93 Difference]: Finished difference Result 5169 states and 16251 transitions. [2021-02-19 18:51:46,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 18:51:46,200 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:51:46,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:46,208 INFO L225 Difference]: With dead ends: 5169 [2021-02-19 18:51:46,208 INFO L226 Difference]: Without dead ends: 5169 [2021-02-19 18:51:46,208 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 18:51:46,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5169 states. [2021-02-19 18:51:46,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5169 to 2051. [2021-02-19 18:51:46,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.295609756097561) internal successors, (6756), 2050 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:46,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 6756 transitions. [2021-02-19 18:51:46,250 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 6756 transitions. Word has length 27 [2021-02-19 18:51:46,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:46,250 INFO L480 AbstractCegarLoop]: Abstraction has 2051 states and 6756 transitions. [2021-02-19 18:51:46,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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) [2021-02-19 18:51:46,250 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 6756 transitions. [2021-02-19 18:51:46,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:46,253 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:46,253 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:46,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-02-19 18:51:46,453 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:46,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:46,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1597767822, now seen corresponding path program 27 times [2021-02-19 18:51:46,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:46,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025945183] [2021-02-19 18:51:46,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:46,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:46,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:46,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025945183] [2021-02-19 18:51:46,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063577404] [2021-02-19 18:51:46,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:46,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:51:46,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:46,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:46,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:46,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:46,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:46,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 18:51:46,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42363362] [2021-02-19 18:51:46,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 18:51:46,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:46,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 18:51:46,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:51:46,572 INFO L87 Difference]: Start difference. First operand 2051 states and 6756 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:46,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:46,999 INFO L93 Difference]: Finished difference Result 4755 states and 14772 transitions. [2021-02-19 18:51:46,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-02-19 18:51:46,999 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:51:46,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:47,004 INFO L225 Difference]: With dead ends: 4755 [2021-02-19 18:51:47,005 INFO L226 Difference]: Without dead ends: 4755 [2021-02-19 18:51:47,005 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:51:47,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4755 states. [2021-02-19 18:51:47,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4755 to 2057. [2021-02-19 18:51:47,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2057 states, 2056 states have (on average 3.2981517509727625) internal successors, (6781), 2056 states have internal predecessors, (6781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:47,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2057 states to 2057 states and 6781 transitions. [2021-02-19 18:51:47,047 INFO L78 Accepts]: Start accepts. Automaton has 2057 states and 6781 transitions. Word has length 27 [2021-02-19 18:51:47,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:47,047 INFO L480 AbstractCegarLoop]: Abstraction has 2057 states and 6781 transitions. [2021-02-19 18:51:47,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:47,047 INFO L276 IsEmpty]: Start isEmpty. Operand 2057 states and 6781 transitions. [2021-02-19 18:51:47,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:47,050 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:47,050 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:47,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:47,251 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:47,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:47,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1786986120, now seen corresponding path program 28 times [2021-02-19 18:51:47,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:47,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858874132] [2021-02-19 18:51:47,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:47,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:47,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:47,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858874132] [2021-02-19 18:51:47,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217696349] [2021-02-19 18:51:47,289 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:51:47,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:51:47,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:47,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:47,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:47,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:47,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:47,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 18:51:47,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211217665] [2021-02-19 18:51:47,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 18:51:47,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:47,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 18:51:47,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:51:47,378 INFO L87 Difference]: Start difference. First operand 2057 states and 6781 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:47,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:47,776 INFO L93 Difference]: Finished difference Result 4606 states and 14402 transitions. [2021-02-19 18:51:47,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 18:51:47,777 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:51:47,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:47,784 INFO L225 Difference]: With dead ends: 4606 [2021-02-19 18:51:47,784 INFO L226 Difference]: Without dead ends: 4602 [2021-02-19 18:51:47,784 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:51:47,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2021-02-19 18:51:47,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 2051. [2021-02-19 18:51:47,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.295609756097561) internal successors, (6756), 2050 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:47,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 6756 transitions. [2021-02-19 18:51:47,828 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 6756 transitions. Word has length 27 [2021-02-19 18:51:47,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:47,828 INFO L480 AbstractCegarLoop]: Abstraction has 2051 states and 6756 transitions. [2021-02-19 18:51:47,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:47,828 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 6756 transitions. [2021-02-19 18:51:47,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:47,831 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:47,831 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:48,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:48,032 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:48,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:48,032 INFO L82 PathProgramCache]: Analyzing trace with hash -397464904, now seen corresponding path program 29 times [2021-02-19 18:51:48,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:48,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550325118] [2021-02-19 18:51:48,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:48,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:48,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:48,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550325118] [2021-02-19 18:51:48,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814989213] [2021-02-19 18:51:48,064 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:51:48,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:51:48,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:48,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:48,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:48,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:48,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:48,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 18:51:48,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76378792] [2021-02-19 18:51:48,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 18:51:48,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:48,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 18:51:48,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:51:48,167 INFO L87 Difference]: Start difference. First operand 2051 states and 6756 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2021-02-19 18:51:48,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:48,591 INFO L93 Difference]: Finished difference Result 4605 states and 14373 transitions. [2021-02-19 18:51:48,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 18:51:48,591 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 27 [2021-02-19 18:51:48,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:48,598 INFO L225 Difference]: With dead ends: 4605 [2021-02-19 18:51:48,598 INFO L226 Difference]: Without dead ends: 4605 [2021-02-19 18:51:48,598 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 18:51:48,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4605 states. [2021-02-19 18:51:48,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4605 to 2057. [2021-02-19 18:51:48,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2057 states, 2056 states have (on average 3.2981517509727625) internal successors, (6781), 2056 states have internal predecessors, (6781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:48,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2057 states to 2057 states and 6781 transitions. [2021-02-19 18:51:48,641 INFO L78 Accepts]: Start accepts. Automaton has 2057 states and 6781 transitions. Word has length 27 [2021-02-19 18:51:48,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:48,641 INFO L480 AbstractCegarLoop]: Abstraction has 2057 states and 6781 transitions. [2021-02-19 18:51:48,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2021-02-19 18:51:48,641 INFO L276 IsEmpty]: Start isEmpty. Operand 2057 states and 6781 transitions. [2021-02-19 18:51:48,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:48,644 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:48,644 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:48,854 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-02-19 18:51:48,854 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:48,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:48,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1385184566, now seen corresponding path program 30 times [2021-02-19 18:51:48,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:48,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212109112] [2021-02-19 18:51:48,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:48,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:48,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:48,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212109112] [2021-02-19 18:51:48,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096457455] [2021-02-19 18:51:48,883 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 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 [2021-02-19 18:51:48,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:51:48,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:48,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:48,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:48,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:48,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:48,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 18:51:48,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889194044] [2021-02-19 18:51:48,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 18:51:48,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:48,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 18:51:48,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:51:48,999 INFO L87 Difference]: Start difference. First operand 2057 states and 6781 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2021-02-19 18:51:49,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:49,409 INFO L93 Difference]: Finished difference Result 4532 states and 14195 transitions. [2021-02-19 18:51:49,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 18:51:49,410 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 27 [2021-02-19 18:51:49,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:49,416 INFO L225 Difference]: With dead ends: 4532 [2021-02-19 18:51:49,416 INFO L226 Difference]: Without dead ends: 4528 [2021-02-19 18:51:49,417 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:51:49,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4528 states. [2021-02-19 18:51:49,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4528 to 2051. [2021-02-19 18:51:49,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.295609756097561) internal successors, (6756), 2050 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:49,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 6756 transitions. [2021-02-19 18:51:49,452 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 6756 transitions. Word has length 27 [2021-02-19 18:51:49,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:49,452 INFO L480 AbstractCegarLoop]: Abstraction has 2051 states and 6756 transitions. [2021-02-19 18:51:49,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2021-02-19 18:51:49,452 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 6756 transitions. [2021-02-19 18:51:49,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:49,454 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:49,454 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:49,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:49,655 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:49,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:49,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1866514250, now seen corresponding path program 31 times [2021-02-19 18:51:49,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:49,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90506642] [2021-02-19 18:51:49,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:49,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:49,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:49,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90506642] [2021-02-19 18:51:49,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017490234] [2021-02-19 18:51:49,689 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 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 [2021-02-19 18:51:49,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:49,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:49,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:49,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:49,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:49,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 18:51:49,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984587473] [2021-02-19 18:51:49,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:51:49,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:49,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:51:49,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:51:49,775 INFO L87 Difference]: Start difference. First operand 2051 states and 6756 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-02-19 18:51:50,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:50,179 INFO L93 Difference]: Finished difference Result 4168 states and 12771 transitions. [2021-02-19 18:51:50,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 18:51:50,179 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 27 [2021-02-19 18:51:50,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:50,185 INFO L225 Difference]: With dead ends: 4168 [2021-02-19 18:51:50,185 INFO L226 Difference]: Without dead ends: 4168 [2021-02-19 18:51:50,190 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 18:51:50,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4168 states. [2021-02-19 18:51:50,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4168 to 2247. [2021-02-19 18:51:50,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2246 states have (on average 3.2996438112199464) internal successors, (7411), 2246 states have internal predecessors, (7411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:50,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 7411 transitions. [2021-02-19 18:51:50,236 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 7411 transitions. Word has length 27 [2021-02-19 18:51:50,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:50,236 INFO L480 AbstractCegarLoop]: Abstraction has 2247 states and 7411 transitions. [2021-02-19 18:51:50,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-02-19 18:51:50,236 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 7411 transitions. [2021-02-19 18:51:50,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:50,239 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:50,239 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:50,454 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-02-19 18:51:50,454 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:50,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:50,454 INFO L82 PathProgramCache]: Analyzing trace with hash -2055732548, now seen corresponding path program 32 times [2021-02-19 18:51:50,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:50,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761245472] [2021-02-19 18:51:50,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:50,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:50,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:50,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761245472] [2021-02-19 18:51:50,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495653477] [2021-02-19 18:51:50,483 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 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 [2021-02-19 18:51:50,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:51:50,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:50,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:50,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:50,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:50,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:50,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 18:51:50,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969581762] [2021-02-19 18:51:50,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:51:50,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:50,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:51:50,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:51:50,568 INFO L87 Difference]: Start difference. First operand 2247 states and 7411 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-02-19 18:51:50,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:50,929 INFO L93 Difference]: Finished difference Result 3963 states and 12253 transitions. [2021-02-19 18:51:50,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 18:51:50,929 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 27 [2021-02-19 18:51:50,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:50,935 INFO L225 Difference]: With dead ends: 3963 [2021-02-19 18:51:50,935 INFO L226 Difference]: Without dead ends: 3959 [2021-02-19 18:51:50,936 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-02-19 18:51:50,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3959 states. [2021-02-19 18:51:50,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3959 to 2247. [2021-02-19 18:51:50,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2246 states have (on average 3.298753339269813) internal successors, (7409), 2246 states have internal predecessors, (7409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:50,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 7409 transitions. [2021-02-19 18:51:50,972 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 7409 transitions. Word has length 27 [2021-02-19 18:51:50,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:50,972 INFO L480 AbstractCegarLoop]: Abstraction has 2247 states and 7409 transitions. [2021-02-19 18:51:50,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-02-19 18:51:50,972 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 7409 transitions. [2021-02-19 18:51:50,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:50,975 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:50,975 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:51,175 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:51,175 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:51,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:51,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1412350288, now seen corresponding path program 33 times [2021-02-19 18:51:51,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:51,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083502287] [2021-02-19 18:51:51,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:51,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:51,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:51,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083502287] [2021-02-19 18:51:51,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327943559] [2021-02-19 18:51:51,211 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 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 [2021-02-19 18:51:51,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:51:51,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:51,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:51,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:51,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:51,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:51,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 18:51:51,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823068110] [2021-02-19 18:51:51,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:51:51,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:51,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:51:51,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:51:51,300 INFO L87 Difference]: Start difference. First operand 2247 states and 7409 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-02-19 18:51:51,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:51,547 INFO L93 Difference]: Finished difference Result 3687 states and 11591 transitions. [2021-02-19 18:51:51,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 18:51:51,547 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 27 [2021-02-19 18:51:51,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:51,553 INFO L225 Difference]: With dead ends: 3687 [2021-02-19 18:51:51,553 INFO L226 Difference]: Without dead ends: 3671 [2021-02-19 18:51:51,553 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:51:51,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3671 states. [2021-02-19 18:51:51,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3671 to 2247. [2021-02-19 18:51:51,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2246 states have (on average 3.296081923419412) internal successors, (7403), 2246 states have internal predecessors, (7403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:51,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 7403 transitions. [2021-02-19 18:51:51,596 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 7403 transitions. Word has length 27 [2021-02-19 18:51:51,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:51,596 INFO L480 AbstractCegarLoop]: Abstraction has 2247 states and 7403 transitions. [2021-02-19 18:51:51,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-02-19 18:51:51,596 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 7403 transitions. [2021-02-19 18:51:51,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:51,600 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:51,600 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:51,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-02-19 18:51:51,800 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:51,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:51,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1099994316, now seen corresponding path program 34 times [2021-02-19 18:51:51,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:51,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328854165] [2021-02-19 18:51:51,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:51,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:51,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:51,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328854165] [2021-02-19 18:51:51,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028725876] [2021-02-19 18:51:51,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:51,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:51:51,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:51,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:51,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:51,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:51,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:51,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 18:51:51,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079800553] [2021-02-19 18:51:51,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 18:51:51,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:51,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 18:51:51,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:51:51,939 INFO L87 Difference]: Start difference. First operand 2247 states and 7403 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2021-02-19 18:51:52,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:52,328 INFO L93 Difference]: Finished difference Result 3798 states and 11861 transitions. [2021-02-19 18:51:52,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 18:51:52,328 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 27 [2021-02-19 18:51:52,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:52,334 INFO L225 Difference]: With dead ends: 3798 [2021-02-19 18:51:52,334 INFO L226 Difference]: Without dead ends: 3798 [2021-02-19 18:51:52,334 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:51:52,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3798 states. [2021-02-19 18:51:52,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3798 to 2417. [2021-02-19 18:51:52,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 3.287251655629139) internal successors, (7942), 2416 states have internal predecessors, (7942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:52,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7942 transitions. [2021-02-19 18:51:52,373 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7942 transitions. Word has length 27 [2021-02-19 18:51:52,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:52,373 INFO L480 AbstractCegarLoop]: Abstraction has 2417 states and 7942 transitions. [2021-02-19 18:51:52,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2021-02-19 18:51:52,373 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7942 transitions. [2021-02-19 18:51:52,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:52,376 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:52,376 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:52,577 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-02-19 18:51:52,577 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:52,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:52,577 INFO L82 PathProgramCache]: Analyzing trace with hash 682655154, now seen corresponding path program 35 times [2021-02-19 18:51:52,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:52,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135645581] [2021-02-19 18:51:52,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:52,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:52,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:52,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135645581] [2021-02-19 18:51:52,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676168301] [2021-02-19 18:51:52,611 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:51:52,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:51:52,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:52,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:52,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:52,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:52,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:52,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 18:51:52,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545123664] [2021-02-19 18:51:52,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 18:51:52,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:52,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 18:51:52,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:51:52,710 INFO L87 Difference]: Start difference. First operand 2417 states and 7942 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2021-02-19 18:51:53,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:53,072 INFO L93 Difference]: Finished difference Result 3765 states and 11785 transitions. [2021-02-19 18:51:53,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 18:51:53,073 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 27 [2021-02-19 18:51:53,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:53,078 INFO L225 Difference]: With dead ends: 3765 [2021-02-19 18:51:53,078 INFO L226 Difference]: Without dead ends: 3761 [2021-02-19 18:51:53,078 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-02-19 18:51:53,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3761 states. [2021-02-19 18:51:53,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3761 to 2417. [2021-02-19 18:51:53,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 3.2864238410596025) internal successors, (7940), 2416 states have internal predecessors, (7940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:53,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7940 transitions. [2021-02-19 18:51:53,117 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7940 transitions. Word has length 27 [2021-02-19 18:51:53,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:53,117 INFO L480 AbstractCegarLoop]: Abstraction has 2417 states and 7940 transitions. [2021-02-19 18:51:53,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2021-02-19 18:51:53,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7940 transitions. [2021-02-19 18:51:53,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:51:53,121 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:53,121 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:53,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-02-19 18:51:53,321 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:53,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:53,322 INFO L82 PathProgramCache]: Analyzing trace with hash -162316298, now seen corresponding path program 36 times [2021-02-19 18:51:53,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:53,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791558282] [2021-02-19 18:51:53,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:53,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:53,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:53,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791558282] [2021-02-19 18:51:53,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712874723] [2021-02-19 18:51:53,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:53,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:51:53,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:53,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:51:53,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:53,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:53,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:53,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 18:51:53,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158032546] [2021-02-19 18:51:53,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 18:51:53,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:53,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 18:51:53,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:51:53,435 INFO L87 Difference]: Start difference. First operand 2417 states and 7940 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 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) [2021-02-19 18:51:53,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:53,642 INFO L93 Difference]: Finished difference Result 3553 states and 11291 transitions. [2021-02-19 18:51:53,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 18:51:53,643 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 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 27 [2021-02-19 18:51:53,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:53,648 INFO L225 Difference]: With dead ends: 3553 [2021-02-19 18:51:53,648 INFO L226 Difference]: Without dead ends: 3537 [2021-02-19 18:51:53,648 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-02-19 18:51:53,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3537 states. [2021-02-19 18:51:53,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3537 to 2417. [2021-02-19 18:51:53,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 3.2839403973509933) internal successors, (7934), 2416 states have internal predecessors, (7934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:53,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7934 transitions. [2021-02-19 18:51:53,684 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7934 transitions. Word has length 27 [2021-02-19 18:51:53,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:53,684 INFO L480 AbstractCegarLoop]: Abstraction has 2417 states and 7934 transitions. [2021-02-19 18:51:53,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 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) [2021-02-19 18:51:53,684 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7934 transitions. [2021-02-19 18:51:53,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:51:53,700 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:53,700 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:53,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:53,900 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:53,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:53,901 INFO L82 PathProgramCache]: Analyzing trace with hash 745415110, now seen corresponding path program 4 times [2021-02-19 18:51:53,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:53,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534824538] [2021-02-19 18:51:53,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:53,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:54,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:54,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534824538] [2021-02-19 18:51:54,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858978170] [2021-02-19 18:51:54,258 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:51:54,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:51:54,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:54,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:51:54,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:54,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:54,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:51:54,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-02-19 18:51:54,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:54,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:54,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:51:54,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-02-19 18:51:54,623 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:54,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:54,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:54,629 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:3 [2021-02-19 18:51:54,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:54,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:54,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-02-19 18:51:54,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567104797] [2021-02-19 18:51:54,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:51:54,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:54,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:51:54,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:51:54,651 INFO L87 Difference]: Start difference. First operand 2417 states and 7934 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:56,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:56,207 INFO L93 Difference]: Finished difference Result 3283 states and 10515 transitions. [2021-02-19 18:51:56,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 18:51:56,207 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:51:56,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:56,212 INFO L225 Difference]: With dead ends: 3283 [2021-02-19 18:51:56,212 INFO L226 Difference]: Without dead ends: 3268 [2021-02-19 18:51:56,212 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=281, Invalid=1441, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 18:51:56,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3268 states. [2021-02-19 18:51:56,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3268 to 2459. [2021-02-19 18:51:56,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2459 states, 2458 states have (on average 3.2782750203417415) internal successors, (8058), 2458 states have internal predecessors, (8058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:56,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2459 states to 2459 states and 8058 transitions. [2021-02-19 18:51:56,253 INFO L78 Accepts]: Start accepts. Automaton has 2459 states and 8058 transitions. Word has length 30 [2021-02-19 18:51:56,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:56,254 INFO L480 AbstractCegarLoop]: Abstraction has 2459 states and 8058 transitions. [2021-02-19 18:51:56,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:56,254 INFO L276 IsEmpty]: Start isEmpty. Operand 2459 states and 8058 transitions. [2021-02-19 18:51:56,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:51:56,257 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:56,257 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:56,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:56,462 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:56,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:56,462 INFO L82 PathProgramCache]: Analyzing trace with hash -721957958, now seen corresponding path program 5 times [2021-02-19 18:51:56,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:56,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773706781] [2021-02-19 18:51:56,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:56,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:56,807 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:56,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773706781] [2021-02-19 18:51:56,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858259594] [2021-02-19 18:51:56,807 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 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 [2021-02-19 18:51:56,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:51:56,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:51:56,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:51:56,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:57,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:57,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:51:57,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-02-19 18:51:57,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:57,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:57,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:51:57,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-02-19 18:51:57,056 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:57,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:57,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:57,061 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-02-19 18:51:57,084 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:57,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:57,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-02-19 18:51:57,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842244611] [2021-02-19 18:51:57,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:51:57,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:57,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:51:57,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:51:57,085 INFO L87 Difference]: Start difference. First operand 2459 states and 8058 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 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) [2021-02-19 18:51:58,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:51:58,431 INFO L93 Difference]: Finished difference Result 3284 states and 10521 transitions. [2021-02-19 18:51:58,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 18:51:58,431 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 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 30 [2021-02-19 18:51:58,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:51:58,436 INFO L225 Difference]: With dead ends: 3284 [2021-02-19 18:51:58,436 INFO L226 Difference]: Without dead ends: 3269 [2021-02-19 18:51:58,437 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=258, Invalid=1148, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 18:51:58,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3269 states. [2021-02-19 18:51:58,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3269 to 2471. [2021-02-19 18:51:58,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2471 states, 2470 states have (on average 3.2753036437246963) internal successors, (8090), 2470 states have internal predecessors, (8090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:51:58,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2471 states to 2471 states and 8090 transitions. [2021-02-19 18:51:58,472 INFO L78 Accepts]: Start accepts. Automaton has 2471 states and 8090 transitions. Word has length 30 [2021-02-19 18:51:58,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:51:58,472 INFO L480 AbstractCegarLoop]: Abstraction has 2471 states and 8090 transitions. [2021-02-19 18:51:58,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 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) [2021-02-19 18:51:58,472 INFO L276 IsEmpty]: Start isEmpty. Operand 2471 states and 8090 transitions. [2021-02-19 18:51:58,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:51:58,475 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:51:58,475 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:51:58,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-02-19 18:51:58,678 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:51:58,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:51:58,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1665366353, now seen corresponding path program 37 times [2021-02-19 18:51:58,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:51:58,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832023044] [2021-02-19 18:51:58,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:51:58,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:59,131 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:59,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832023044] [2021-02-19 18:51:59,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717594314] [2021-02-19 18:51:59,132 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:51:59,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:51:59,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:51:59,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:51:59,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:59,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:59,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:51:59,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:51:59,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-02-19 18:51:59,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:59,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:59,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:59,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:51:59,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:51:59,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:51:59,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-02-19 18:51:59,405 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:51:59,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:51:59,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:51:59,411 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-02-19 18:51:59,437 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:51:59,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:51:59,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-02-19 18:51:59,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307978144] [2021-02-19 18:51:59,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:51:59,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:51:59,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:51:59,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:51:59,438 INFO L87 Difference]: Start difference. First operand 2471 states and 8090 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:03,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:03,199 INFO L93 Difference]: Finished difference Result 3524 states and 11150 transitions. [2021-02-19 18:52:03,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-02-19 18:52:03,200 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:52:03,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:03,205 INFO L225 Difference]: With dead ends: 3524 [2021-02-19 18:52:03,205 INFO L226 Difference]: Without dead ends: 3498 [2021-02-19 18:52:03,206 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1521 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=653, Invalid=4749, Unknown=0, NotChecked=0, Total=5402 [2021-02-19 18:52:03,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3498 states. [2021-02-19 18:52:03,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3498 to 2550. [2021-02-19 18:52:03,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2550 states, 2549 states have (on average 3.26480972930561) internal successors, (8322), 2549 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:03,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 8322 transitions. [2021-02-19 18:52:03,243 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 8322 transitions. Word has length 30 [2021-02-19 18:52:03,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:03,243 INFO L480 AbstractCegarLoop]: Abstraction has 2550 states and 8322 transitions. [2021-02-19 18:52:03,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:03,243 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 8322 transitions. [2021-02-19 18:52:03,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:52:03,246 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:03,246 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:03,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:52:03,456 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:03,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:03,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1854264556, now seen corresponding path program 6 times [2021-02-19 18:52:03,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:03,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092122998] [2021-02-19 18:52:03,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:03,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:03,807 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:03,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092122998] [2021-02-19 18:52:03,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390370128] [2021-02-19 18:52:03,807 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 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 [2021-02-19 18:52:03,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:52:03,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:03,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:52:03,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:03,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:03,991 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:03,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-02-19 18:52:03,994 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:52:04,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:04,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-02-19 18:52:04,007 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-02-19 18:52:04,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:04,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:04,015 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:15 [2021-02-19 18:52:04,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:04,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:04,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-02-19 18:52:04,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632465638] [2021-02-19 18:52:04,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:52:04,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:04,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:52:04,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:52:04,100 INFO L87 Difference]: Start difference. First operand 2550 states and 8322 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:07,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:07,112 INFO L93 Difference]: Finished difference Result 4233 states and 13327 transitions. [2021-02-19 18:52:07,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-02-19 18:52:07,113 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:52:07,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:07,119 INFO L225 Difference]: With dead ends: 4233 [2021-02-19 18:52:07,119 INFO L226 Difference]: Without dead ends: 4208 [2021-02-19 18:52:07,120 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=481, Invalid=3425, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 18:52:07,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4208 states. [2021-02-19 18:52:07,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4208 to 2618. [2021-02-19 18:52:07,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2618 states, 2617 states have (on average 3.2777990064959877) internal successors, (8578), 2617 states have internal predecessors, (8578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:07,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2618 states to 2618 states and 8578 transitions. [2021-02-19 18:52:07,170 INFO L78 Accepts]: Start accepts. Automaton has 2618 states and 8578 transitions. Word has length 30 [2021-02-19 18:52:07,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:07,170 INFO L480 AbstractCegarLoop]: Abstraction has 2618 states and 8578 transitions. [2021-02-19 18:52:07,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:07,171 INFO L276 IsEmpty]: Start isEmpty. Operand 2618 states and 8578 transitions. [2021-02-19 18:52:07,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:52:07,174 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:07,174 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:07,374 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:52:07,374 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:07,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:07,374 INFO L82 PathProgramCache]: Analyzing trace with hash -458983583, now seen corresponding path program 38 times [2021-02-19 18:52:07,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:07,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058279416] [2021-02-19 18:52:07,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:07,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:07,858 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:07,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058279416] [2021-02-19 18:52:07,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3195869] [2021-02-19 18:52:07,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:52:07,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:52:07,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:07,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:52:07,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:08,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:08,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:08,184 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:08,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 51 [2021-02-19 18:52:08,200 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-02-19 18:52:08,220 INFO L628 ElimStorePlain]: treesize reduction 52, result has 37.3 percent of original size [2021-02-19 18:52:08,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:08,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:52:08,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-02-19 18:52:08,226 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-02-19 18:52:08,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:08,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:08,234 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:15 [2021-02-19 18:52:08,328 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:08,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:08,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2021-02-19 18:52:08,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480001230] [2021-02-19 18:52:08,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:52:08,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:08,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:52:08,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:52:08,341 INFO L87 Difference]: Start difference. First operand 2618 states and 8578 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:10,767 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-02-19 18:52:12,289 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-02-19 18:52:13,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:13,986 INFO L93 Difference]: Finished difference Result 4242 states and 13238 transitions. [2021-02-19 18:52:13,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-02-19 18:52:13,986 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:52:13,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:13,993 INFO L225 Difference]: With dead ends: 4242 [2021-02-19 18:52:13,993 INFO L226 Difference]: Without dead ends: 4220 [2021-02-19 18:52:13,993 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2011 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=866, Invalid=6106, Unknown=0, NotChecked=0, Total=6972 [2021-02-19 18:52:13,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4220 states. [2021-02-19 18:52:14,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4220 to 2648. [2021-02-19 18:52:14,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2648 states, 2647 states have (on average 3.2795617680392897) internal successors, (8681), 2647 states have internal predecessors, (8681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:14,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2648 states to 2648 states and 8681 transitions. [2021-02-19 18:52:14,035 INFO L78 Accepts]: Start accepts. Automaton has 2648 states and 8681 transitions. Word has length 30 [2021-02-19 18:52:14,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:14,035 INFO L480 AbstractCegarLoop]: Abstraction has 2648 states and 8681 transitions. [2021-02-19 18:52:14,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:14,035 INFO L276 IsEmpty]: Start isEmpty. Operand 2648 states and 8681 transitions. [2021-02-19 18:52:14,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:52:14,039 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:14,039 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:14,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-02-19 18:52:14,248 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:14,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:14,248 INFO L82 PathProgramCache]: Analyzing trace with hash 29537105, now seen corresponding path program 39 times [2021-02-19 18:52:14,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:14,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759496412] [2021-02-19 18:52:14,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:14,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:14,697 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:14,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759496412] [2021-02-19 18:52:14,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934272292] [2021-02-19 18:52:14,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:52:14,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:52:14,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:14,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:52:14,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:15,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:15,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:15,248 INFO L354 Elim1Store]: treesize reduction 26, result has 21.2 percent of original size [2021-02-19 18:52:15,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 121 treesize of output 102 [2021-02-19 18:52:15,253 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:52:15,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:15,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:52:15,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:15,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:15,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:52:15,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-02-19 18:52:15,274 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-02-19 18:52:15,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:15,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:15,287 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:134, output treesize:13 [2021-02-19 18:52:15,369 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:15,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:15,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-02-19 18:52:15,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143243452] [2021-02-19 18:52:15,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 18:52:15,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:15,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 18:52:15,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-02-19 18:52:15,370 INFO L87 Difference]: Start difference. First operand 2648 states and 8681 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:19,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:19,209 INFO L93 Difference]: Finished difference Result 4580 states and 14272 transitions. [2021-02-19 18:52:19,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-02-19 18:52:19,209 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:52:19,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:19,217 INFO L225 Difference]: With dead ends: 4580 [2021-02-19 18:52:19,217 INFO L226 Difference]: Without dead ends: 4550 [2021-02-19 18:52:19,217 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=571, Invalid=4259, Unknown=0, NotChecked=0, Total=4830 [2021-02-19 18:52:19,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4550 states. [2021-02-19 18:52:19,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4550 to 2789. [2021-02-19 18:52:19,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2789 states, 2788 states have (on average 3.2672166427546627) internal successors, (9109), 2788 states have internal predecessors, (9109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:19,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2789 states to 2789 states and 9109 transitions. [2021-02-19 18:52:19,277 INFO L78 Accepts]: Start accepts. Automaton has 2789 states and 9109 transitions. Word has length 30 [2021-02-19 18:52:19,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:19,277 INFO L480 AbstractCegarLoop]: Abstraction has 2789 states and 9109 transitions. [2021-02-19 18:52:19,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:19,277 INFO L276 IsEmpty]: Start isEmpty. Operand 2789 states and 9109 transitions. [2021-02-19 18:52:19,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:52:19,281 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:19,281 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:19,481 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:52:19,482 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:19,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:19,482 INFO L82 PathProgramCache]: Analyzing trace with hash -130348662, now seen corresponding path program 7 times [2021-02-19 18:52:19,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:19,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943741698] [2021-02-19 18:52:19,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:19,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:19,889 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:19,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943741698] [2021-02-19 18:52:19,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599826966] [2021-02-19 18:52:19,889 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 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 [2021-02-19 18:52:19,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:19,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:52:19,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:20,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:52:20,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:20,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-02-19 18:52:20,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:20,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:20,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:52:20,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-02-19 18:52:20,271 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:20,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:20,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:20,279 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:3 [2021-02-19 18:52:20,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:20,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:20,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-02-19 18:52:20,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663411277] [2021-02-19 18:52:20,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:52:20,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:20,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:52:20,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:52:20,304 INFO L87 Difference]: Start difference. First operand 2789 states and 9109 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:22,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:22,093 INFO L93 Difference]: Finished difference Result 3556 states and 11429 transitions. [2021-02-19 18:52:22,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 18:52:22,094 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:52:22,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:22,099 INFO L225 Difference]: With dead ends: 3556 [2021-02-19 18:52:22,100 INFO L226 Difference]: Without dead ends: 3541 [2021-02-19 18:52:22,100 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=280, Invalid=1360, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 18:52:22,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3541 states. [2021-02-19 18:52:22,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3541 to 2803. [2021-02-19 18:52:22,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2803 states, 2802 states have (on average 3.2658815132048535) internal successors, (9151), 2802 states have internal predecessors, (9151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:22,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2803 states to 2803 states and 9151 transitions. [2021-02-19 18:52:22,139 INFO L78 Accepts]: Start accepts. Automaton has 2803 states and 9151 transitions. Word has length 30 [2021-02-19 18:52:22,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:22,139 INFO L480 AbstractCegarLoop]: Abstraction has 2803 states and 9151 transitions. [2021-02-19 18:52:22,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:22,140 INFO L276 IsEmpty]: Start isEmpty. Operand 2803 states and 9151 transitions. [2021-02-19 18:52:22,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:52:22,143 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:22,143 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:22,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-02-19 18:52:22,344 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:22,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:22,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1597721730, now seen corresponding path program 8 times [2021-02-19 18:52:22,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:22,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327875103] [2021-02-19 18:52:22,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:22,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:22,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:22,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327875103] [2021-02-19 18:52:22,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293344262] [2021-02-19 18:52:22,771 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 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 [2021-02-19 18:52:22,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:52:22,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:22,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:52:22,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:22,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:22,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:22,981 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:22,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-02-19 18:52:22,983 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:52:22,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:22,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-02-19 18:52:22,994 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:52:23,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:23,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:23,002 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:17 [2021-02-19 18:52:23,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:23,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:23,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-02-19 18:52:23,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033875639] [2021-02-19 18:52:23,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:52:23,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:23,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:52:23,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:52:23,069 INFO L87 Difference]: Start difference. First operand 2803 states and 9151 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:26,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:26,296 INFO L93 Difference]: Finished difference Result 4051 states and 12986 transitions. [2021-02-19 18:52:26,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 18:52:26,297 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:52:26,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:26,303 INFO L225 Difference]: With dead ends: 4051 [2021-02-19 18:52:26,303 INFO L226 Difference]: Without dead ends: 4026 [2021-02-19 18:52:26,303 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=400, Invalid=2680, Unknown=0, NotChecked=0, Total=3080 [2021-02-19 18:52:26,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-02-19 18:52:26,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 2795. [2021-02-19 18:52:26,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2795 states, 2794 states have (on average 3.267716535433071) internal successors, (9130), 2794 states have internal predecessors, (9130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:26,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2795 states to 2795 states and 9130 transitions. [2021-02-19 18:52:26,347 INFO L78 Accepts]: Start accepts. Automaton has 2795 states and 9130 transitions. Word has length 30 [2021-02-19 18:52:26,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:26,348 INFO L480 AbstractCegarLoop]: Abstraction has 2795 states and 9130 transitions. [2021-02-19 18:52:26,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:26,348 INFO L276 IsEmpty]: Start isEmpty. Operand 2795 states and 9130 transitions. [2021-02-19 18:52:26,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:52:26,351 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:26,351 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:26,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:52:26,566 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:26,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:26,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1216244190, now seen corresponding path program 9 times [2021-02-19 18:52:26,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:26,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98816467] [2021-02-19 18:52:26,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:26,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:26,981 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:26,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98816467] [2021-02-19 18:52:26,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210282220] [2021-02-19 18:52:26,981 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 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 [2021-02-19 18:52:27,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:52:27,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:27,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 18:52:27,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:27,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:27,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:52:27,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-02-19 18:52:27,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:27,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:27,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:52:27,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-02-19 18:52:27,270 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:27,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:27,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:27,275 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-02-19 18:52:27,296 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:27,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:27,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-02-19 18:52:27,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136931205] [2021-02-19 18:52:27,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:52:27,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:27,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:52:27,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:52:27,297 INFO L87 Difference]: Start difference. First operand 2795 states and 9130 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:27,758 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-02-19 18:52:28,287 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-02-19 18:52:29,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:29,747 INFO L93 Difference]: Finished difference Result 3546 states and 11382 transitions. [2021-02-19 18:52:29,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-02-19 18:52:29,747 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:52:29,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:29,752 INFO L225 Difference]: With dead ends: 3546 [2021-02-19 18:52:29,752 INFO L226 Difference]: Without dead ends: 3531 [2021-02-19 18:52:29,753 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=386, Invalid=1966, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 18:52:29,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3531 states. [2021-02-19 18:52:29,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3531 to 2798. [2021-02-19 18:52:29,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2798 states, 2797 states have (on average 3.2685019663925634) internal successors, (9142), 2797 states have internal predecessors, (9142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:29,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2798 states to 2798 states and 9142 transitions. [2021-02-19 18:52:29,786 INFO L78 Accepts]: Start accepts. Automaton has 2798 states and 9142 transitions. Word has length 30 [2021-02-19 18:52:29,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:29,786 INFO L480 AbstractCegarLoop]: Abstraction has 2798 states and 9142 transitions. [2021-02-19 18:52:29,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:29,786 INFO L276 IsEmpty]: Start isEmpty. Operand 2798 states and 9142 transitions. [2021-02-19 18:52:29,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:52:29,789 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:29,789 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:29,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-02-19 18:52:29,989 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:29,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:29,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1505665102, now seen corresponding path program 10 times [2021-02-19 18:52:29,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:29,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286706837] [2021-02-19 18:52:29,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:29,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:30,337 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:30,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286706837] [2021-02-19 18:52:30,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832902561] [2021-02-19 18:52:30,337 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 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 [2021-02-19 18:52:30,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:52:30,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:30,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:52:30,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:30,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:30,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:52:30,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-02-19 18:52:30,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:30,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:30,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:52:30,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-02-19 18:52:30,749 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:30,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:30,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:30,757 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:3 [2021-02-19 18:52:30,781 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:30,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:30,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-02-19 18:52:30,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780522246] [2021-02-19 18:52:30,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:52:30,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:30,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:52:30,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:52:30,782 INFO L87 Difference]: Start difference. First operand 2798 states and 9142 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:31,257 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2021-02-19 18:52:31,735 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2021-02-19 18:52:32,625 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-02-19 18:52:33,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:33,162 INFO L93 Difference]: Finished difference Result 3725 states and 11923 transitions. [2021-02-19 18:52:33,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 18:52:33,162 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:52:33,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:33,168 INFO L225 Difference]: With dead ends: 3725 [2021-02-19 18:52:33,168 INFO L226 Difference]: Without dead ends: 3710 [2021-02-19 18:52:33,168 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=457, Invalid=1993, Unknown=0, NotChecked=0, Total=2450 [2021-02-19 18:52:33,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3710 states. [2021-02-19 18:52:33,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3710 to 2807. [2021-02-19 18:52:33,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2807 states, 2806 states have (on average 3.270848182466144) internal successors, (9178), 2806 states have internal predecessors, (9178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:33,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2807 states to 2807 states and 9178 transitions. [2021-02-19 18:52:33,219 INFO L78 Accepts]: Start accepts. Automaton has 2807 states and 9178 transitions. Word has length 30 [2021-02-19 18:52:33,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:33,219 INFO L480 AbstractCegarLoop]: Abstraction has 2807 states and 9178 transitions. [2021-02-19 18:52:33,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:33,219 INFO L276 IsEmpty]: Start isEmpty. Operand 2807 states and 9178 transitions. [2021-02-19 18:52:33,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:52:33,222 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:33,222 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:33,422 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-02-19 18:52:33,422 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:33,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:33,423 INFO L82 PathProgramCache]: Analyzing trace with hash 923726380, now seen corresponding path program 11 times [2021-02-19 18:52:33,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:33,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082375417] [2021-02-19 18:52:33,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:33,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:33,936 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:33,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082375417] [2021-02-19 18:52:33,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393528536] [2021-02-19 18:52:33,936 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:52:33,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:52:33,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:33,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:52:33,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:52:34,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:34,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:52:34,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-02-19 18:52:34,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:34,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:34,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:52:34,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-02-19 18:52:34,260 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:34,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:34,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:34,270 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:52, output treesize:7 [2021-02-19 18:52:34,305 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:34,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:34,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-02-19 18:52:34,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524271903] [2021-02-19 18:52:34,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 18:52:34,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:34,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 18:52:34,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-02-19 18:52:34,306 INFO L87 Difference]: Start difference. First operand 2807 states and 9178 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) [2021-02-19 18:52:35,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:35,578 INFO L93 Difference]: Finished difference Result 3680 states and 11820 transitions. [2021-02-19 18:52:35,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 18:52:35,579 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 30 [2021-02-19 18:52:35,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:35,584 INFO L225 Difference]: With dead ends: 3680 [2021-02-19 18:52:35,584 INFO L226 Difference]: Without dead ends: 3661 [2021-02-19 18:52:35,584 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:52:35,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3661 states. [2021-02-19 18:52:35,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3661 to 2851. [2021-02-19 18:52:35,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2851 states, 2850 states have (on average 3.2712280701754386) internal successors, (9323), 2850 states have internal predecessors, (9323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:35,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2851 states to 2851 states and 9323 transitions. [2021-02-19 18:52:35,620 INFO L78 Accepts]: Start accepts. Automaton has 2851 states and 9323 transitions. Word has length 30 [2021-02-19 18:52:35,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:35,620 INFO L480 AbstractCegarLoop]: Abstraction has 2851 states and 9323 transitions. [2021-02-19 18:52:35,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) [2021-02-19 18:52:35,621 INFO L276 IsEmpty]: Start isEmpty. Operand 2851 states and 9323 transitions. [2021-02-19 18:52:35,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:52:35,624 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:35,624 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:35,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-02-19 18:52:35,826 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:35,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:35,826 INFO L82 PathProgramCache]: Analyzing trace with hash -811045396, now seen corresponding path program 12 times [2021-02-19 18:52:35,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:35,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949474128] [2021-02-19 18:52:35,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:35,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:36,201 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:36,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949474128] [2021-02-19 18:52:36,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388871788] [2021-02-19 18:52:36,201 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 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 [2021-02-19 18:52:36,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:52:36,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:36,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:52:36,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:36,479 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:36,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 47 [2021-02-19 18:52:36,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:52:36,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:36,552 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:36,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 42 [2021-02-19 18:52:36,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:36,599 INFO L354 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2021-02-19 18:52:36,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 62 [2021-02-19 18:52:36,611 INFO L550 ElimStorePlain]: Start of recursive call 4: 2 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:36,693 INFO L628 ElimStorePlain]: treesize reduction 38, result has 61.6 percent of original size [2021-02-19 18:52:36,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:36,703 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:44, output treesize:150 [2021-02-19 18:52:36,903 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-02-19 18:52:37,222 WARN L202 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-02-19 18:52:37,384 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-02-19 18:52:37,441 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:37,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:37,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-02-19 18:52:37,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293390906] [2021-02-19 18:52:37,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:52:37,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:37,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:52:37,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:52:37,443 INFO L87 Difference]: Start difference. First operand 2851 states and 9323 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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) [2021-02-19 18:52:37,600 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 38 [2021-02-19 18:52:37,810 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 42 [2021-02-19 18:52:38,275 WARN L202 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 86 [2021-02-19 18:52:38,407 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 39 [2021-02-19 18:52:38,663 WARN L202 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 48 [2021-02-19 18:52:39,040 WARN L202 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-02-19 18:52:39,341 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 34 [2021-02-19 18:52:39,634 WARN L202 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 71 [2021-02-19 18:52:39,991 WARN L202 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2021-02-19 18:52:40,239 WARN L202 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 68 [2021-02-19 18:52:40,687 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 47 [2021-02-19 18:52:40,858 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 44 [2021-02-19 18:52:41,164 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 40 [2021-02-19 18:52:41,415 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2021-02-19 18:52:41,782 WARN L202 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 62 [2021-02-19 18:52:42,107 WARN L202 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2021-02-19 18:52:42,578 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 36 [2021-02-19 18:52:42,772 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 47 [2021-02-19 18:52:43,223 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 51 [2021-02-19 18:52:43,885 WARN L202 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2021-02-19 18:52:44,523 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 44 [2021-02-19 18:52:44,830 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 58 [2021-02-19 18:52:45,528 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-02-19 18:52:45,955 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-02-19 18:52:46,193 WARN L202 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-02-19 18:52:46,445 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 37 [2021-02-19 18:52:46,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:46,511 INFO L93 Difference]: Finished difference Result 4576 states and 14508 transitions. [2021-02-19 18:52:46,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-02-19 18:52:46,512 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:52:46,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:46,520 INFO L225 Difference]: With dead ends: 4576 [2021-02-19 18:52:46,520 INFO L226 Difference]: Without dead ends: 4561 [2021-02-19 18:52:46,521 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2357 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=1190, Invalid=5782, Unknown=0, NotChecked=0, Total=6972 [2021-02-19 18:52:46,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4561 states. [2021-02-19 18:52:46,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4561 to 2876. [2021-02-19 18:52:46,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2876 states, 2875 states have (on average 3.278608695652174) internal successors, (9426), 2875 states have internal predecessors, (9426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:46,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2876 states to 2876 states and 9426 transitions. [2021-02-19 18:52:46,575 INFO L78 Accepts]: Start accepts. Automaton has 2876 states and 9426 transitions. Word has length 30 [2021-02-19 18:52:46,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:46,575 INFO L480 AbstractCegarLoop]: Abstraction has 2876 states and 9426 transitions. [2021-02-19 18:52:46,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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) [2021-02-19 18:52:46,575 INFO L276 IsEmpty]: Start isEmpty. Operand 2876 states and 9426 transitions. [2021-02-19 18:52:46,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:52:46,579 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:46,579 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:46,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-02-19 18:52:46,779 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:46,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:46,780 INFO L82 PathProgramCache]: Analyzing trace with hash 860920547, now seen corresponding path program 40 times [2021-02-19 18:52:46,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:46,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281611182] [2021-02-19 18:52:46,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:46,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:47,419 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:47,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281611182] [2021-02-19 18:52:47,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84114210] [2021-02-19 18:52:47,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:52:47,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:52:47,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:47,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 18:52:47,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:52:47,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:47,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:47,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:52:47,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:52:47,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-02-19 18:52:47,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:47,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:47,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:47,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:47,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:52:47,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:52:47,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-02-19 18:52:47,855 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:52:47,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:47,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:47,862 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-02-19 18:52:47,901 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:47,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:47,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2021-02-19 18:52:47,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780207749] [2021-02-19 18:52:47,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-19 18:52:47,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:47,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-19 18:52:47,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-02-19 18:52:47,902 INFO L87 Difference]: Start difference. First operand 2876 states and 9426 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:48,579 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-02-19 18:52:49,209 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-02-19 18:52:49,781 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-02-19 18:52:50,342 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-02-19 18:52:50,582 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-02-19 18:52:52,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:52,430 INFO L93 Difference]: Finished difference Result 5666 states and 17654 transitions. [2021-02-19 18:52:52,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-02-19 18:52:52,431 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:52:52,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:52,440 INFO L225 Difference]: With dead ends: 5666 [2021-02-19 18:52:52,440 INFO L226 Difference]: Without dead ends: 5636 [2021-02-19 18:52:52,441 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1185 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=575, Invalid=3715, Unknown=0, NotChecked=0, Total=4290 [2021-02-19 18:52:52,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5636 states. [2021-02-19 18:52:52,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5636 to 2948. [2021-02-19 18:52:52,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2948 states, 2947 states have (on average 3.2972514421445536) internal successors, (9717), 2947 states have internal predecessors, (9717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:52,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2948 states to 2948 states and 9717 transitions. [2021-02-19 18:52:52,508 INFO L78 Accepts]: Start accepts. Automaton has 2948 states and 9717 transitions. Word has length 30 [2021-02-19 18:52:52,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:52,509 INFO L480 AbstractCegarLoop]: Abstraction has 2948 states and 9717 transitions. [2021-02-19 18:52:52,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:52,509 INFO L276 IsEmpty]: Start isEmpty. Operand 2948 states and 9717 transitions. [2021-02-19 18:52:52,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:52:52,513 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:52,513 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:52,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:52:52,713 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:52,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:52,714 INFO L82 PathProgramCache]: Analyzing trace with hash 577548821, now seen corresponding path program 41 times [2021-02-19 18:52:52,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:52,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549731701] [2021-02-19 18:52:52,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:52,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:52:53,353 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:53,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549731701] [2021-02-19 18:52:53,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927592842] [2021-02-19 18:52:53,354 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:52:53,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:52:53,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:52:53,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:52:53,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:52:53,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:53,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:53,801 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:53,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 51 [2021-02-19 18:52:53,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-02-19 18:52:53,840 INFO L628 ElimStorePlain]: treesize reduction 39, result has 46.6 percent of original size [2021-02-19 18:52:53,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:52:53,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:52:53,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-02-19 18:52:53,848 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-02-19 18:52:53,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:52:53,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:52:53,861 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:44, output treesize:18 [2021-02-19 18:52:54,006 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:52:54,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:52:54,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-02-19 18:52:54,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977443610] [2021-02-19 18:52:54,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 18:52:54,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:52:54,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 18:52:54,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-02-19 18:52:54,007 INFO L87 Difference]: Start difference. First operand 2948 states and 9717 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:54,712 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-02-19 18:52:55,461 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-02-19 18:52:55,725 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2021-02-19 18:52:56,169 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-02-19 18:52:57,037 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-02-19 18:52:57,317 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-02-19 18:52:57,786 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2021-02-19 18:52:58,031 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-02-19 18:52:58,294 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-02-19 18:52:58,560 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-02-19 18:52:58,820 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-02-19 18:52:59,067 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-02-19 18:52:59,327 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-02-19 18:52:59,469 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-02-19 18:52:59,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:52:59,634 INFO L93 Difference]: Finished difference Result 5003 states and 15904 transitions. [2021-02-19 18:52:59,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 18:52:59,634 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:52:59,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:52:59,641 INFO L225 Difference]: With dead ends: 5003 [2021-02-19 18:52:59,641 INFO L226 Difference]: Without dead ends: 4973 [2021-02-19 18:52:59,642 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=594, Invalid=3828, Unknown=0, NotChecked=0, Total=4422 [2021-02-19 18:52:59,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4973 states. [2021-02-19 18:52:59,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4973 to 2954. [2021-02-19 18:52:59,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2954 states, 2953 states have (on average 3.2996952251947174) internal successors, (9744), 2953 states have internal predecessors, (9744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:59,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2954 states to 2954 states and 9744 transitions. [2021-02-19 18:52:59,697 INFO L78 Accepts]: Start accepts. Automaton has 2954 states and 9744 transitions. Word has length 30 [2021-02-19 18:52:59,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:52:59,697 INFO L480 AbstractCegarLoop]: Abstraction has 2954 states and 9744 transitions. [2021-02-19 18:52:59,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:52:59,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2954 states and 9744 transitions. [2021-02-19 18:52:59,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:52:59,701 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:52:59,701 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:52:59,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:52:59,901 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:52:59,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:52:59,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1944310639, now seen corresponding path program 42 times [2021-02-19 18:52:59,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:52:59,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655128122] [2021-02-19 18:52:59,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:52:59,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:00,403 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:53:00,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655128122] [2021-02-19 18:53:00,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333067456] [2021-02-19 18:53:00,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:53:00,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:53:00,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:53:00,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:53:00,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:00,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:53:00,725 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-02-19 18:53:00,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 175 treesize of output 161 [2021-02-19 18:53:00,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:53:00,775 INFO L628 ElimStorePlain]: treesize reduction 44, result has 41.3 percent of original size [2021-02-19 18:53:00,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:53:00,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:53:00,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-02-19 18:53:00,783 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-02-19 18:53:00,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:53:00,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:53:00,795 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:178, output treesize:15 [2021-02-19 18:53:00,882 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:53:00,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:00,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 24 [2021-02-19 18:53:00,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948386803] [2021-02-19 18:53:00,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:53:00,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:00,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:53:00,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:53:00,883 INFO L87 Difference]: Start difference. First operand 2954 states and 9744 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:01,546 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-02-19 18:53:02,380 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-02-19 18:53:02,613 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-02-19 18:53:02,840 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-02-19 18:53:03,348 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-02-19 18:53:03,582 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-02-19 18:53:03,747 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-02-19 18:53:04,588 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-02-19 18:53:04,891 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-02-19 18:53:05,355 WARN L202 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-02-19 18:53:05,724 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-02-19 18:53:06,277 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2021-02-19 18:53:06,977 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 56 [2021-02-19 18:53:07,277 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-02-19 18:53:07,432 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-02-19 18:53:07,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:53:07,752 INFO L93 Difference]: Finished difference Result 5907 states and 18501 transitions. [2021-02-19 18:53:07,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-02-19 18:53:07,753 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:53:07,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:53:07,761 INFO L225 Difference]: With dead ends: 5907 [2021-02-19 18:53:07,761 INFO L226 Difference]: Without dead ends: 5881 [2021-02-19 18:53:07,765 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2199 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1099, Invalid=5873, Unknown=0, NotChecked=0, Total=6972 [2021-02-19 18:53:07,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5881 states. [2021-02-19 18:53:07,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5881 to 2963. [2021-02-19 18:53:07,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2963 states, 2962 states have (on average 3.3018230925050642) internal successors, (9780), 2962 states have internal predecessors, (9780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:07,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2963 states to 2963 states and 9780 transitions. [2021-02-19 18:53:07,826 INFO L78 Accepts]: Start accepts. Automaton has 2963 states and 9780 transitions. Word has length 30 [2021-02-19 18:53:07,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:53:07,826 INFO L480 AbstractCegarLoop]: Abstraction has 2963 states and 9780 transitions. [2021-02-19 18:53:07,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:07,826 INFO L276 IsEmpty]: Start isEmpty. Operand 2963 states and 9780 transitions. [2021-02-19 18:53:07,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:53:07,829 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:53:07,829 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:53:08,038 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-02-19 18:53:08,038 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:53:08,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:53:08,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1119676269, now seen corresponding path program 43 times [2021-02-19 18:53:08,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:53:08,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428517285] [2021-02-19 18:53:08,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:53:08,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:08,618 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:53:08,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428517285] [2021-02-19 18:53:08,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139771219] [2021-02-19 18:53:08,618 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:53:08,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:08,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:53:08,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:08,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:53:08,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:53:08,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:53:08,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:53:08,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-02-19 18:53:08,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:53:08,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:53:08,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:53:08,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:53:09,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:53:09,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:53:09,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-02-19 18:53:09,002 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:53:09,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:53:09,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:53:09,009 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-02-19 18:53:09,038 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:53:09,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:09,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-02-19 18:53:09,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767792025] [2021-02-19 18:53:09,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:53:09,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:09,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:53:09,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:53:09,039 INFO L87 Difference]: Start difference. First operand 2963 states and 9780 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:11,634 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-02-19 18:53:12,565 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-02-19 18:53:12,748 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-02-19 18:53:12,987 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-02-19 18:53:13,349 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2021-02-19 18:53:14,143 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-02-19 18:53:14,378 WARN L202 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-02-19 18:53:14,986 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-02-19 18:53:15,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:53:15,843 INFO L93 Difference]: Finished difference Result 4207 states and 13375 transitions. [2021-02-19 18:53:15,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-02-19 18:53:15,843 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:53:15,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:53:15,850 INFO L225 Difference]: With dead ends: 4207 [2021-02-19 18:53:15,850 INFO L226 Difference]: Without dead ends: 4181 [2021-02-19 18:53:15,850 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2220 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=831, Invalid=6479, Unknown=0, NotChecked=0, Total=7310 [2021-02-19 18:53:15,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4181 states. [2021-02-19 18:53:15,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4181 to 2957. [2021-02-19 18:53:15,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2957 states, 2956 states have (on average 3.301420838971583) internal successors, (9759), 2956 states have internal predecessors, (9759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:15,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2957 states to 2957 states and 9759 transitions. [2021-02-19 18:53:15,887 INFO L78 Accepts]: Start accepts. Automaton has 2957 states and 9759 transitions. Word has length 30 [2021-02-19 18:53:15,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:53:15,887 INFO L480 AbstractCegarLoop]: Abstraction has 2957 states and 9759 transitions. [2021-02-19 18:53:15,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:15,887 INFO L276 IsEmpty]: Start isEmpty. Operand 2957 states and 9759 transitions. [2021-02-19 18:53:15,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:53:15,890 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:53:15,890 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:53:16,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-02-19 18:53:16,103 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:53:16,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:53:16,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1864900612, now seen corresponding path program 13 times [2021-02-19 18:53:16,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:53:16,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684654959] [2021-02-19 18:53:16,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:53:16,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:16,573 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:53:16,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684654959] [2021-02-19 18:53:16,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265521063] [2021-02-19 18:53:16,573 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 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 [2021-02-19 18:53:16,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:16,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:53:16,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:16,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:53:16,872 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:53:16,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2021-02-19 18:53:16,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:53:16,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:53:16,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:53:16,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 18:53:16,905 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:53:16,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:53:16,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:53:16,936 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-02-19 18:53:16,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2021-02-19 18:53:16,938 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:53:16,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:53:16,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:53:16,968 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:47, output treesize:56 [2021-02-19 18:53:17,076 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:53:17,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:17,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-02-19 18:53:17,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569914435] [2021-02-19 18:53:17,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:53:17,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:17,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:53:17,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:53:17,077 INFO L87 Difference]: Start difference. First operand 2957 states and 9759 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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) [2021-02-19 18:53:17,549 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-02-19 18:53:18,007 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 44 [2021-02-19 18:53:20,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:53:20,324 INFO L93 Difference]: Finished difference Result 4280 states and 13773 transitions. [2021-02-19 18:53:20,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 18:53:20,326 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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 30 [2021-02-19 18:53:20,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:53:20,333 INFO L225 Difference]: With dead ends: 4280 [2021-02-19 18:53:20,333 INFO L226 Difference]: Without dead ends: 4265 [2021-02-19 18:53:20,333 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=511, Invalid=2245, Unknown=0, NotChecked=0, Total=2756 [2021-02-19 18:53:20,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4265 states. [2021-02-19 18:53:20,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4265 to 2948. [2021-02-19 18:53:20,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2948 states, 2947 states have (on average 3.2982694265354597) internal successors, (9720), 2947 states have internal predecessors, (9720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:20,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2948 states to 2948 states and 9720 transitions. [2021-02-19 18:53:20,394 INFO L78 Accepts]: Start accepts. Automaton has 2948 states and 9720 transitions. Word has length 30 [2021-02-19 18:53:20,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:53:20,394 INFO L480 AbstractCegarLoop]: Abstraction has 2948 states and 9720 transitions. [2021-02-19 18:53:20,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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) [2021-02-19 18:53:20,394 INFO L276 IsEmpty]: Start isEmpty. Operand 2948 states and 9720 transitions. [2021-02-19 18:53:20,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:53:20,398 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:53:20,398 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:53:20,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-02-19 18:53:20,598 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:53:20,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:53:20,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1781541226, now seen corresponding path program 14 times [2021-02-19 18:53:20,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:53:20,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968391258] [2021-02-19 18:53:20,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:53:20,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:21,095 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:53:21,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968391258] [2021-02-19 18:53:21,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630609328] [2021-02-19 18:53:21,096 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 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 [2021-02-19 18:53:21,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:53:21,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:53:21,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 18:53:21,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:21,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:53:21,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:53:21,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-02-19 18:53:21,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:53:21,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:53:21,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:53:21,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-02-19 18:53:21,437 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:53:21,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:53:21,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:53:21,443 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-02-19 18:53:21,478 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:53:21,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:21,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-02-19 18:53:21,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259290003] [2021-02-19 18:53:21,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:53:21,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:21,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:53:21,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:53:21,480 INFO L87 Difference]: Start difference. First operand 2948 states and 9720 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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) [2021-02-19 18:53:22,256 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-02-19 18:53:22,593 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2021-02-19 18:53:23,362 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-02-19 18:53:23,711 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-02-19 18:53:24,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:53:24,161 INFO L93 Difference]: Finished difference Result 3673 states and 11907 transitions. [2021-02-19 18:53:24,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 18:53:24,161 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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 30 [2021-02-19 18:53:24,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:53:24,167 INFO L225 Difference]: With dead ends: 3673 [2021-02-19 18:53:24,167 INFO L226 Difference]: Without dead ends: 3658 [2021-02-19 18:53:24,167 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=253, Invalid=1469, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 18:53:24,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3658 states. [2021-02-19 18:53:24,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3658 to 2940. [2021-02-19 18:53:24,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2940 states, 2939 states have (on average 3.3001020755358965) internal successors, (9699), 2939 states have internal predecessors, (9699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:24,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2940 states to 2940 states and 9699 transitions. [2021-02-19 18:53:24,210 INFO L78 Accepts]: Start accepts. Automaton has 2940 states and 9699 transitions. Word has length 30 [2021-02-19 18:53:24,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:53:24,210 INFO L480 AbstractCegarLoop]: Abstraction has 2940 states and 9699 transitions. [2021-02-19 18:53:24,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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) [2021-02-19 18:53:24,210 INFO L276 IsEmpty]: Start isEmpty. Operand 2940 states and 9699 transitions. [2021-02-19 18:53:24,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:53:24,213 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:53:24,214 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:53:24,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:53:24,414 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:53:24,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:53:24,414 INFO L82 PathProgramCache]: Analyzing trace with hash 940368066, now seen corresponding path program 15 times [2021-02-19 18:53:24,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:53:24,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887325146] [2021-02-19 18:53:24,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:53:24,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:24,877 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:53:24,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887325146] [2021-02-19 18:53:24,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114755960] [2021-02-19 18:53:24,878 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 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 [2021-02-19 18:53:24,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:53:24,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:53:24,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:53:24,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:25,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:53:25,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:53:25,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-02-19 18:53:25,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:53:25,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:53:25,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:53:25,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-02-19 18:53:25,239 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:53:25,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:53:25,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:53:25,247 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:3 [2021-02-19 18:53:25,277 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:53:25,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:25,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-02-19 18:53:25,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61780151] [2021-02-19 18:53:25,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:53:25,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:25,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:53:25,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:53:25,278 INFO L87 Difference]: Start difference. First operand 2940 states and 9699 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:27,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:53:27,065 INFO L93 Difference]: Finished difference Result 3838 states and 12411 transitions. [2021-02-19 18:53:27,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 18:53:27,065 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:53:27,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:53:27,071 INFO L225 Difference]: With dead ends: 3838 [2021-02-19 18:53:27,071 INFO L226 Difference]: Without dead ends: 3817 [2021-02-19 18:53:27,071 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=256, Invalid=1226, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 18:53:27,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3817 states. [2021-02-19 18:53:27,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3817 to 2932. [2021-02-19 18:53:27,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2932 states, 2931 states have (on average 3.2992152848857046) internal successors, (9670), 2931 states have internal predecessors, (9670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:27,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2932 states to 2932 states and 9670 transitions. [2021-02-19 18:53:27,118 INFO L78 Accepts]: Start accepts. Automaton has 2932 states and 9670 transitions. Word has length 30 [2021-02-19 18:53:27,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:53:27,118 INFO L480 AbstractCegarLoop]: Abstraction has 2932 states and 9670 transitions. [2021-02-19 18:53:27,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:27,118 INFO L276 IsEmpty]: Start isEmpty. Operand 2932 states and 9670 transitions. [2021-02-19 18:53:27,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:53:27,122 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:53:27,122 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:53:27,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-02-19 18:53:27,336 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:53:27,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:53:27,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1864863120, now seen corresponding path program 16 times [2021-02-19 18:53:27,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:53:27,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317902566] [2021-02-19 18:53:27,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:53:27,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:27,872 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:53:27,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317902566] [2021-02-19 18:53:27,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862719419] [2021-02-19 18:53:27,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 18:53:27,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:53:27,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:53:27,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:53:27,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:28,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:53:28,325 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:53:28,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2021-02-19 18:53:28,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:53:28,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:53:28,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:53:28,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 18:53:28,379 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:53:28,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:53:28,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:53:28,419 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-02-19 18:53:28,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2021-02-19 18:53:28,422 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:53:28,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:53:28,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 18:53:28,473 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:47, output treesize:59 [2021-02-19 18:53:28,649 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:53:28,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:28,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-02-19 18:53:28,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457576671] [2021-02-19 18:53:28,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:53:28,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:28,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:53:28,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:53:28,650 INFO L87 Difference]: Start difference. First operand 2932 states and 9670 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-02-19 18:53:28,919 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 31 [2021-02-19 18:53:29,178 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2021-02-19 18:53:29,313 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 34 [2021-02-19 18:53:29,777 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 44 [2021-02-19 18:53:31,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:53:31,062 INFO L93 Difference]: Finished difference Result 4374 states and 14046 transitions. [2021-02-19 18:53:31,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 18:53:31,063 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 30 [2021-02-19 18:53:31,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:53:31,069 INFO L225 Difference]: With dead ends: 4374 [2021-02-19 18:53:31,069 INFO L226 Difference]: Without dead ends: 4349 [2021-02-19 18:53:31,069 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=357, Invalid=1623, Unknown=0, NotChecked=0, Total=1980 [2021-02-19 18:53:31,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4349 states. [2021-02-19 18:53:31,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4349 to 2926. [2021-02-19 18:53:31,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2926 states, 2925 states have (on average 3.296752136752137) internal successors, (9643), 2925 states have internal predecessors, (9643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:31,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2926 states to 2926 states and 9643 transitions. [2021-02-19 18:53:31,113 INFO L78 Accepts]: Start accepts. Automaton has 2926 states and 9643 transitions. Word has length 30 [2021-02-19 18:53:31,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:53:31,113 INFO L480 AbstractCegarLoop]: Abstraction has 2926 states and 9643 transitions. [2021-02-19 18:53:31,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-02-19 18:53:31,113 INFO L276 IsEmpty]: Start isEmpty. Operand 2926 states and 9643 transitions. [2021-02-19 18:53:31,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:53:31,116 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:53:31,116 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:53:31,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-02-19 18:53:31,317 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:53:31,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:53:31,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1503765354, now seen corresponding path program 17 times [2021-02-19 18:53:31,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:53:31,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588366307] [2021-02-19 18:53:31,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:53:31,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:31,957 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:53:31,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588366307] [2021-02-19 18:53:31,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736599062] [2021-02-19 18:53:31,957 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 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 [2021-02-19 18:53:31,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:53:31,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:53:31,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:53:31,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:32,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:53:32,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:53:32,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:53:32,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:53:32,308 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:53:32,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 33 [2021-02-19 18:53:32,312 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:53:32,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:53:32,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:53:32,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:53:32,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:53:32,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-02-19 18:53:32,342 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-02-19 18:53:32,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:53:32,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:53:32,364 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:46, output treesize:28 [2021-02-19 18:53:32,550 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:53:32,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:32,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 23 [2021-02-19 18:53:32,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036715345] [2021-02-19 18:53:32,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:53:32,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:32,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:53:32,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:53:32,551 INFO L87 Difference]: Start difference. First operand 2926 states and 9643 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-02-19 18:53:32,762 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 33 [2021-02-19 18:53:32,983 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2021-02-19 18:53:33,598 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-02-19 18:53:35,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:53:35,317 INFO L93 Difference]: Finished difference Result 4072 states and 13199 transitions. [2021-02-19 18:53:35,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 18:53:35,318 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 30 [2021-02-19 18:53:35,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:53:35,324 INFO L225 Difference]: With dead ends: 4072 [2021-02-19 18:53:35,325 INFO L226 Difference]: Without dead ends: 4047 [2021-02-19 18:53:35,325 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=323, Invalid=1657, Unknown=0, NotChecked=0, Total=1980 [2021-02-19 18:53:35,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4047 states. [2021-02-19 18:53:35,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4047 to 2926. [2021-02-19 18:53:35,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2926 states, 2925 states have (on average 3.296752136752137) internal successors, (9643), 2925 states have internal predecessors, (9643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:35,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2926 states to 2926 states and 9643 transitions. [2021-02-19 18:53:35,365 INFO L78 Accepts]: Start accepts. Automaton has 2926 states and 9643 transitions. Word has length 30 [2021-02-19 18:53:35,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:53:35,365 INFO L480 AbstractCegarLoop]: Abstraction has 2926 states and 9643 transitions. [2021-02-19 18:53:35,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-02-19 18:53:35,365 INFO L276 IsEmpty]: Start isEmpty. Operand 2926 states and 9643 transitions. [2021-02-19 18:53:35,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:53:35,368 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:53:35,369 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:53:35,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-02-19 18:53:35,569 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:53:35,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:53:35,569 INFO L82 PathProgramCache]: Analyzing trace with hash -2022929266, now seen corresponding path program 18 times [2021-02-19 18:53:35,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:53:35,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840908806] [2021-02-19 18:53:35,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:53:35,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:36,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:53:36,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840908806] [2021-02-19 18:53:36,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521774558] [2021-02-19 18:53:36,028 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 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 [2021-02-19 18:53:36,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:53:36,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:53:36,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:53:36,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:36,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:53:36,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:53:36,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-02-19 18:53:36,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:53:36,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:53:36,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:53:36,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-02-19 18:53:36,514 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:53:36,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:53:36,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:53:36,523 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-02-19 18:53:36,548 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:53:36,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:36,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-02-19 18:53:36,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279532167] [2021-02-19 18:53:36,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:53:36,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:36,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:53:36,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:53:36,549 INFO L87 Difference]: Start difference. First operand 2926 states and 9643 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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) [2021-02-19 18:53:39,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:53:39,060 INFO L93 Difference]: Finished difference Result 3897 states and 12594 transitions. [2021-02-19 18:53:39,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 18:53:39,061 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:53:39,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:53:39,068 INFO L225 Difference]: With dead ends: 3897 [2021-02-19 18:53:39,068 INFO L226 Difference]: Without dead ends: 3878 [2021-02-19 18:53:39,068 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=267, Invalid=1895, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 18:53:39,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3878 states. [2021-02-19 18:53:39,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3878 to 2991. [2021-02-19 18:53:39,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2991 states, 2990 states have (on average 3.2989966555183945) internal successors, (9864), 2990 states have internal predecessors, (9864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:39,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 9864 transitions. [2021-02-19 18:53:39,115 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 9864 transitions. Word has length 30 [2021-02-19 18:53:39,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:53:39,115 INFO L480 AbstractCegarLoop]: Abstraction has 2991 states and 9864 transitions. [2021-02-19 18:53:39,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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) [2021-02-19 18:53:39,115 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 9864 transitions. [2021-02-19 18:53:39,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:53:39,119 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:53:39,119 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:53:39,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:53:39,320 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:53:39,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:53:39,320 INFO L82 PathProgramCache]: Analyzing trace with hash 804664962, now seen corresponding path program 19 times [2021-02-19 18:53:39,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:53:39,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240976385] [2021-02-19 18:53:39,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:53:39,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:39,853 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:53:39,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240976385] [2021-02-19 18:53:39,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690076934] [2021-02-19 18:53:39,854 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 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 [2021-02-19 18:53:39,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:39,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:53:39,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:40,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:53:40,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:53:40,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-02-19 18:53:40,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:53:40,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:53:40,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:53:40,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-02-19 18:53:40,316 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:53:40,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:53:40,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:53:40,324 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:3 [2021-02-19 18:53:40,360 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:53:40,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:40,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-02-19 18:53:40,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412624352] [2021-02-19 18:53:40,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:53:40,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:40,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:53:40,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:53:40,362 INFO L87 Difference]: Start difference. First operand 2991 states and 9864 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 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) [2021-02-19 18:53:41,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:53:41,592 INFO L93 Difference]: Finished difference Result 3721 states and 12095 transitions. [2021-02-19 18:53:41,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 18:53:41,592 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 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 30 [2021-02-19 18:53:41,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:53:41,598 INFO L225 Difference]: With dead ends: 3721 [2021-02-19 18:53:41,598 INFO L226 Difference]: Without dead ends: 3706 [2021-02-19 18:53:41,598 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 18:53:41,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3706 states. [2021-02-19 18:53:41,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3706 to 3006. [2021-02-19 18:53:41,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3006 states, 3005 states have (on average 3.2985024958402662) internal successors, (9912), 3005 states have internal predecessors, (9912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:41,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3006 states to 3006 states and 9912 transitions. [2021-02-19 18:53:41,633 INFO L78 Accepts]: Start accepts. Automaton has 3006 states and 9912 transitions. Word has length 30 [2021-02-19 18:53:41,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:53:41,633 INFO L480 AbstractCegarLoop]: Abstraction has 3006 states and 9912 transitions. [2021-02-19 18:53:41,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 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) [2021-02-19 18:53:41,633 INFO L276 IsEmpty]: Start isEmpty. Operand 3006 states and 9912 transitions. [2021-02-19 18:53:41,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:53:41,637 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:53:41,637 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:53:41,838 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-02-19 18:53:41,838 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:53:41,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:53:41,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1674663190, now seen corresponding path program 20 times [2021-02-19 18:53:41,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:53:41,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857967582] [2021-02-19 18:53:41,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:53:41,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:42,116 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-02-19 18:53:42,382 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:53:42,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857967582] [2021-02-19 18:53:42,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432922119] [2021-02-19 18:53:42,383 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 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 [2021-02-19 18:53:42,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:53:42,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:53:42,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 18:53:42,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:42,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:53:42,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:53:42,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-02-19 18:53:42,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:53:42,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:53:42,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:53:42,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-02-19 18:53:42,756 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:53:42,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:53:42,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:53:42,764 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-02-19 18:53:42,797 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:53:42,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:42,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-02-19 18:53:42,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136486012] [2021-02-19 18:53:42,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:53:42,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:42,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:53:42,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:53:42,798 INFO L87 Difference]: Start difference. First operand 3006 states and 9912 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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) [2021-02-19 18:53:45,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:53:45,465 INFO L93 Difference]: Finished difference Result 3712 states and 12029 transitions. [2021-02-19 18:53:45,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 18:53:45,467 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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 30 [2021-02-19 18:53:45,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:53:45,473 INFO L225 Difference]: With dead ends: 3712 [2021-02-19 18:53:45,473 INFO L226 Difference]: Without dead ends: 3697 [2021-02-19 18:53:45,474 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=281, Invalid=1525, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 18:53:45,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3697 states. [2021-02-19 18:53:45,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3697 to 3006. [2021-02-19 18:53:45,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3006 states, 3005 states have (on average 3.2985024958402662) internal successors, (9912), 3005 states have internal predecessors, (9912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:45,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3006 states to 3006 states and 9912 transitions. [2021-02-19 18:53:45,522 INFO L78 Accepts]: Start accepts. Automaton has 3006 states and 9912 transitions. Word has length 30 [2021-02-19 18:53:45,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:53:45,522 INFO L480 AbstractCegarLoop]: Abstraction has 3006 states and 9912 transitions. [2021-02-19 18:53:45,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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) [2021-02-19 18:53:45,522 INFO L276 IsEmpty]: Start isEmpty. Operand 3006 states and 9912 transitions. [2021-02-19 18:53:45,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:53:45,526 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:53:45,526 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:53:45,726 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:53:45,726 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:53:45,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:53:45,727 INFO L82 PathProgramCache]: Analyzing trace with hash 101605186, now seen corresponding path program 21 times [2021-02-19 18:53:45,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:53:45,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001124569] [2021-02-19 18:53:45,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:53:45,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:45,976 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-02-19 18:53:46,308 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:53:46,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001124569] [2021-02-19 18:53:46,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853814612] [2021-02-19 18:53:46,308 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 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 [2021-02-19 18:53:46,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:53:46,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:53:46,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:53:46,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:46,654 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:53:46,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 47 [2021-02-19 18:53:46,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:53:46,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:53:46,730 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:53:46,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 42 [2021-02-19 18:53:46,743 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:53:46,788 INFO L354 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2021-02-19 18:53:46,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 60 [2021-02-19 18:53:46,798 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:53:46,879 INFO L628 ElimStorePlain]: treesize reduction 41, result has 62.0 percent of original size [2021-02-19 18:53:46,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:53:46,889 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:44, output treesize:109 [2021-02-19 18:53:47,020 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-02-19 18:53:47,213 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-02-19 18:53:47,260 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:53:47,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:47,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-02-19 18:53:47,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28755750] [2021-02-19 18:53:47,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:53:47,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:47,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:53:47,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:53:47,261 INFO L87 Difference]: Start difference. First operand 3006 states and 9912 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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) [2021-02-19 18:53:48,403 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 49 [2021-02-19 18:53:48,562 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 50 [2021-02-19 18:53:49,088 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2021-02-19 18:53:49,351 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2021-02-19 18:53:49,928 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2021-02-19 18:53:50,776 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 53 [2021-02-19 18:53:51,957 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-02-19 18:53:52,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:53:52,106 INFO L93 Difference]: Finished difference Result 4183 states and 13392 transitions. [2021-02-19 18:53:52,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-02-19 18:53:52,107 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:53:52,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:53:52,113 INFO L225 Difference]: With dead ends: 4183 [2021-02-19 18:53:52,113 INFO L226 Difference]: Without dead ends: 4168 [2021-02-19 18:53:52,114 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1084 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=578, Invalid=3204, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 18:53:52,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4168 states. [2021-02-19 18:53:52,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4168 to 3006. [2021-02-19 18:53:52,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3006 states, 3005 states have (on average 3.2985024958402662) internal successors, (9912), 3005 states have internal predecessors, (9912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:52,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3006 states to 3006 states and 9912 transitions. [2021-02-19 18:53:52,155 INFO L78 Accepts]: Start accepts. Automaton has 3006 states and 9912 transitions. Word has length 30 [2021-02-19 18:53:52,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:53:52,155 INFO L480 AbstractCegarLoop]: Abstraction has 3006 states and 9912 transitions. [2021-02-19 18:53:52,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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) [2021-02-19 18:53:52,156 INFO L276 IsEmpty]: Start isEmpty. Operand 3006 states and 9912 transitions. [2021-02-19 18:53:52,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:53:52,159 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:53:52,159 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:53:52,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-02-19 18:53:52,359 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:53:52,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:53:52,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1972265238, now seen corresponding path program 22 times [2021-02-19 18:53:52,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:53:52,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215097334] [2021-02-19 18:53:52,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:53:52,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:52,789 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:53:52,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215097334] [2021-02-19 18:53:52,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022029124] [2021-02-19 18:53:52,789 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 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 [2021-02-19 18:53:52,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:53:52,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:53:52,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:53:52,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:53,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:53:53,102 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:53:53,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2021-02-19 18:53:53,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:53:53,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:53:53,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:53:53,162 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-02-19 18:53:53,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2021-02-19 18:53:53,165 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:53:53,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 18:53:53,170 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:53:53,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:53:53,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:53:53,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:53:53,208 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:47, output treesize:56 [2021-02-19 18:53:53,352 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:53:53,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:53,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-02-19 18:53:53,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112580083] [2021-02-19 18:53:53,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:53:53,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:53,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:53:53,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:53:53,353 INFO L87 Difference]: Start difference. First operand 3006 states and 9912 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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) [2021-02-19 18:53:53,907 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-02-19 18:53:54,663 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2021-02-19 18:53:56,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:53:56,562 INFO L93 Difference]: Finished difference Result 4482 states and 14350 transitions. [2021-02-19 18:53:56,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 18:53:56,563 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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 30 [2021-02-19 18:53:56,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:53:56,570 INFO L225 Difference]: With dead ends: 4482 [2021-02-19 18:53:56,570 INFO L226 Difference]: Without dead ends: 4467 [2021-02-19 18:53:56,570 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1030 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=590, Invalid=2490, Unknown=0, NotChecked=0, Total=3080 [2021-02-19 18:53:56,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4467 states. [2021-02-19 18:53:56,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4467 to 3000. [2021-02-19 18:53:56,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3000 states, 2999 states have (on average 3.2960986995665222) internal successors, (9885), 2999 states have internal predecessors, (9885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:56,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3000 states to 3000 states and 9885 transitions. [2021-02-19 18:53:56,621 INFO L78 Accepts]: Start accepts. Automaton has 3000 states and 9885 transitions. Word has length 30 [2021-02-19 18:53:56,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:53:56,621 INFO L480 AbstractCegarLoop]: Abstraction has 3000 states and 9885 transitions. [2021-02-19 18:53:56,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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) [2021-02-19 18:53:56,621 INFO L276 IsEmpty]: Start isEmpty. Operand 3000 states and 9885 transitions. [2021-02-19 18:53:56,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:53:56,625 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:53:56,625 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:53:56,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-02-19 18:53:56,825 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:53:56,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:53:56,826 INFO L82 PathProgramCache]: Analyzing trace with hash -2078010192, now seen corresponding path program 23 times [2021-02-19 18:53:56,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:53:56,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094950801] [2021-02-19 18:53:56,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:53:56,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:53:57,107 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-02-19 18:53:57,265 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 28 [2021-02-19 18:53:57,415 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 29 [2021-02-19 18:53:57,558 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:53:57,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094950801] [2021-02-19 18:53:57,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281373164] [2021-02-19 18:53:57,558 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 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 [2021-02-19 18:53:57,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:53:57,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:53:57,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:53:57,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:53:57,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:53:57,816 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:53:57,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-02-19 18:53:57,819 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:53:57,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:53:57,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-02-19 18:53:57,834 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-02-19 18:53:57,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:53:57,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:53:57,845 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:15 [2021-02-19 18:53:57,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:53:57,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:53:57,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-02-19 18:53:57,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047002844] [2021-02-19 18:53:57,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:53:57,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:53:57,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:53:57,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:53:57,934 INFO L87 Difference]: Start difference. First operand 3000 states and 9885 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:53:59,955 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-02-19 18:54:00,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:00,865 INFO L93 Difference]: Finished difference Result 4461 states and 14434 transitions. [2021-02-19 18:54:00,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-02-19 18:54:00,866 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:54:00,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:00,873 INFO L225 Difference]: With dead ends: 4461 [2021-02-19 18:54:00,873 INFO L226 Difference]: Without dead ends: 4436 [2021-02-19 18:54:00,874 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=358, Invalid=2294, Unknown=0, NotChecked=0, Total=2652 [2021-02-19 18:54:00,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4436 states. [2021-02-19 18:54:00,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4436 to 2997. [2021-02-19 18:54:00,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2997 states, 2996 states have (on average 3.2953938584779707) internal successors, (9873), 2996 states have internal predecessors, (9873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:00,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2997 states to 2997 states and 9873 transitions. [2021-02-19 18:54:00,919 INFO L78 Accepts]: Start accepts. Automaton has 2997 states and 9873 transitions. Word has length 30 [2021-02-19 18:54:00,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:00,919 INFO L480 AbstractCegarLoop]: Abstraction has 2997 states and 9873 transitions. [2021-02-19 18:54:00,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:00,919 INFO L276 IsEmpty]: Start isEmpty. Operand 2997 states and 9873 transitions. [2021-02-19 18:54:00,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:54:00,923 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:00,923 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:01,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-02-19 18:54:01,123 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:01,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:01,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1323739780, now seen corresponding path program 24 times [2021-02-19 18:54:01,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:01,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570198798] [2021-02-19 18:54:01,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:01,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:01,693 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:01,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570198798] [2021-02-19 18:54:01,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640508502] [2021-02-19 18:54:01,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 18:54:01,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:54:01,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:54:01,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:54:01,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:02,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:54:02,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:54:02,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:54:02,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:54:02,031 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:02,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 33 [2021-02-19 18:54:02,033 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:54:02,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:02,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:54:02,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:54:02,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-02-19 18:54:02,050 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-02-19 18:54:02,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:02,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:54:02,062 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:17 [2021-02-19 18:54:02,131 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:02,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:02,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-02-19 18:54:02,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114423285] [2021-02-19 18:54:02,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:54:02,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:02,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:54:02,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:54:02,132 INFO L87 Difference]: Start difference. First operand 2997 states and 9873 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:02,809 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-02-19 18:54:05,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:05,583 INFO L93 Difference]: Finished difference Result 4442 states and 14293 transitions. [2021-02-19 18:54:05,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-19 18:54:05,584 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:54:05,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:05,591 INFO L225 Difference]: With dead ends: 4442 [2021-02-19 18:54:05,591 INFO L226 Difference]: Without dead ends: 4402 [2021-02-19 18:54:05,591 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=320, Invalid=2542, Unknown=0, NotChecked=0, Total=2862 [2021-02-19 18:54:05,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4402 states. [2021-02-19 18:54:05,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4402 to 2964. [2021-02-19 18:54:05,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2964 states, 2963 states have (on average 3.293958825514681) internal successors, (9760), 2963 states have internal predecessors, (9760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:05,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2964 states to 2964 states and 9760 transitions. [2021-02-19 18:54:05,654 INFO L78 Accepts]: Start accepts. Automaton has 2964 states and 9760 transitions. Word has length 30 [2021-02-19 18:54:05,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:05,654 INFO L480 AbstractCegarLoop]: Abstraction has 2964 states and 9760 transitions. [2021-02-19 18:54:05,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:05,654 INFO L276 IsEmpty]: Start isEmpty. Operand 2964 states and 9760 transitions. [2021-02-19 18:54:05,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:54:05,657 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:05,657 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:05,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:54:05,858 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:05,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:05,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1502102616, now seen corresponding path program 25 times [2021-02-19 18:54:05,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:05,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557205540] [2021-02-19 18:54:05,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:05,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:06,395 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:06,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557205540] [2021-02-19 18:54:06,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745984316] [2021-02-19 18:54:06,395 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 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 [2021-02-19 18:54:06,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:06,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:54:06,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:06,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:54:06,706 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:06,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2021-02-19 18:54:06,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:54:06,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:06,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:54:06,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 18:54:06,744 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:54:06,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:06,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:54:06,777 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-02-19 18:54:06,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2021-02-19 18:54:06,780 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:54:06,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:06,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:54:06,816 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:47, output treesize:56 [2021-02-19 18:54:06,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:06,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:06,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-02-19 18:54:06,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025283867] [2021-02-19 18:54:06,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:54:06,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:06,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:54:06,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:54:06,966 INFO L87 Difference]: Start difference. First operand 2964 states and 9760 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:07,361 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2021-02-19 18:54:08,109 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2021-02-19 18:54:09,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:09,395 INFO L93 Difference]: Finished difference Result 4741 states and 15190 transitions. [2021-02-19 18:54:09,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 18:54:09,396 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:54:09,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:09,403 INFO L225 Difference]: With dead ends: 4741 [2021-02-19 18:54:09,403 INFO L226 Difference]: Without dead ends: 4716 [2021-02-19 18:54:09,403 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=341, Invalid=1551, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 18:54:09,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4716 states. [2021-02-19 18:54:09,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4716 to 3000. [2021-02-19 18:54:09,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3000 states, 2999 states have (on average 3.2974324774924977) internal successors, (9889), 2999 states have internal predecessors, (9889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:09,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3000 states to 3000 states and 9889 transitions. [2021-02-19 18:54:09,447 INFO L78 Accepts]: Start accepts. Automaton has 3000 states and 9889 transitions. Word has length 30 [2021-02-19 18:54:09,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:09,447 INFO L480 AbstractCegarLoop]: Abstraction has 3000 states and 9889 transitions. [2021-02-19 18:54:09,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:09,447 INFO L276 IsEmpty]: Start isEmpty. Operand 3000 states and 9889 transitions. [2021-02-19 18:54:09,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:54:09,450 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:09,450 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:09,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:54:09,651 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:09,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:09,651 INFO L82 PathProgramCache]: Analyzing trace with hash 372708760, now seen corresponding path program 26 times [2021-02-19 18:54:09,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:09,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472205105] [2021-02-19 18:54:09,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:09,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:10,302 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:10,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472205105] [2021-02-19 18:54:10,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322302698] [2021-02-19 18:54:10,302 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 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 [2021-02-19 18:54:10,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:54:10,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:54:10,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:54:10,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:10,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:54:10,626 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:10,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-02-19 18:54:10,629 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:54:10,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:10,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-02-19 18:54:10,650 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-02-19 18:54:10,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:10,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:54:10,664 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:15 [2021-02-19 18:54:10,906 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:10,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:10,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-02-19 18:54:10,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935776727] [2021-02-19 18:54:10,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:54:10,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:10,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:54:10,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:54:10,907 INFO L87 Difference]: Start difference. First operand 3000 states and 9889 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:11,734 WARN L202 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-02-19 18:54:11,923 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 31 [2021-02-19 18:54:12,638 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-02-19 18:54:14,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:14,964 INFO L93 Difference]: Finished difference Result 4444 states and 14408 transitions. [2021-02-19 18:54:14,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 18:54:14,965 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:54:14,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:14,972 INFO L225 Difference]: With dead ends: 4444 [2021-02-19 18:54:14,972 INFO L226 Difference]: Without dead ends: 4394 [2021-02-19 18:54:14,973 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=424, Invalid=2768, Unknown=0, NotChecked=0, Total=3192 [2021-02-19 18:54:14,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4394 states. [2021-02-19 18:54:15,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4394 to 3003. [2021-02-19 18:54:15,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3003 states, 3002 states have (on average 3.297135243171219) internal successors, (9898), 3002 states have internal predecessors, (9898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:15,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 9898 transitions. [2021-02-19 18:54:15,016 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 9898 transitions. Word has length 30 [2021-02-19 18:54:15,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:15,016 INFO L480 AbstractCegarLoop]: Abstraction has 3003 states and 9898 transitions. [2021-02-19 18:54:15,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:15,016 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 9898 transitions. [2021-02-19 18:54:15,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:54:15,019 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:15,019 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:15,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:54:15,220 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:15,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:15,220 INFO L82 PathProgramCache]: Analyzing trace with hash -679268830, now seen corresponding path program 27 times [2021-02-19 18:54:15,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:15,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106096393] [2021-02-19 18:54:15,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:15,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:15,881 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:15,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106096393] [2021-02-19 18:54:15,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338405684] [2021-02-19 18:54:15,882 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 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 [2021-02-19 18:54:15,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:54:15,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:54:15,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-02-19 18:54:15,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:16,287 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:16,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2021-02-19 18:54:16,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:54:16,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:16,370 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-02-19 18:54:16,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2021-02-19 18:54:16,373 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:54:16,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 18:54:16,381 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:54:16,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:16,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:16,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:54:16,437 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:42, output treesize:36 [2021-02-19 18:54:16,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:16,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:16,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 25 [2021-02-19 18:54:16,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504981794] [2021-02-19 18:54:16,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:54:16,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:16,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:54:16,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:54:16,786 INFO L87 Difference]: Start difference. First operand 3003 states and 9898 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:17,910 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-02-19 18:54:19,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:19,615 INFO L93 Difference]: Finished difference Result 3832 states and 12398 transitions. [2021-02-19 18:54:19,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-02-19 18:54:19,616 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:54:19,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:19,622 INFO L225 Difference]: With dead ends: 3832 [2021-02-19 18:54:19,622 INFO L226 Difference]: Without dead ends: 3817 [2021-02-19 18:54:19,622 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=306, Invalid=2346, Unknown=0, NotChecked=0, Total=2652 [2021-02-19 18:54:19,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3817 states. [2021-02-19 18:54:19,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3817 to 3012. [2021-02-19 18:54:19,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3012 states, 3011 states have (on average 3.2972434407173696) internal successors, (9928), 3011 states have internal predecessors, (9928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:19,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3012 states to 3012 states and 9928 transitions. [2021-02-19 18:54:19,666 INFO L78 Accepts]: Start accepts. Automaton has 3012 states and 9928 transitions. Word has length 30 [2021-02-19 18:54:19,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:19,666 INFO L480 AbstractCegarLoop]: Abstraction has 3012 states and 9928 transitions. [2021-02-19 18:54:19,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:19,666 INFO L276 IsEmpty]: Start isEmpty. Operand 3012 states and 9928 transitions. [2021-02-19 18:54:19,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:54:19,670 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:19,670 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:19,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:54:19,872 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:19,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:19,873 INFO L82 PathProgramCache]: Analyzing trace with hash 2042640462, now seen corresponding path program 28 times [2021-02-19 18:54:19,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:19,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223176804] [2021-02-19 18:54:19,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:19,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:20,477 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:20,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223176804] [2021-02-19 18:54:20,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383513174] [2021-02-19 18:54:20,478 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 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 [2021-02-19 18:54:20,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:54:20,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:54:20,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:54:20,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:20,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:54:20,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:54:20,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-02-19 18:54:20,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:54:20,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:20,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:54:20,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-02-19 18:54:20,907 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:54:20,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:20,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:54:20,917 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:3 [2021-02-19 18:54:20,950 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:20,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:20,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-02-19 18:54:20,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727762543] [2021-02-19 18:54:20,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:54:20,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:20,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:54:20,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:54:20,951 INFO L87 Difference]: Start difference. First operand 3012 states and 9928 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:23,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:23,205 INFO L93 Difference]: Finished difference Result 4064 states and 13103 transitions. [2021-02-19 18:54:23,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 18:54:23,207 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:54:23,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:23,213 INFO L225 Difference]: With dead ends: 4064 [2021-02-19 18:54:23,213 INFO L226 Difference]: Without dead ends: 4043 [2021-02-19 18:54:23,214 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=332, Invalid=1560, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 18:54:23,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4043 states. [2021-02-19 18:54:23,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4043 to 3075. [2021-02-19 18:54:23,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3075 states, 3074 states have (on average 3.2989590110605076) internal successors, (10141), 3074 states have internal predecessors, (10141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:23,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3075 states to 3075 states and 10141 transitions. [2021-02-19 18:54:23,269 INFO L78 Accepts]: Start accepts. Automaton has 3075 states and 10141 transitions. Word has length 30 [2021-02-19 18:54:23,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:23,269 INFO L480 AbstractCegarLoop]: Abstraction has 3075 states and 10141 transitions. [2021-02-19 18:54:23,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:23,269 INFO L276 IsEmpty]: Start isEmpty. Operand 3075 states and 10141 transitions. [2021-02-19 18:54:23,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:54:23,273 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:23,273 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:23,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-02-19 18:54:23,474 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:23,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:23,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1460701740, now seen corresponding path program 29 times [2021-02-19 18:54:23,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:23,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975646178] [2021-02-19 18:54:23,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:23,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:24,107 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:24,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975646178] [2021-02-19 18:54:24,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367685959] [2021-02-19 18:54:24,107 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 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 [2021-02-19 18:54:24,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:54:24,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:54:24,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:54:24,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:24,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:54:24,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:54:24,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-02-19 18:54:24,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:54:24,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:24,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:54:24,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-02-19 18:54:24,453 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:54:24,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:24,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:54:24,463 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:52, output treesize:7 [2021-02-19 18:54:24,510 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:24,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:24,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-02-19 18:54:24,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369548569] [2021-02-19 18:54:24,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 18:54:24,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:24,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 18:54:24,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-02-19 18:54:24,511 INFO L87 Difference]: Start difference. First operand 3075 states and 10141 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) [2021-02-19 18:54:25,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:25,667 INFO L93 Difference]: Finished difference Result 3852 states and 12539 transitions. [2021-02-19 18:54:25,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 18:54:25,668 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 30 [2021-02-19 18:54:25,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:25,674 INFO L225 Difference]: With dead ends: 3852 [2021-02-19 18:54:25,674 INFO L226 Difference]: Without dead ends: 3833 [2021-02-19 18:54:25,674 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:54:25,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3833 states. [2021-02-19 18:54:25,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3833 to 3087. [2021-02-19 18:54:25,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3087 states, 3086 states have (on average 3.3036292935839273) internal successors, (10195), 3086 states have internal predecessors, (10195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:25,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3087 states to 3087 states and 10195 transitions. [2021-02-19 18:54:25,715 INFO L78 Accepts]: Start accepts. Automaton has 3087 states and 10195 transitions. Word has length 30 [2021-02-19 18:54:25,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:25,715 INFO L480 AbstractCegarLoop]: Abstraction has 3087 states and 10195 transitions. [2021-02-19 18:54:25,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) [2021-02-19 18:54:25,715 INFO L276 IsEmpty]: Start isEmpty. Operand 3087 states and 10195 transitions. [2021-02-19 18:54:25,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:54:25,719 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:25,719 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:25,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-02-19 18:54:25,919 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:25,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:25,919 INFO L82 PathProgramCache]: Analyzing trace with hash -274070036, now seen corresponding path program 30 times [2021-02-19 18:54:25,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:25,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49295551] [2021-02-19 18:54:25,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:25,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:26,514 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:26,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49295551] [2021-02-19 18:54:26,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058549059] [2021-02-19 18:54:26,514 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 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 [2021-02-19 18:54:26,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:54:26,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:54:26,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-02-19 18:54:26,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:27,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:54:27,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:54:27,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:54:27,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:54:27,129 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:27,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 33 [2021-02-19 18:54:27,135 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:54:27,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:27,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:54:27,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:54:27,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-02-19 18:54:27,180 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-02-19 18:54:27,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:27,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:54:27,211 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:51, output treesize:25 [2021-02-19 18:54:27,450 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:27,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:27,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-02-19 18:54:27,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818858915] [2021-02-19 18:54:27,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:54:27,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:27,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:54:27,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:54:27,451 INFO L87 Difference]: Start difference. First operand 3087 states and 10195 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2021-02-19 18:54:27,830 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2021-02-19 18:54:28,236 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-02-19 18:54:28,461 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-02-19 18:54:28,875 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-02-19 18:54:31,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:31,617 INFO L93 Difference]: Finished difference Result 5046 states and 15976 transitions. [2021-02-19 18:54:31,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 18:54:31,619 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 30 [2021-02-19 18:54:31,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:31,628 INFO L225 Difference]: With dead ends: 5046 [2021-02-19 18:54:31,628 INFO L226 Difference]: Without dead ends: 4991 [2021-02-19 18:54:31,629 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=492, Invalid=2264, Unknown=0, NotChecked=0, Total=2756 [2021-02-19 18:54:31,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4991 states. [2021-02-19 18:54:31,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4991 to 3146. [2021-02-19 18:54:31,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3146 states, 3145 states have (on average 3.305564387917329) internal successors, (10396), 3145 states have internal predecessors, (10396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:31,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3146 states to 3146 states and 10396 transitions. [2021-02-19 18:54:31,698 INFO L78 Accepts]: Start accepts. Automaton has 3146 states and 10396 transitions. Word has length 30 [2021-02-19 18:54:31,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:31,698 INFO L480 AbstractCegarLoop]: Abstraction has 3146 states and 10396 transitions. [2021-02-19 18:54:31,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2021-02-19 18:54:31,698 INFO L276 IsEmpty]: Start isEmpty. Operand 3146 states and 10396 transitions. [2021-02-19 18:54:31,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:54:31,702 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:31,702 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:31,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:54:31,903 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:31,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:31,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1774565374, now seen corresponding path program 31 times [2021-02-19 18:54:31,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:31,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519388619] [2021-02-19 18:54:31,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:31,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:32,524 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:32,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519388619] [2021-02-19 18:54:32,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114580816] [2021-02-19 18:54:32,524 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 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 [2021-02-19 18:54:32,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:32,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:54:32,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:32,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:54:32,885 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:32,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2021-02-19 18:54:32,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:54:32,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:32,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:54:32,955 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-02-19 18:54:32,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2021-02-19 18:54:32,958 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:54:32,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 18:54:32,964 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:54:32,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:33,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:33,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 18:54:33,013 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:47, output treesize:59 [2021-02-19 18:54:33,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:33,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:33,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-02-19 18:54:33,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237270462] [2021-02-19 18:54:33,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:54:33,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:33,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:54:33,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:54:33,184 INFO L87 Difference]: Start difference. First operand 3146 states and 10396 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-02-19 18:54:33,654 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-02-19 18:54:34,078 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-02-19 18:54:34,490 WARN L202 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-02-19 18:54:34,878 WARN L202 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-02-19 18:54:35,468 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2021-02-19 18:54:35,631 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-02-19 18:54:35,994 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2021-02-19 18:54:37,731 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-02-19 18:54:37,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:37,966 INFO L93 Difference]: Finished difference Result 4910 states and 15768 transitions. [2021-02-19 18:54:37,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-19 18:54:37,968 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 30 [2021-02-19 18:54:37,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:37,975 INFO L225 Difference]: With dead ends: 4910 [2021-02-19 18:54:37,975 INFO L226 Difference]: Without dead ends: 4870 [2021-02-19 18:54:37,975 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=491, Invalid=1959, Unknown=0, NotChecked=0, Total=2450 [2021-02-19 18:54:37,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4870 states. [2021-02-19 18:54:38,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4870 to 3117. [2021-02-19 18:54:38,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3117 states, 3116 states have (on average 3.298780487804878) internal successors, (10279), 3116 states have internal predecessors, (10279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:38,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3117 states to 3117 states and 10279 transitions. [2021-02-19 18:54:38,024 INFO L78 Accepts]: Start accepts. Automaton has 3117 states and 10279 transitions. Word has length 30 [2021-02-19 18:54:38,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:38,024 INFO L480 AbstractCegarLoop]: Abstraction has 3117 states and 10279 transitions. [2021-02-19 18:54:38,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-02-19 18:54:38,024 INFO L276 IsEmpty]: Start isEmpty. Operand 3117 states and 10279 transitions. [2021-02-19 18:54:38,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:54:38,027 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:38,028 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:38,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-02-19 18:54:38,228 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:38,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:38,228 INFO L82 PathProgramCache]: Analyzing trace with hash 87027730, now seen corresponding path program 32 times [2021-02-19 18:54:38,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:38,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519712872] [2021-02-19 18:54:38,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:38,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:38,986 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:38,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519712872] [2021-02-19 18:54:38,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268354390] [2021-02-19 18:54:38,986 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 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 [2021-02-19 18:54:39,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:54:39,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:54:39,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:54:39,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:39,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:54:39,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:54:39,380 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:39,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2021-02-19 18:54:39,383 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:54:39,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:39,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 18:54:39,403 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:54:39,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:39,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:54:39,417 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:17 [2021-02-19 18:54:39,520 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:39,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:39,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-02-19 18:54:39,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577412895] [2021-02-19 18:54:39,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:54:39,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:39,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:54:39,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:54:39,521 INFO L87 Difference]: Start difference. First operand 3117 states and 10279 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:43,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:43,280 INFO L93 Difference]: Finished difference Result 4853 states and 15584 transitions. [2021-02-19 18:54:43,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 18:54:43,281 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:54:43,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:43,288 INFO L225 Difference]: With dead ends: 4853 [2021-02-19 18:54:43,288 INFO L226 Difference]: Without dead ends: 4803 [2021-02-19 18:54:43,289 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=467, Invalid=2955, Unknown=0, NotChecked=0, Total=3422 [2021-02-19 18:54:43,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4803 states. [2021-02-19 18:54:43,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4803 to 3128. [2021-02-19 18:54:43,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3128 states, 3127 states have (on average 3.295490885833067) internal successors, (10305), 3127 states have internal predecessors, (10305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:43,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 10305 transitions. [2021-02-19 18:54:43,336 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 10305 transitions. Word has length 30 [2021-02-19 18:54:43,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:43,336 INFO L480 AbstractCegarLoop]: Abstraction has 3128 states and 10305 transitions. [2021-02-19 18:54:43,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:43,336 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 10305 transitions. [2021-02-19 18:54:43,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:54:43,339 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:43,339 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:43,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:54:43,542 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:43,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:43,542 INFO L82 PathProgramCache]: Analyzing trace with hash -109421332, now seen corresponding path program 33 times [2021-02-19 18:54:43,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:43,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251607142] [2021-02-19 18:54:43,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:43,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:44,249 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:44,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251607142] [2021-02-19 18:54:44,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7713975] [2021-02-19 18:54:44,250 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 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 [2021-02-19 18:54:44,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:54:44,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:54:44,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 18:54:44,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:44,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:54:44,853 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:44,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 51 [2021-02-19 18:54:44,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:54:44,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:44,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:54:44,942 INFO L354 Elim1Store]: treesize reduction 11, result has 42.1 percent of original size [2021-02-19 18:54:44,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 30 [2021-02-19 18:54:44,944 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:54:44,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 18:54:44,951 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:54:44,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:44,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:44,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:54:44,995 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:59, output treesize:60 [2021-02-19 18:54:45,260 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:45,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:45,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 27 [2021-02-19 18:54:45,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916776430] [2021-02-19 18:54:45,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:54:45,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:45,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:54:45,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:54:45,261 INFO L87 Difference]: Start difference. First operand 3128 states and 10305 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:48,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:48,406 INFO L93 Difference]: Finished difference Result 3552 states and 11482 transitions. [2021-02-19 18:54:48,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-19 18:54:48,408 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:54:48,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:48,413 INFO L225 Difference]: With dead ends: 3552 [2021-02-19 18:54:48,413 INFO L226 Difference]: Without dead ends: 3518 [2021-02-19 18:54:48,414 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=300, Invalid=2352, Unknown=0, NotChecked=0, Total=2652 [2021-02-19 18:54:48,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3518 states. [2021-02-19 18:54:48,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3518 to 3159. [2021-02-19 18:54:48,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3159 states, 3158 states have (on average 3.292273590880304) internal successors, (10397), 3158 states have internal predecessors, (10397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:48,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3159 states to 3159 states and 10397 transitions. [2021-02-19 18:54:48,456 INFO L78 Accepts]: Start accepts. Automaton has 3159 states and 10397 transitions. Word has length 30 [2021-02-19 18:54:48,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:48,456 INFO L480 AbstractCegarLoop]: Abstraction has 3159 states and 10397 transitions. [2021-02-19 18:54:48,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:48,456 INFO L276 IsEmpty]: Start isEmpty. Operand 3159 states and 10397 transitions. [2021-02-19 18:54:48,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:54:48,460 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:48,460 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:48,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:54:48,662 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:48,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:48,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1689581996, now seen corresponding path program 34 times [2021-02-19 18:54:48,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:48,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833533022] [2021-02-19 18:54:48,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:48,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:49,310 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:49,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833533022] [2021-02-19 18:54:49,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740549539] [2021-02-19 18:54:49,310 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 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 [2021-02-19 18:54:49,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:54:49,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:54:49,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:54:49,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:49,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:54:49,680 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:49,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2021-02-19 18:54:49,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:54:49,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:49,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:54:49,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 18:54:49,725 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:54:49,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:49,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:54:49,764 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-02-19 18:54:49,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2021-02-19 18:54:49,767 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:54:49,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:49,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:54:49,800 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:44 [2021-02-19 18:54:50,041 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:50,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:50,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 23 [2021-02-19 18:54:50,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176076032] [2021-02-19 18:54:50,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:54:50,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:50,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:54:50,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:54:50,042 INFO L87 Difference]: Start difference. First operand 3159 states and 10397 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-02-19 18:54:50,218 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 32 [2021-02-19 18:54:50,447 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-02-19 18:54:51,052 WARN L202 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-02-19 18:54:51,483 WARN L202 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-02-19 18:54:51,805 WARN L202 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-02-19 18:54:52,133 WARN L202 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2021-02-19 18:54:52,767 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 33 [2021-02-19 18:54:52,929 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-02-19 18:54:53,473 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-02-19 18:54:54,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:54,577 INFO L93 Difference]: Finished difference Result 4568 states and 14746 transitions. [2021-02-19 18:54:54,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-19 18:54:54,579 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 30 [2021-02-19 18:54:54,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:54,586 INFO L225 Difference]: With dead ends: 4568 [2021-02-19 18:54:54,586 INFO L226 Difference]: Without dead ends: 4543 [2021-02-19 18:54:54,587 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=501, Invalid=2049, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 18:54:54,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4543 states. [2021-02-19 18:54:54,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4543 to 3163. [2021-02-19 18:54:54,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3163 states, 3162 states have (on average 3.2944339025932954) internal successors, (10417), 3162 states have internal predecessors, (10417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:54,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3163 states to 3163 states and 10417 transitions. [2021-02-19 18:54:54,640 INFO L78 Accepts]: Start accepts. Automaton has 3163 states and 10417 transitions. Word has length 30 [2021-02-19 18:54:54,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:54,640 INFO L480 AbstractCegarLoop]: Abstraction has 3163 states and 10417 transitions. [2021-02-19 18:54:54,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-02-19 18:54:54,640 INFO L276 IsEmpty]: Start isEmpty. Operand 3163 states and 10417 transitions. [2021-02-19 18:54:54,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:54:54,645 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:54,645 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:54,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:54:54,845 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:54,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:54,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1594721900, now seen corresponding path program 35 times [2021-02-19 18:54:54,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:54,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780930327] [2021-02-19 18:54:54,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:54,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:55,152 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-02-19 18:54:55,479 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:55,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780930327] [2021-02-19 18:54:55,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344104692] [2021-02-19 18:54:55,479 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 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 [2021-02-19 18:54:55,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:54:55,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:54:55,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:54:55,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:54:55,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:54:55,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:54:55,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-02-19 18:54:55,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:54:56,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:56,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:54:56,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-02-19 18:54:56,016 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:54:56,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:54:56,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:54:56,026 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-02-19 18:54:56,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:56,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:54:56,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-02-19 18:54:56,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219210585] [2021-02-19 18:54:56,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:54:56,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:54:56,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:54:56,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:54:56,069 INFO L87 Difference]: Start difference. First operand 3163 states and 10417 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2021-02-19 18:54:56,928 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-02-19 18:54:57,581 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-02-19 18:54:58,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:54:58,432 INFO L93 Difference]: Finished difference Result 3973 states and 12907 transitions. [2021-02-19 18:54:58,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 18:54:58,435 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 30 [2021-02-19 18:54:58,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:54:58,442 INFO L225 Difference]: With dead ends: 3973 [2021-02-19 18:54:58,442 INFO L226 Difference]: Without dead ends: 3958 [2021-02-19 18:54:58,442 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=260, Invalid=1300, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 18:54:58,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3958 states. [2021-02-19 18:54:58,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3958 to 3182. [2021-02-19 18:54:58,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3182 states, 3181 states have (on average 3.2948758252121975) internal successors, (10481), 3181 states have internal predecessors, (10481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:54:58,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3182 states to 3182 states and 10481 transitions. [2021-02-19 18:54:58,494 INFO L78 Accepts]: Start accepts. Automaton has 3182 states and 10481 transitions. Word has length 30 [2021-02-19 18:54:58,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:54:58,494 INFO L480 AbstractCegarLoop]: Abstraction has 3182 states and 10481 transitions. [2021-02-19 18:54:58,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2021-02-19 18:54:58,494 INFO L276 IsEmpty]: Start isEmpty. Operand 3182 states and 10481 transitions. [2021-02-19 18:54:58,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:54:58,499 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:54:58,499 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:54:58,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:54:58,699 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:54:58,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:54:58,700 INFO L82 PathProgramCache]: Analyzing trace with hash -894697260, now seen corresponding path program 36 times [2021-02-19 18:54:58,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:54:58,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999769110] [2021-02-19 18:54:58,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:54:58,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:54:58,972 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2021-02-19 18:54:59,107 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-02-19 18:54:59,229 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 28 [2021-02-19 18:54:59,383 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-02-19 18:54:59,618 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:54:59,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999769110] [2021-02-19 18:54:59,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651061103] [2021-02-19 18:54:59,618 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 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 [2021-02-19 18:54:59,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:54:59,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:54:59,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:54:59,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:55:00,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:55:00,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:55:00,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:00,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-02-19 18:55:00,046 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:55:00,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:00,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-02-19 18:55:00,067 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:55:00,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:00,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:55:00,083 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:17 [2021-02-19 18:55:00,226 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:00,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:55:00,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-02-19 18:55:00,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578371904] [2021-02-19 18:55:00,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:55:00,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:55:00,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:55:00,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:55:00,227 INFO L87 Difference]: Start difference. First operand 3182 states and 10481 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:00,852 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-02-19 18:55:00,982 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 34 [2021-02-19 18:55:01,459 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-02-19 18:55:02,187 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-02-19 18:55:02,653 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-02-19 18:55:03,542 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-02-19 18:55:03,747 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-02-19 18:55:04,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:55:04,480 INFO L93 Difference]: Finished difference Result 4778 states and 15468 transitions. [2021-02-19 18:55:04,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 18:55:04,482 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:55:04,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:55:04,489 INFO L225 Difference]: With dead ends: 4778 [2021-02-19 18:55:04,489 INFO L226 Difference]: Without dead ends: 4753 [2021-02-19 18:55:04,490 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=436, Invalid=2534, Unknown=0, NotChecked=0, Total=2970 [2021-02-19 18:55:04,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4753 states. [2021-02-19 18:55:04,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4753 to 3171. [2021-02-19 18:55:04,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3171 states, 3170 states have (on average 3.2936908517350156) internal successors, (10441), 3170 states have internal predecessors, (10441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:04,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3171 states to 3171 states and 10441 transitions. [2021-02-19 18:55:04,540 INFO L78 Accepts]: Start accepts. Automaton has 3171 states and 10441 transitions. Word has length 30 [2021-02-19 18:55:04,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:55:04,540 INFO L480 AbstractCegarLoop]: Abstraction has 3171 states and 10441 transitions. [2021-02-19 18:55:04,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:04,541 INFO L276 IsEmpty]: Start isEmpty. Operand 3171 states and 10441 transitions. [2021-02-19 18:55:04,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:55:04,545 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:55:04,545 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:55:04,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:55:04,756 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:55:04,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:55:04,756 INFO L82 PathProgramCache]: Analyzing trace with hash -55546536, now seen corresponding path program 37 times [2021-02-19 18:55:04,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:55:04,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292278162] [2021-02-19 18:55:04,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:55:04,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:55:05,110 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-02-19 18:55:05,243 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 29 [2021-02-19 18:55:05,493 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:05,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292278162] [2021-02-19 18:55:05,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143189562] [2021-02-19 18:55:05,493 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 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 [2021-02-19 18:55:05,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:55:05,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:55:05,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:55:05,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:55:05,872 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:05,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2021-02-19 18:55:05,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:55:05,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:05,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:55:05,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 18:55:05,954 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:55:05,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:05,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:55:06,024 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-02-19 18:55:06,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2021-02-19 18:55:06,027 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:55:06,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:06,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:55:06,095 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:44 [2021-02-19 18:55:06,464 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-02-19 18:55:06,573 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:06,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:55:06,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-02-19 18:55:06,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043496376] [2021-02-19 18:55:06,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:55:06,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:55:06,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:55:06,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:55:06,574 INFO L87 Difference]: Start difference. First operand 3171 states and 10441 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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) [2021-02-19 18:55:06,933 WARN L202 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 31 [2021-02-19 18:55:07,409 WARN L202 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-02-19 18:55:07,574 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 23 [2021-02-19 18:55:07,863 WARN L202 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 36 [2021-02-19 18:55:08,650 WARN L202 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-02-19 18:55:09,035 WARN L202 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2021-02-19 18:55:10,105 WARN L202 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-02-19 18:55:10,463 WARN L202 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2021-02-19 18:55:10,982 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-02-19 18:55:11,160 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2021-02-19 18:55:11,376 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-02-19 18:55:12,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:55:12,292 INFO L93 Difference]: Finished difference Result 4507 states and 14595 transitions. [2021-02-19 18:55:12,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 18:55:12,294 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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 30 [2021-02-19 18:55:12,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:55:12,302 INFO L225 Difference]: With dead ends: 4507 [2021-02-19 18:55:12,302 INFO L226 Difference]: Without dead ends: 4482 [2021-02-19 18:55:12,302 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=390, Invalid=1680, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 18:55:12,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4482 states. [2021-02-19 18:55:12,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4482 to 3179. [2021-02-19 18:55:12,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3179 states, 3178 states have (on average 3.29295154185022) internal successors, (10465), 3178 states have internal predecessors, (10465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:12,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3179 states to 3179 states and 10465 transitions. [2021-02-19 18:55:12,368 INFO L78 Accepts]: Start accepts. Automaton has 3179 states and 10465 transitions. Word has length 30 [2021-02-19 18:55:12,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:55:12,368 INFO L480 AbstractCegarLoop]: Abstraction has 3179 states and 10465 transitions. [2021-02-19 18:55:12,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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) [2021-02-19 18:55:12,368 INFO L276 IsEmpty]: Start isEmpty. Operand 3179 states and 10465 transitions. [2021-02-19 18:55:12,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:55:12,372 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:55:12,372 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:55:12,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:55:12,572 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:55:12,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:55:12,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1228760081, now seen corresponding path program 44 times [2021-02-19 18:55:12,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:55:12,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327549997] [2021-02-19 18:55:12,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:55:12,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:55:12,837 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2021-02-19 18:55:13,477 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:13,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327549997] [2021-02-19 18:55:13,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960352573] [2021-02-19 18:55:13,478 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 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 [2021-02-19 18:55:13,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:55:13,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:55:13,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:55:13,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:55:13,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:55:13,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:55:13,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:55:13,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:55:13,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-02-19 18:55:13,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:55:13,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:13,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:55:14,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:55:14,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:55:14,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:55:14,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-02-19 18:55:14,006 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:55:14,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:14,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:55:14,016 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-02-19 18:55:14,074 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:14,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:55:14,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-02-19 18:55:14,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393865959] [2021-02-19 18:55:14,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:55:14,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:55:14,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:55:14,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:55:14,075 INFO L87 Difference]: Start difference. First operand 3179 states and 10465 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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) [2021-02-19 18:55:15,611 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-02-19 18:55:15,885 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-02-19 18:55:16,043 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-02-19 18:55:16,280 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 28 [2021-02-19 18:55:17,022 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 33 [2021-02-19 18:55:17,263 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 32 [2021-02-19 18:55:17,679 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-02-19 18:55:18,022 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-02-19 18:55:18,248 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-02-19 18:55:18,496 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-02-19 18:55:18,935 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2021-02-19 18:55:20,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:55:20,180 INFO L93 Difference]: Finished difference Result 4195 states and 13420 transitions. [2021-02-19 18:55:20,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 18:55:20,182 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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 30 [2021-02-19 18:55:20,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:55:20,190 INFO L225 Difference]: With dead ends: 4195 [2021-02-19 18:55:20,190 INFO L226 Difference]: Without dead ends: 4169 [2021-02-19 18:55:20,190 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=481, Invalid=3179, Unknown=0, NotChecked=0, Total=3660 [2021-02-19 18:55:20,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4169 states. [2021-02-19 18:55:20,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4169 to 3173. [2021-02-19 18:55:20,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3173 states, 3172 states have (on average 3.2944514501891553) internal successors, (10450), 3172 states have internal predecessors, (10450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:20,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3173 states to 3173 states and 10450 transitions. [2021-02-19 18:55:20,263 INFO L78 Accepts]: Start accepts. Automaton has 3173 states and 10450 transitions. Word has length 30 [2021-02-19 18:55:20,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:55:20,263 INFO L480 AbstractCegarLoop]: Abstraction has 3173 states and 10450 transitions. [2021-02-19 18:55:20,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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) [2021-02-19 18:55:20,263 INFO L276 IsEmpty]: Start isEmpty. Operand 3173 states and 10450 transitions. [2021-02-19 18:55:20,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:55:20,267 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:55:20,267 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:55:20,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-02-19 18:55:20,468 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:55:20,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:55:20,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1051720055, now seen corresponding path program 45 times [2021-02-19 18:55:20,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:55:20,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095659908] [2021-02-19 18:55:20,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:55:20,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:55:20,722 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2021-02-19 18:55:21,396 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:21,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095659908] [2021-02-19 18:55:21,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167466822] [2021-02-19 18:55:21,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 18:55:21,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:55:21,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:55:21,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 18:55:21,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:55:22,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:55:22,343 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-02-19 18:55:22,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 165 treesize of output 141 [2021-02-19 18:55:22,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:55:22,376 INFO L628 ElimStorePlain]: treesize reduction 3, result has 90.6 percent of original size [2021-02-19 18:55:22,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:55:22,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:55:22,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:55:22,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:55:22,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-02-19 18:55:22,391 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-02-19 18:55:22,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:22,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:55:22,407 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:173, output treesize:3 [2021-02-19 18:55:22,451 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:22,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:55:22,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-02-19 18:55:22,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807403472] [2021-02-19 18:55:22,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:55:22,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:55:22,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:55:22,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:55:22,452 INFO L87 Difference]: Start difference. First operand 3173 states and 10450 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:24,897 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 29 [2021-02-19 18:55:25,175 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-02-19 18:55:25,442 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 32 [2021-02-19 18:55:25,961 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2021-02-19 18:55:26,377 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-02-19 18:55:26,595 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-02-19 18:55:27,062 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2021-02-19 18:55:27,359 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2021-02-19 18:55:28,363 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-02-19 18:55:28,625 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-02-19 18:55:29,739 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-02-19 18:55:30,551 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-02-19 18:55:32,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:55:32,442 INFO L93 Difference]: Finished difference Result 4127 states and 13260 transitions. [2021-02-19 18:55:32,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 18:55:32,444 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:55:32,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:55:32,451 INFO L225 Difference]: With dead ends: 4127 [2021-02-19 18:55:32,451 INFO L226 Difference]: Without dead ends: 4101 [2021-02-19 18:55:32,451 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=498, Invalid=3792, Unknown=0, NotChecked=0, Total=4290 [2021-02-19 18:55:32,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4101 states. [2021-02-19 18:55:32,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4101 to 3209. [2021-02-19 18:55:32,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3209 states, 3208 states have (on average 3.2874064837905235) internal successors, (10546), 3208 states have internal predecessors, (10546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:32,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3209 states to 3209 states and 10546 transitions. [2021-02-19 18:55:32,491 INFO L78 Accepts]: Start accepts. Automaton has 3209 states and 10546 transitions. Word has length 30 [2021-02-19 18:55:32,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:55:32,491 INFO L480 AbstractCegarLoop]: Abstraction has 3209 states and 10546 transitions. [2021-02-19 18:55:32,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:32,492 INFO L276 IsEmpty]: Start isEmpty. Operand 3209 states and 10546 transitions. [2021-02-19 18:55:32,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:55:32,495 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:55:32,495 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:55:32,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-02-19 18:55:32,696 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:55:32,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:55:32,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1089482637, now seen corresponding path program 46 times [2021-02-19 18:55:32,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:55:32,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936111178] [2021-02-19 18:55:32,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:55:32,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:55:33,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:33,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936111178] [2021-02-19 18:55:33,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406622312] [2021-02-19 18:55:33,516 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 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 [2021-02-19 18:55:33,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:55:33,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:55:33,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:55:33,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:55:34,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:55:34,043 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-02-19 18:55:34,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 177 treesize of output 143 [2021-02-19 18:55:34,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:55:34,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:34,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:55:34,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:55:34,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:55:34,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:55:34,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-02-19 18:55:34,069 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-02-19 18:55:34,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:34,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:55:34,080 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:180, output treesize:3 [2021-02-19 18:55:34,135 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:34,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:55:34,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-02-19 18:55:34,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620592327] [2021-02-19 18:55:34,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:55:34,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:55:34,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:55:34,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:55:34,136 INFO L87 Difference]: Start difference. First operand 3209 states and 10546 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:34,863 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-02-19 18:55:35,344 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-02-19 18:55:36,008 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-02-19 18:55:36,209 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-02-19 18:55:36,736 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2021-02-19 18:55:37,444 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-02-19 18:55:37,956 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2021-02-19 18:55:38,134 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2021-02-19 18:55:38,332 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-02-19 18:55:39,016 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-02-19 18:55:39,441 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-02-19 18:55:39,839 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-02-19 18:55:40,288 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-02-19 18:55:40,668 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-02-19 18:55:41,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:55:41,555 INFO L93 Difference]: Finished difference Result 4389 states and 14152 transitions. [2021-02-19 18:55:41,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-02-19 18:55:41,557 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:55:41,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:55:41,564 INFO L225 Difference]: With dead ends: 4389 [2021-02-19 18:55:41,564 INFO L226 Difference]: Without dead ends: 4363 [2021-02-19 18:55:41,564 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=725, Invalid=4975, Unknown=0, NotChecked=0, Total=5700 [2021-02-19 18:55:41,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4363 states. [2021-02-19 18:55:41,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4363 to 3213. [2021-02-19 18:55:41,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3213 states, 3212 states have (on average 3.286425902864259) internal successors, (10556), 3212 states have internal predecessors, (10556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:41,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3213 states to 3213 states and 10556 transitions. [2021-02-19 18:55:41,606 INFO L78 Accepts]: Start accepts. Automaton has 3213 states and 10556 transitions. Word has length 30 [2021-02-19 18:55:41,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:55:41,606 INFO L480 AbstractCegarLoop]: Abstraction has 3213 states and 10556 transitions. [2021-02-19 18:55:41,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:41,606 INFO L276 IsEmpty]: Start isEmpty. Operand 3213 states and 10556 transitions. [2021-02-19 18:55:41,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:55:41,610 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:55:41,610 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:55:41,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-02-19 18:55:41,810 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:55:41,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:55:41,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1630768673, now seen corresponding path program 47 times [2021-02-19 18:55:41,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:55:41,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493982750] [2021-02-19 18:55:41,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:55:41,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:55:42,622 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:42,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493982750] [2021-02-19 18:55:42,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096488804] [2021-02-19 18:55:42,622 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 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 [2021-02-19 18:55:42,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:55:42,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:55:42,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:55:42,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:55:43,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:55:43,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:55:43,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:55:43,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:55:43,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-02-19 18:55:43,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:55:43,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:43,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:55:43,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:55:43,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:55:43,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:55:43,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-02-19 18:55:43,198 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:55:43,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:43,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:55:43,209 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-02-19 18:55:43,256 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:43,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:55:43,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-02-19 18:55:43,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39004543] [2021-02-19 18:55:43,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:55:43,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:55:43,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:55:43,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:55:43,257 INFO L87 Difference]: Start difference. First operand 3213 states and 10556 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:44,832 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-02-19 18:55:45,165 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-02-19 18:55:46,265 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2021-02-19 18:55:47,824 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-02-19 18:55:48,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:55:48,671 INFO L93 Difference]: Finished difference Result 4217 states and 13517 transitions. [2021-02-19 18:55:48,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 18:55:48,673 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:55:48,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:55:48,679 INFO L225 Difference]: With dead ends: 4217 [2021-02-19 18:55:48,679 INFO L226 Difference]: Without dead ends: 4191 [2021-02-19 18:55:48,680 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=430, Invalid=2876, Unknown=0, NotChecked=0, Total=3306 [2021-02-19 18:55:48,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4191 states. [2021-02-19 18:55:48,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4191 to 3237. [2021-02-19 18:55:48,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 3.280593325092707) internal successors, (10616), 3236 states have internal predecessors, (10616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:48,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 10616 transitions. [2021-02-19 18:55:48,718 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 10616 transitions. Word has length 30 [2021-02-19 18:55:48,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:55:48,718 INFO L480 AbstractCegarLoop]: Abstraction has 3237 states and 10616 transitions. [2021-02-19 18:55:48,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:48,718 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 10616 transitions. [2021-02-19 18:55:48,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:55:48,722 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:55:48,722 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:55:48,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-02-19 18:55:48,922 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:55:48,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:55:48,922 INFO L82 PathProgramCache]: Analyzing trace with hash -175548318, now seen corresponding path program 38 times [2021-02-19 18:55:48,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:55:48,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704802108] [2021-02-19 18:55:48,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:55:48,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:55:49,252 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-02-19 18:55:49,383 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-02-19 18:55:49,719 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:49,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704802108] [2021-02-19 18:55:49,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989259970] [2021-02-19 18:55:49,720 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 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 [2021-02-19 18:55:49,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:55:49,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:55:49,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 18:55:49,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:55:50,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:50,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2021-02-19 18:55:50,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:55:50,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:50,447 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-02-19 18:55:50,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2021-02-19 18:55:50,451 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:55:50,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 18:55:50,457 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:55:50,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:50,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:50,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:55:50,524 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:47, output treesize:68 [2021-02-19 18:55:50,690 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:50,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:55:50,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-02-19 18:55:50,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504402157] [2021-02-19 18:55:50,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:55:50,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:55:50,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:55:50,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:55:50,691 INFO L87 Difference]: Start difference. First operand 3237 states and 10616 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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) [2021-02-19 18:55:51,358 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-02-19 18:55:51,867 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-02-19 18:55:52,101 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2021-02-19 18:55:52,349 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 18:55:52,773 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-02-19 18:55:53,000 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-02-19 18:55:53,497 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-02-19 18:55:53,907 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-02-19 18:55:54,110 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-02-19 18:55:54,550 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-02-19 18:55:54,947 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-02-19 18:55:55,119 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-02-19 18:55:55,298 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-02-19 18:55:55,678 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-02-19 18:55:56,249 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-02-19 18:55:56,418 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-02-19 18:55:56,974 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-02-19 18:55:57,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:55:57,770 INFO L93 Difference]: Finished difference Result 4846 states and 15281 transitions. [2021-02-19 18:55:57,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 18:55:57,772 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:55:57,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:55:57,780 INFO L225 Difference]: With dead ends: 4846 [2021-02-19 18:55:57,780 INFO L226 Difference]: Without dead ends: 4816 [2021-02-19 18:55:57,780 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=592, Invalid=3068, Unknown=0, NotChecked=0, Total=3660 [2021-02-19 18:55:57,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4816 states. [2021-02-19 18:55:57,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4816 to 3272. [2021-02-19 18:55:57,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3272 states, 3271 states have (on average 3.2885967594007948) internal successors, (10757), 3271 states have internal predecessors, (10757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:55:57,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3272 states to 3272 states and 10757 transitions. [2021-02-19 18:55:57,823 INFO L78 Accepts]: Start accepts. Automaton has 3272 states and 10757 transitions. Word has length 30 [2021-02-19 18:55:57,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:55:57,823 INFO L480 AbstractCegarLoop]: Abstraction has 3272 states and 10757 transitions. [2021-02-19 18:55:57,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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) [2021-02-19 18:55:57,823 INFO L276 IsEmpty]: Start isEmpty. Operand 3272 states and 10757 transitions. [2021-02-19 18:55:57,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:55:57,827 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:55:57,827 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:55:58,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:55:58,027 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:55:58,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:55:58,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1737022281, now seen corresponding path program 48 times [2021-02-19 18:55:58,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:55:58,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126467617] [2021-02-19 18:55:58,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:55:58,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:55:58,699 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2021-02-19 18:55:58,860 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2021-02-19 18:55:59,086 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:59,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126467617] [2021-02-19 18:55:59,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024895544] [2021-02-19 18:55:59,086 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 [2021-02-19 18:55:59,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:55:59,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:55:59,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:55:59,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:55:59,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:55:59,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:55:59,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:55:59,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:55:59,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-02-19 18:55:59,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:55:59,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:59,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:55:59,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:55:59,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:55:59,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:55:59,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-02-19 18:55:59,734 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:55:59,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:55:59,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:55:59,745 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-02-19 18:55:59,793 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:55:59,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:55:59,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-02-19 18:55:59,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510582277] [2021-02-19 18:55:59,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:55:59,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:55:59,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:55:59,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:55:59,794 INFO L87 Difference]: Start difference. First operand 3272 states and 10757 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:01,589 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-02-19 18:56:01,737 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-02-19 18:56:02,031 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-02-19 18:56:02,183 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-02-19 18:56:02,647 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-02-19 18:56:02,848 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-02-19 18:56:03,721 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-02-19 18:56:03,902 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 32 [2021-02-19 18:56:04,172 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-02-19 18:56:04,463 WARN L202 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-02-19 18:56:05,143 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-02-19 18:56:05,301 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-02-19 18:56:05,633 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-02-19 18:56:05,870 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 31 [2021-02-19 18:56:06,554 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-02-19 18:56:07,034 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-02-19 18:56:08,192 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-02-19 18:56:08,526 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-02-19 18:56:08,741 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2021-02-19 18:56:09,085 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 34 [2021-02-19 18:56:09,826 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-02-19 18:56:09,985 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-02-19 18:56:10,168 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-02-19 18:56:10,440 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2021-02-19 18:56:10,928 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-02-19 18:56:11,144 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-02-19 18:56:11,377 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-02-19 18:56:11,679 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-02-19 18:56:11,920 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-02-19 18:56:12,227 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-02-19 18:56:12,413 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-02-19 18:56:12,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:56:12,956 INFO L93 Difference]: Finished difference Result 4972 states and 15679 transitions. [2021-02-19 18:56:12,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-02-19 18:56:12,957 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:56:12,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:56:12,965 INFO L225 Difference]: With dead ends: 4972 [2021-02-19 18:56:12,965 INFO L226 Difference]: Without dead ends: 4943 [2021-02-19 18:56:12,965 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3368 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=1299, Invalid=8801, Unknown=0, NotChecked=0, Total=10100 [2021-02-19 18:56:12,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4943 states. [2021-02-19 18:56:12,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4943 to 3287. [2021-02-19 18:56:13,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3287 states, 3286 states have (on average 3.2933657942787584) internal successors, (10822), 3286 states have internal predecessors, (10822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:13,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3287 states to 3287 states and 10822 transitions. [2021-02-19 18:56:13,007 INFO L78 Accepts]: Start accepts. Automaton has 3287 states and 10822 transitions. Word has length 30 [2021-02-19 18:56:13,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:56:13,007 INFO L480 AbstractCegarLoop]: Abstraction has 3287 states and 10822 transitions. [2021-02-19 18:56:13,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:13,007 INFO L276 IsEmpty]: Start isEmpty. Operand 3287 states and 10822 transitions. [2021-02-19 18:56:13,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:56:13,011 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:56:13,011 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:56:13,211 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-02-19 18:56:13,211 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:56:13,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:56:13,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1248501593, now seen corresponding path program 49 times [2021-02-19 18:56:13,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:56:13,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176090894] [2021-02-19 18:56:13,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:56:13,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:56:13,435 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-02-19 18:56:14,193 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:14,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176090894] [2021-02-19 18:56:14,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101132931] [2021-02-19 18:56:14,194 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 [2021-02-19 18:56:14,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:56:14,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 18:56:14,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:56:14,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:56:14,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:56:14,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:56:14,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:56:14,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-02-19 18:56:14,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:56:15,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:15,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:56:15,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:56:15,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:56:15,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:56:15,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-02-19 18:56:15,043 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:56:15,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:15,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:56:15,057 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-02-19 18:56:15,135 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:15,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:56:15,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2021-02-19 18:56:15,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891703475] [2021-02-19 18:56:15,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-19 18:56:15,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:56:15,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-19 18:56:15,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-02-19 18:56:15,136 INFO L87 Difference]: Start difference. First operand 3287 states and 10822 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:18,063 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2021-02-19 18:56:18,682 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2021-02-19 18:56:19,116 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2021-02-19 18:56:19,518 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-02-19 18:56:19,767 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2021-02-19 18:56:19,989 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 35 [2021-02-19 18:56:20,691 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-02-19 18:56:21,075 WARN L202 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-02-19 18:56:21,868 WARN L202 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-02-19 18:56:22,452 WARN L202 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-02-19 18:56:24,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:56:24,674 INFO L93 Difference]: Finished difference Result 6121 states and 19204 transitions. [2021-02-19 18:56:24,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-02-19 18:56:24,676 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:56:24,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:56:24,685 INFO L225 Difference]: With dead ends: 6121 [2021-02-19 18:56:24,686 INFO L226 Difference]: Without dead ends: 6100 [2021-02-19 18:56:24,686 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2057 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=840, Invalid=5802, Unknown=0, NotChecked=0, Total=6642 [2021-02-19 18:56:24,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6100 states. [2021-02-19 18:56:24,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6100 to 3399. [2021-02-19 18:56:24,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3399 states, 3398 states have (on average 3.294290759270159) internal successors, (11194), 3398 states have internal predecessors, (11194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:24,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3399 states to 3399 states and 11194 transitions. [2021-02-19 18:56:24,747 INFO L78 Accepts]: Start accepts. Automaton has 3399 states and 11194 transitions. Word has length 30 [2021-02-19 18:56:24,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:56:24,747 INFO L480 AbstractCegarLoop]: Abstraction has 3399 states and 11194 transitions. [2021-02-19 18:56:24,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:24,747 INFO L276 IsEmpty]: Start isEmpty. Operand 3399 states and 11194 transitions. [2021-02-19 18:56:24,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:56:24,751 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:56:24,751 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:56:24,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-02-19 18:56:24,952 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:56:24,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:56:24,952 INFO L82 PathProgramCache]: Analyzing trace with hash -63594106, now seen corresponding path program 39 times [2021-02-19 18:56:24,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:56:24,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888292083] [2021-02-19 18:56:24,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:56:24,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:56:25,284 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2021-02-19 18:56:25,501 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-02-19 18:56:25,688 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-02-19 18:56:26,114 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:26,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888292083] [2021-02-19 18:56:26,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741148082] [2021-02-19 18:56:26,114 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 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 [2021-02-19 18:56:26,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:56:26,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:56:26,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:56:26,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:56:26,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:56:26,682 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:26,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2021-02-19 18:56:26,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:56:26,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:26,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:56:26,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 18:56:26,776 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:56:26,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:26,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:56:26,848 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-02-19 18:56:26,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2021-02-19 18:56:26,852 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:56:26,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:26,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 18:56:26,939 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:47, output treesize:59 [2021-02-19 18:56:27,126 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-02-19 18:56:27,221 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:27,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:56:27,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-02-19 18:56:27,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734931826] [2021-02-19 18:56:27,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:56:27,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:56:27,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:56:27,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:56:27,222 INFO L87 Difference]: Start difference. First operand 3399 states and 11194 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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) [2021-02-19 18:56:27,670 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 29 [2021-02-19 18:56:28,217 WARN L202 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-02-19 18:56:28,421 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 35 [2021-02-19 18:56:28,774 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-02-19 18:56:29,074 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-02-19 18:56:29,416 WARN L202 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-02-19 18:56:29,713 WARN L202 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-02-19 18:56:30,185 WARN L202 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-02-19 18:56:30,427 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-02-19 18:56:30,585 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-02-19 18:56:30,889 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-02-19 18:56:31,124 WARN L202 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-02-19 18:56:32,003 WARN L202 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-02-19 18:56:32,547 WARN L202 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-02-19 18:56:32,952 WARN L202 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2021-02-19 18:56:33,114 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-02-19 18:56:33,536 WARN L202 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-02-19 18:56:34,161 WARN L202 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-02-19 18:56:34,578 WARN L202 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-02-19 18:56:34,985 WARN L202 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-02-19 18:56:35,308 WARN L202 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-02-19 18:56:35,764 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-02-19 18:56:36,278 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-02-19 18:56:36,863 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-02-19 18:56:37,021 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-02-19 18:56:37,315 WARN L202 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-02-19 18:56:37,959 WARN L202 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-02-19 18:56:38,131 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-02-19 18:56:38,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:56:38,595 INFO L93 Difference]: Finished difference Result 5441 states and 17311 transitions. [2021-02-19 18:56:38,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-02-19 18:56:38,598 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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 30 [2021-02-19 18:56:38,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:56:38,606 INFO L225 Difference]: With dead ends: 5441 [2021-02-19 18:56:38,606 INFO L226 Difference]: Without dead ends: 5422 [2021-02-19 18:56:38,606 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1413 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=799, Invalid=3491, Unknown=0, NotChecked=0, Total=4290 [2021-02-19 18:56:38,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5422 states. [2021-02-19 18:56:38,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5422 to 3412. [2021-02-19 18:56:38,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3412 states, 3411 states have (on average 3.2961008501905598) internal successors, (11243), 3411 states have internal predecessors, (11243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:38,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3412 states to 3412 states and 11243 transitions. [2021-02-19 18:56:38,660 INFO L78 Accepts]: Start accepts. Automaton has 3412 states and 11243 transitions. Word has length 30 [2021-02-19 18:56:38,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:56:38,661 INFO L480 AbstractCegarLoop]: Abstraction has 3412 states and 11243 transitions. [2021-02-19 18:56:38,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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) [2021-02-19 18:56:38,661 INFO L276 IsEmpty]: Start isEmpty. Operand 3412 states and 11243 transitions. [2021-02-19 18:56:38,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:56:38,664 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:56:38,664 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:56:38,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-02-19 18:56:38,865 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:56:38,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:56:38,865 INFO L82 PathProgramCache]: Analyzing trace with hash 808125790, now seen corresponding path program 40 times [2021-02-19 18:56:38,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:56:38,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076804052] [2021-02-19 18:56:38,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:56:38,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:56:39,171 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2021-02-19 18:56:39,386 WARN L202 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-02-19 18:56:39,601 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-02-19 18:56:40,059 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:40,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076804052] [2021-02-19 18:56:40,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012379200] [2021-02-19 18:56:40,059 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 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 [2021-02-19 18:56:40,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:56:40,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:56:40,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:56:40,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:56:40,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:56:40,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:56:40,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-02-19 18:56:40,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:56:40,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:40,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:56:40,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-02-19 18:56:40,927 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:56:40,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:40,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:56:40,950 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:3 [2021-02-19 18:56:41,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:41,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:56:41,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-02-19 18:56:41,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73989026] [2021-02-19 18:56:41,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:56:41,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:56:41,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:56:41,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:56:41,028 INFO L87 Difference]: Start difference. First operand 3412 states and 11243 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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) [2021-02-19 18:56:41,227 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-02-19 18:56:41,453 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-02-19 18:56:41,884 WARN L202 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2021-02-19 18:56:42,046 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-02-19 18:56:42,348 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-02-19 18:56:42,849 WARN L202 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 18:56:43,177 WARN L202 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-02-19 18:56:43,611 WARN L202 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-02-19 18:56:44,060 WARN L202 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-02-19 18:56:44,595 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-02-19 18:56:44,868 WARN L202 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-02-19 18:56:45,035 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-02-19 18:56:45,432 WARN L202 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-02-19 18:56:45,992 WARN L202 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-02-19 18:56:46,312 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-02-19 18:56:46,718 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-02-19 18:56:47,174 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-02-19 18:56:48,054 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-02-19 18:56:48,513 WARN L202 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-02-19 18:56:48,704 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-02-19 18:56:49,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:56:49,169 INFO L93 Difference]: Finished difference Result 4831 states and 15425 transitions. [2021-02-19 18:56:49,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 18:56:49,172 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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 30 [2021-02-19 18:56:49,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:56:49,179 INFO L225 Difference]: With dead ends: 4831 [2021-02-19 18:56:49,179 INFO L226 Difference]: Without dead ends: 4816 [2021-02-19 18:56:49,180 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=534, Invalid=2328, Unknown=0, NotChecked=0, Total=2862 [2021-02-19 18:56:49,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4816 states. [2021-02-19 18:56:49,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4816 to 3398. [2021-02-19 18:56:49,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3398 states, 3397 states have (on average 3.292905504857227) internal successors, (11186), 3397 states have internal predecessors, (11186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:49,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3398 states to 3398 states and 11186 transitions. [2021-02-19 18:56:49,228 INFO L78 Accepts]: Start accepts. Automaton has 3398 states and 11186 transitions. Word has length 30 [2021-02-19 18:56:49,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:56:49,228 INFO L480 AbstractCegarLoop]: Abstraction has 3398 states and 11186 transitions. [2021-02-19 18:56:49,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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) [2021-02-19 18:56:49,228 INFO L276 IsEmpty]: Start isEmpty. Operand 3398 states and 11186 transitions. [2021-02-19 18:56:49,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:56:49,232 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:56:49,232 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:56:49,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:56:49,435 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:56:49,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:56:49,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1531873319, now seen corresponding path program 50 times [2021-02-19 18:56:49,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:56:49,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513175564] [2021-02-19 18:56:49,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:56:49,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:56:49,737 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-02-19 18:56:49,985 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-02-19 18:56:50,660 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:50,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513175564] [2021-02-19 18:56:50,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797566280] [2021-02-19 18:56:50,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 18:56:50,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:56:50,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:56:50,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:56:50,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:56:51,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:56:51,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:56:51,392 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:51,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 51 [2021-02-19 18:56:51,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-02-19 18:56:51,484 INFO L628 ElimStorePlain]: treesize reduction 42, result has 42.5 percent of original size [2021-02-19 18:56:51,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:56:51,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:56:51,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-02-19 18:56:51,499 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-02-19 18:56:51,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:56:51,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:56:51,526 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:15 [2021-02-19 18:56:51,690 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:56:51,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:56:51,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 24 [2021-02-19 18:56:51,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246757360] [2021-02-19 18:56:51,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:56:51,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:56:51,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:56:51,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:56:51,691 INFO L87 Difference]: Start difference. First operand 3398 states and 11186 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:56:52,371 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-02-19 18:56:52,834 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2021-02-19 18:56:53,547 WARN L202 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-02-19 18:56:53,905 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-02-19 18:56:54,297 WARN L202 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-02-19 18:56:54,495 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-02-19 18:56:54,703 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-02-19 18:56:54,987 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-02-19 18:56:55,354 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-02-19 18:56:55,583 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-02-19 18:56:55,760 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 22 [2021-02-19 18:56:56,003 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-02-19 18:56:56,888 WARN L202 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-02-19 18:56:57,155 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-02-19 18:56:57,448 WARN L202 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-02-19 18:56:58,007 WARN L202 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-02-19 18:56:58,361 WARN L202 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2021-02-19 18:56:58,818 WARN L202 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-02-19 18:56:58,999 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2021-02-19 18:56:59,461 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2021-02-19 18:56:59,681 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2021-02-19 18:57:00,822 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 29 [2021-02-19 18:57:01,025 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 30 [2021-02-19 18:57:01,286 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 36 [2021-02-19 18:57:02,038 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-02-19 18:57:03,108 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 39 [2021-02-19 18:57:03,334 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 36 [2021-02-19 18:57:03,555 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 35 [2021-02-19 18:57:03,834 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 33 [2021-02-19 18:57:04,237 WARN L202 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-02-19 18:57:04,522 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-02-19 18:57:04,779 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-02-19 18:57:05,092 WARN L202 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-02-19 18:57:05,927 WARN L202 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 46 [2021-02-19 18:57:06,428 WARN L202 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-02-19 18:57:07,024 WARN L202 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-02-19 18:57:07,268 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-02-19 18:57:07,499 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-02-19 18:57:08,316 WARN L202 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-02-19 18:57:08,607 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-02-19 18:57:09,921 WARN L202 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2021-02-19 18:57:10,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:57:10,527 INFO L93 Difference]: Finished difference Result 6799 states and 21050 transitions. [2021-02-19 18:57:10,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-02-19 18:57:10,530 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:57:10,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:57:10,541 INFO L225 Difference]: With dead ends: 6799 [2021-02-19 18:57:10,541 INFO L226 Difference]: Without dead ends: 6737 [2021-02-19 18:57:10,542 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4378 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=1823, Invalid=10609, Unknown=0, NotChecked=0, Total=12432 [2021-02-19 18:57:10,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6737 states. [2021-02-19 18:57:10,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6737 to 3510. [2021-02-19 18:57:10,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3510 states, 3509 states have (on average 3.2898261612995157) internal successors, (11544), 3509 states have internal predecessors, (11544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:10,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3510 states to 3510 states and 11544 transitions. [2021-02-19 18:57:10,621 INFO L78 Accepts]: Start accepts. Automaton has 3510 states and 11544 transitions. Word has length 30 [2021-02-19 18:57:10,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:57:10,621 INFO L480 AbstractCegarLoop]: Abstraction has 3510 states and 11544 transitions. [2021-02-19 18:57:10,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:10,621 INFO L276 IsEmpty]: Start isEmpty. Operand 3510 states and 11544 transitions. [2021-02-19 18:57:10,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:57:10,625 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:57:10,625 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:57:10,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:57:10,826 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:57:10,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:57:10,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1313049474, now seen corresponding path program 41 times [2021-02-19 18:57:10,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:57:10,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539221017] [2021-02-19 18:57:10,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:57:10,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:57:11,134 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2021-02-19 18:57:11,336 WARN L202 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-02-19 18:57:11,563 WARN L202 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-02-19 18:57:11,960 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:11,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539221017] [2021-02-19 18:57:11,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728335027] [2021-02-19 18:57:11,960 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 [2021-02-19 18:57:11,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:57:11,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:57:11,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 18:57:11,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:57:12,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:12,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:12,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:12,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-02-19 18:57:12,626 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-02-19 18:57:12,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:12,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 18:57:12,670 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-02-19 18:57:12,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:12,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:57:12,706 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:47, output treesize:41 [2021-02-19 18:57:13,000 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:13,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:57:13,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-02-19 18:57:13,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135475933] [2021-02-19 18:57:13,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:57:13,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:57:13,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:57:13,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:57:13,001 INFO L87 Difference]: Start difference. First operand 3510 states and 11544 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 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) [2021-02-19 18:57:13,296 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 30 [2021-02-19 18:57:13,744 WARN L202 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-02-19 18:57:13,975 WARN L202 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-02-19 18:57:14,322 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-02-19 18:57:14,633 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-02-19 18:57:15,006 WARN L202 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-02-19 18:57:15,264 WARN L202 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-02-19 18:57:15,560 WARN L202 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-02-19 18:57:15,722 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-02-19 18:57:16,073 WARN L202 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-02-19 18:57:16,320 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-02-19 18:57:16,793 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-02-19 18:57:17,057 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-02-19 18:57:17,373 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-02-19 18:57:17,688 WARN L202 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-02-19 18:57:18,210 WARN L202 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-02-19 18:57:18,655 WARN L202 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-02-19 18:57:19,022 WARN L202 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-02-19 18:57:19,879 WARN L202 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-02-19 18:57:20,345 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-02-19 18:57:20,706 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-02-19 18:57:21,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:57:21,987 INFO L93 Difference]: Finished difference Result 4628 states and 15016 transitions. [2021-02-19 18:57:21,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 18:57:21,990 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 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 30 [2021-02-19 18:57:21,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:57:21,997 INFO L225 Difference]: With dead ends: 4628 [2021-02-19 18:57:21,997 INFO L226 Difference]: Without dead ends: 4603 [2021-02-19 18:57:21,997 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=498, Invalid=2694, Unknown=0, NotChecked=0, Total=3192 [2021-02-19 18:57:22,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4603 states. [2021-02-19 18:57:22,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4603 to 3504. [2021-02-19 18:57:22,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3504 states, 3503 states have (on average 3.2906080502426494) internal successors, (11527), 3503 states have internal predecessors, (11527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:22,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3504 states to 3504 states and 11527 transitions. [2021-02-19 18:57:22,043 INFO L78 Accepts]: Start accepts. Automaton has 3504 states and 11527 transitions. Word has length 30 [2021-02-19 18:57:22,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:57:22,043 INFO L480 AbstractCegarLoop]: Abstraction has 3504 states and 11527 transitions. [2021-02-19 18:57:22,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 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) [2021-02-19 18:57:22,043 INFO L276 IsEmpty]: Start isEmpty. Operand 3504 states and 11527 transitions. [2021-02-19 18:57:22,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:57:22,047 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:57:22,047 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:57:22,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-02-19 18:57:22,247 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:57:22,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:57:22,248 INFO L82 PathProgramCache]: Analyzing trace with hash 190225666, now seen corresponding path program 42 times [2021-02-19 18:57:22,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:57:22,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212185527] [2021-02-19 18:57:22,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:57:22,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:57:22,533 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2021-02-19 18:57:22,740 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-02-19 18:57:22,930 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-02-19 18:57:23,267 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:23,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212185527] [2021-02-19 18:57:23,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176923483] [2021-02-19 18:57:23,267 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 [2021-02-19 18:57:23,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:57:23,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:57:23,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 18:57:23,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:57:23,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:23,992 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:23,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2021-02-19 18:57:24,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:57:24,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:24,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:57:24,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-02-19 18:57:24,082 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:24,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:24,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:24,156 INFO L354 Elim1Store]: treesize reduction 11, result has 42.1 percent of original size [2021-02-19 18:57:24,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 29 [2021-02-19 18:57:24,162 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:57:24,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:24,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:57:24,235 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:53, output treesize:96 [2021-02-19 18:57:24,723 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:24,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:57:24,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-02-19 18:57:24,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159257704] [2021-02-19 18:57:24,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:57:24,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:57:24,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:57:24,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:57:24,724 INFO L87 Difference]: Start difference. First operand 3504 states and 11527 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:25,051 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-02-19 18:57:25,252 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-02-19 18:57:25,474 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 31 [2021-02-19 18:57:25,693 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2021-02-19 18:57:26,180 WARN L202 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-02-19 18:57:26,408 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 37 [2021-02-19 18:57:26,657 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2021-02-19 18:57:27,193 WARN L202 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-02-19 18:57:27,833 WARN L202 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2021-02-19 18:57:28,224 WARN L202 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-02-19 18:57:28,565 WARN L202 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-02-19 18:57:29,344 WARN L202 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2021-02-19 18:57:29,689 WARN L202 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-02-19 18:57:29,986 WARN L202 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-02-19 18:57:30,230 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-02-19 18:57:30,800 WARN L202 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-02-19 18:57:31,035 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-02-19 18:57:31,340 WARN L202 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-02-19 18:57:31,755 WARN L202 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-02-19 18:57:32,254 WARN L202 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-02-19 18:57:32,893 WARN L202 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2021-02-19 18:57:33,197 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-02-19 18:57:33,765 WARN L202 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-02-19 18:57:34,218 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2021-02-19 18:57:34,556 WARN L202 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-02-19 18:57:34,955 WARN L202 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-02-19 18:57:35,218 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-02-19 18:57:35,452 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2021-02-19 18:57:35,887 WARN L202 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 37 [2021-02-19 18:57:36,098 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-02-19 18:57:36,319 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-02-19 18:57:36,579 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-02-19 18:57:36,928 WARN L202 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 43 [2021-02-19 18:57:37,398 WARN L202 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2021-02-19 18:57:37,881 WARN L202 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-02-19 18:57:38,213 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 29 [2021-02-19 18:57:38,931 WARN L202 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 82 [2021-02-19 18:57:39,100 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-02-19 18:57:39,432 WARN L202 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-02-19 18:57:39,950 WARN L202 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-02-19 18:57:40,210 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-02-19 18:57:40,831 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-02-19 18:57:41,314 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-02-19 18:57:41,523 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-02-19 18:57:41,813 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-02-19 18:57:42,172 WARN L202 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2021-02-19 18:57:42,767 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-02-19 18:57:42,936 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-02-19 18:57:43,465 WARN L202 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-02-19 18:57:43,872 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-02-19 18:57:44,220 WARN L202 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-02-19 18:57:44,506 WARN L202 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-02-19 18:57:45,033 WARN L202 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 31 [2021-02-19 18:57:45,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:57:45,413 INFO L93 Difference]: Finished difference Result 6079 states and 19181 transitions. [2021-02-19 18:57:45,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-02-19 18:57:45,416 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:57:45,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:57:45,425 INFO L225 Difference]: With dead ends: 6079 [2021-02-19 18:57:45,425 INFO L226 Difference]: Without dead ends: 6037 [2021-02-19 18:57:45,425 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2792 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=1069, Invalid=7121, Unknown=0, NotChecked=0, Total=8190 [2021-02-19 18:57:45,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6037 states. [2021-02-19 18:57:45,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6037 to 3546. [2021-02-19 18:57:45,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3546 states, 3545 states have (on average 3.297320169252468) internal successors, (11689), 3545 states have internal predecessors, (11689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:45,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3546 states to 3546 states and 11689 transitions. [2021-02-19 18:57:45,509 INFO L78 Accepts]: Start accepts. Automaton has 3546 states and 11689 transitions. Word has length 30 [2021-02-19 18:57:45,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:57:45,509 INFO L480 AbstractCegarLoop]: Abstraction has 3546 states and 11689 transitions. [2021-02-19 18:57:45,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:45,509 INFO L276 IsEmpty]: Start isEmpty. Operand 3546 states and 11689 transitions. [2021-02-19 18:57:45,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:57:45,513 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:57:45,513 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:57:45,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-02-19 18:57:45,713 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:57:45,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:57:45,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1061945562, now seen corresponding path program 43 times [2021-02-19 18:57:45,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:57:45,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811512190] [2021-02-19 18:57:45,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:57:45,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:57:46,010 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2021-02-19 18:57:46,222 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-02-19 18:57:46,420 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-02-19 18:57:46,751 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:46,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811512190] [2021-02-19 18:57:46,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271519634] [2021-02-19 18:57:46,752 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 [2021-02-19 18:57:46,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:57:46,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:57:46,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:57:47,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:57:47,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:57:47,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-02-19 18:57:47,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:47,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:47,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:57:47,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-02-19 18:57:47,623 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:47,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:47,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:57:47,641 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:3 [2021-02-19 18:57:47,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:47,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:57:47,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-02-19 18:57:47,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695741855] [2021-02-19 18:57:47,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:57:47,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:57:47,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:57:47,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:57:47,710 INFO L87 Difference]: Start difference. First operand 3546 states and 11689 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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) [2021-02-19 18:57:47,921 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-02-19 18:57:48,165 WARN L202 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-02-19 18:57:48,730 WARN L202 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-02-19 18:57:48,990 WARN L202 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2021-02-19 18:57:49,432 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-02-19 18:57:49,907 WARN L202 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-02-19 18:57:50,259 WARN L202 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-02-19 18:57:50,481 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-02-19 18:57:50,927 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-02-19 18:57:51,517 WARN L202 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2021-02-19 18:57:51,728 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-02-19 18:57:52,056 WARN L202 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-02-19 18:57:52,349 WARN L202 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-02-19 18:57:52,940 WARN L202 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-02-19 18:57:53,456 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-02-19 18:57:54,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:57:54,327 INFO L93 Difference]: Finished difference Result 4486 states and 14541 transitions. [2021-02-19 18:57:54,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-02-19 18:57:54,329 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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 30 [2021-02-19 18:57:54,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:57:54,336 INFO L225 Difference]: With dead ends: 4486 [2021-02-19 18:57:54,336 INFO L226 Difference]: Without dead ends: 4471 [2021-02-19 18:57:54,336 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=396, Invalid=1766, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 18:57:54,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4471 states. [2021-02-19 18:57:54,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4471 to 3546. [2021-02-19 18:57:54,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3546 states, 3545 states have (on average 3.2942172073342735) internal successors, (11678), 3545 states have internal predecessors, (11678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:54,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3546 states to 3546 states and 11678 transitions. [2021-02-19 18:57:54,381 INFO L78 Accepts]: Start accepts. Automaton has 3546 states and 11678 transitions. Word has length 30 [2021-02-19 18:57:54,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:57:54,381 INFO L480 AbstractCegarLoop]: Abstraction has 3546 states and 11678 transitions. [2021-02-19 18:57:54,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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) [2021-02-19 18:57:54,381 INFO L276 IsEmpty]: Start isEmpty. Operand 3546 states and 11678 transitions. [2021-02-19 18:57:54,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:57:54,385 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:57:54,385 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:57:54,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-02-19 18:57:54,598 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:57:54,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:57:54,598 INFO L82 PathProgramCache]: Analyzing trace with hash -640141856, now seen corresponding path program 44 times [2021-02-19 18:57:54,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:57:54,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760749312] [2021-02-19 18:57:54,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:57:54,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:57:54,900 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2021-02-19 18:57:55,121 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-02-19 18:57:55,350 WARN L202 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-02-19 18:57:55,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:55,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760749312] [2021-02-19 18:57:55,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387982830] [2021-02-19 18:57:55,710 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 [2021-02-19 18:57:55,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:57:55,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:57:55,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:57:55,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:57:56,419 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:56,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 39 [2021-02-19 18:57:56,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:57:56,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:56,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:57:56,576 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-02-19 18:57:56,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 30 [2021-02-19 18:57:56,580 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:57:56,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-02-19 18:57:56,593 INFO L550 ElimStorePlain]: Start of recursive call 4: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-02-19 18:57:56,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:56,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:57:56,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:57:56,685 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:45, output treesize:116 [2021-02-19 18:57:56,999 WARN L202 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-02-19 18:57:57,361 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:57:57,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:57:57,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-02-19 18:57:57,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057526814] [2021-02-19 18:57:57,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:57:57,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:57:57,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:57:57,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:57:57,362 INFO L87 Difference]: Start difference. First operand 3546 states and 11678 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:57:57,856 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 19 [2021-02-19 18:57:58,082 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 27 [2021-02-19 18:57:58,653 WARN L202 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-02-19 18:57:58,958 WARN L202 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 36 [2021-02-19 18:57:59,270 WARN L202 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2021-02-19 18:57:59,977 WARN L202 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-02-19 18:58:00,817 WARN L202 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-02-19 18:58:01,110 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-02-19 18:58:01,352 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-02-19 18:58:01,756 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-02-19 18:58:02,157 WARN L202 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-02-19 18:58:02,501 WARN L202 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-02-19 18:58:02,875 WARN L202 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-02-19 18:58:03,183 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-02-19 18:58:03,597 WARN L202 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-02-19 18:58:03,906 WARN L202 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-02-19 18:58:04,705 WARN L202 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-02-19 18:58:05,142 WARN L202 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-02-19 18:58:05,887 WARN L202 SmtUtils]: Spent 621.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-02-19 18:58:06,624 WARN L202 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-02-19 18:58:07,048 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2021-02-19 18:58:07,282 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-02-19 18:58:07,799 WARN L202 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-02-19 18:58:08,399 WARN L202 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 36 [2021-02-19 18:58:08,721 WARN L202 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-02-19 18:58:09,231 WARN L202 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-02-19 18:58:09,793 WARN L202 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2021-02-19 18:58:10,690 WARN L202 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2021-02-19 18:58:10,933 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-02-19 18:58:11,577 WARN L202 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-02-19 18:58:11,931 WARN L202 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-02-19 18:58:12,458 WARN L202 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-02-19 18:58:13,021 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-02-19 18:58:13,514 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-02-19 18:58:13,778 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-02-19 18:58:14,184 WARN L202 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-02-19 18:58:14,756 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-02-19 18:58:14,998 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 18 [2021-02-19 18:58:15,432 WARN L202 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2021-02-19 18:58:15,789 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-02-19 18:58:16,097 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 18 [2021-02-19 18:58:16,497 WARN L202 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2021-02-19 18:58:16,804 WARN L202 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2021-02-19 18:58:17,263 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 17 [2021-02-19 18:58:17,497 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 17 [2021-02-19 18:58:17,809 WARN L202 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-02-19 18:58:18,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:58:18,416 INFO L93 Difference]: Finished difference Result 5798 states and 18354 transitions. [2021-02-19 18:58:18,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-02-19 18:58:18,421 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:58:18,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:58:18,430 INFO L225 Difference]: With dead ends: 5798 [2021-02-19 18:58:18,430 INFO L226 Difference]: Without dead ends: 5721 [2021-02-19 18:58:18,430 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2292 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=939, Invalid=5867, Unknown=0, NotChecked=0, Total=6806 [2021-02-19 18:58:18,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5721 states. [2021-02-19 18:58:18,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5721 to 3523. [2021-02-19 18:58:18,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3523 states, 3522 states have (on average 3.2890403180011356) internal successors, (11584), 3522 states have internal predecessors, (11584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:18,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3523 states to 3523 states and 11584 transitions. [2021-02-19 18:58:18,507 INFO L78 Accepts]: Start accepts. Automaton has 3523 states and 11584 transitions. Word has length 30 [2021-02-19 18:58:18,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:58:18,507 INFO L480 AbstractCegarLoop]: Abstraction has 3523 states and 11584 transitions. [2021-02-19 18:58:18,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:18,507 INFO L276 IsEmpty]: Start isEmpty. Operand 3523 states and 11584 transitions. [2021-02-19 18:58:18,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:58:18,512 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:58:18,512 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:58:18,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-02-19 18:58:18,713 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:58:18,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:58:18,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1029376390, now seen corresponding path program 45 times [2021-02-19 18:58:18,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:58:18,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910702660] [2021-02-19 18:58:18,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:58:18,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:58:19,116 WARN L202 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2021-02-19 18:58:19,429 WARN L202 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-02-19 18:58:19,648 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-02-19 18:58:20,115 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:58:20,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910702660] [2021-02-19 18:58:20,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117857467] [2021-02-19 18:58:20,115 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 [2021-02-19 18:58:20,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:58:20,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:58:20,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:58:20,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:58:20,787 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:20,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 47 [2021-02-19 18:58:20,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:58:20,925 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-02-19 18:58:20,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:21,114 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-02-19 18:58:21,115 INFO L354 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2021-02-19 18:58:21,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 60 [2021-02-19 18:58:21,134 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:58:21,192 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:21,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 42 [2021-02-19 18:58:21,211 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:58:21,496 WARN L202 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-02-19 18:58:21,498 INFO L628 ElimStorePlain]: treesize reduction 34, result has 66.3 percent of original size [2021-02-19 18:58:21,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:58:21,534 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:44, output treesize:213 [2021-02-19 18:58:22,397 WARN L202 SmtUtils]: Spent 772.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 18:58:23,623 WARN L202 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2021-02-19 18:58:24,270 WARN L202 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-02-19 18:58:24,464 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:58:24,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:58:24,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-02-19 18:58:24,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25556145] [2021-02-19 18:58:24,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:58:24,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:58:24,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:58:24,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:58:24,465 INFO L87 Difference]: Start difference. First operand 3523 states and 11584 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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) [2021-02-19 18:58:24,791 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 18 [2021-02-19 18:58:25,369 WARN L202 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 39 [2021-02-19 18:58:25,672 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2021-02-19 18:58:26,932 WARN L202 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 103 DAG size of output: 84 [2021-02-19 18:58:27,376 WARN L202 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 45 [2021-02-19 18:58:27,736 WARN L202 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 27 [2021-02-19 18:58:29,109 WARN L202 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-02-19 18:58:29,543 WARN L202 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 33 [2021-02-19 18:58:29,886 WARN L202 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-02-19 18:58:30,663 WARN L202 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 41 [2021-02-19 18:58:31,844 WARN L202 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 123 DAG size of output: 69 [2021-02-19 18:58:32,424 WARN L202 SmtUtils]: Spent 460.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-02-19 18:58:33,745 WARN L202 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 112 DAG size of output: 74 [2021-02-19 18:58:34,122 WARN L202 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-02-19 18:58:35,707 WARN L202 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2021-02-19 18:58:35,948 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-02-19 18:58:36,807 WARN L202 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 42 [2021-02-19 18:58:37,200 WARN L202 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2021-02-19 18:58:37,790 WARN L202 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 25 [2021-02-19 18:58:38,218 WARN L202 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 23 [2021-02-19 18:58:39,495 WARN L202 SmtUtils]: Spent 921.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2021-02-19 18:58:40,795 WARN L202 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2021-02-19 18:58:41,645 WARN L202 SmtUtils]: Spent 607.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-02-19 18:58:42,755 WARN L202 SmtUtils]: Spent 900.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 62 [2021-02-19 18:58:44,234 WARN L202 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-02-19 18:58:44,923 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-02-19 18:58:45,469 WARN L202 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 35 [2021-02-19 18:58:45,807 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-02-19 18:58:46,617 WARN L202 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 54 [2021-02-19 18:58:48,006 WARN L202 SmtUtils]: Spent 738.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 42 [2021-02-19 18:58:48,523 WARN L202 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-02-19 18:58:48,858 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-02-19 18:58:49,283 WARN L202 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-02-19 18:58:49,763 WARN L202 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-02-19 18:58:50,688 WARN L202 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 50 [2021-02-19 18:58:50,951 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-02-19 18:58:52,423 WARN L202 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-02-19 18:58:53,122 WARN L202 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2021-02-19 18:58:55,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:58:55,308 INFO L93 Difference]: Finished difference Result 5554 states and 17815 transitions. [2021-02-19 18:58:55,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-02-19 18:58:55,313 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:58:55,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:58:55,322 INFO L225 Difference]: With dead ends: 5554 [2021-02-19 18:58:55,322 INFO L226 Difference]: Without dead ends: 5504 [2021-02-19 18:58:55,322 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1601 ImplicationChecksByTransitivity, 29.1s TimeCoverageRelationStatistics Valid=811, Invalid=4301, Unknown=0, NotChecked=0, Total=5112 [2021-02-19 18:58:55,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5504 states. [2021-02-19 18:58:55,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5504 to 3544. [2021-02-19 18:58:55,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3544 states, 3543 states have (on average 3.290149590742309) internal successors, (11657), 3543 states have internal predecessors, (11657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:55,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3544 states to 3544 states and 11657 transitions. [2021-02-19 18:58:55,411 INFO L78 Accepts]: Start accepts. Automaton has 3544 states and 11657 transitions. Word has length 30 [2021-02-19 18:58:55,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:58:55,411 INFO L480 AbstractCegarLoop]: Abstraction has 3544 states and 11657 transitions. [2021-02-19 18:58:55,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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) [2021-02-19 18:58:55,411 INFO L276 IsEmpty]: Start isEmpty. Operand 3544 states and 11657 transitions. [2021-02-19 18:58:55,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:58:55,416 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:58:55,416 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:58:55,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:58:55,617 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:58:55,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:58:55,617 INFO L82 PathProgramCache]: Analyzing trace with hash 308222354, now seen corresponding path program 46 times [2021-02-19 18:58:55,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:58:55,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816974553] [2021-02-19 18:58:55,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:58:55,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:58:56,025 WARN L202 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 21 [2021-02-19 18:58:56,483 WARN L202 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2021-02-19 18:58:56,939 WARN L202 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-02-19 18:58:57,148 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-02-19 18:58:57,321 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-02-19 18:58:57,491 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-02-19 18:58:57,708 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:58:57,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816974553] [2021-02-19 18:58:57,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448967387] [2021-02-19 18:58:57,709 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 [2021-02-19 18:58:57,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:58:57,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:58:57,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:58:57,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:58:58,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:58:58,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:58:58,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-02-19 18:58:58,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:58:58,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:58,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:58:58,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-02-19 18:58:58,972 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:58:58,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:58:59,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:58:59,002 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:52, output treesize:7 [2021-02-19 18:58:59,143 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:58:59,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:58:59,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-02-19 18:58:59,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769544977] [2021-02-19 18:58:59,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 18:58:59,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:58:59,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 18:58:59,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-02-19 18:58:59,144 INFO L87 Difference]: Start difference. First operand 3544 states and 11657 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:58:59,637 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 15 [2021-02-19 18:59:00,323 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 21 [2021-02-19 18:59:01,095 WARN L202 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-02-19 18:59:01,350 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-02-19 18:59:02,366 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-02-19 18:59:02,704 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-02-19 18:59:03,301 WARN L202 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-02-19 18:59:03,787 WARN L202 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-02-19 18:59:05,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:59:05,405 INFO L93 Difference]: Finished difference Result 4240 states and 13786 transitions. [2021-02-19 18:59:05,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 18:59:05,409 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:59:05,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:59:05,416 INFO L225 Difference]: With dead ends: 4240 [2021-02-19 18:59:05,417 INFO L226 Difference]: Without dead ends: 4221 [2021-02-19 18:59:05,417 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 18:59:05,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4221 states. [2021-02-19 18:59:05,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4221 to 3557. [2021-02-19 18:59:05,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3557 states, 3556 states have (on average 3.2927446569178853) internal successors, (11709), 3556 states have internal predecessors, (11709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:59:05,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3557 states to 3557 states and 11709 transitions. [2021-02-19 18:59:05,473 INFO L78 Accepts]: Start accepts. Automaton has 3557 states and 11709 transitions. Word has length 30 [2021-02-19 18:59:05,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:59:05,473 INFO L480 AbstractCegarLoop]: Abstraction has 3557 states and 11709 transitions. [2021-02-19 18:59:05,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:59:05,473 INFO L276 IsEmpty]: Start isEmpty. Operand 3557 states and 11709 transitions. [2021-02-19 18:59:05,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:59:05,478 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:59:05,478 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:59:05,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable264 [2021-02-19 18:59:05,678 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:59:05,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:59:05,679 INFO L82 PathProgramCache]: Analyzing trace with hash 956665750, now seen corresponding path program 47 times [2021-02-19 18:59:05,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:59:05,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406070834] [2021-02-19 18:59:05,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:59:05,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:59:06,054 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2021-02-19 18:59:06,396 WARN L202 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-02-19 18:59:06,734 WARN L202 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-02-19 18:59:07,187 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:59:07,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406070834] [2021-02-19 18:59:07,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068111861] [2021-02-19 18:59:07,187 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 [2021-02-19 18:59:07,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:59:07,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:59:07,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 18:59:07,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:59:08,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:59:08,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 47 [2021-02-19 18:59:08,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:59:08,563 WARN L202 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-02-19 18:59:08,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:59:08,661 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-02-19 18:59:08,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 43 [2021-02-19 18:59:08,667 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 18:59:08,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:59:08,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 18:59:08,686 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 18:59:08,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:59:08,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:59:08,964 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-02-19 18:59:08,966 INFO L354 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2021-02-19 18:59:08,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 82 [2021-02-19 18:59:09,007 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-02-19 18:59:09,503 WARN L202 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-02-19 18:59:09,505 INFO L628 ElimStorePlain]: treesize reduction 48, result has 62.2 percent of original size [2021-02-19 18:59:09,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:59:09,540 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:42, output treesize:161 [2021-02-19 18:59:10,281 WARN L202 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-02-19 18:59:10,994 WARN L202 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-02-19 18:59:11,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:59:11,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:59:11,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-02-19 18:59:11,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381590645] [2021-02-19 18:59:11,156 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:59:11,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:59:11,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:59:11,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:59:11,157 INFO L87 Difference]: Start difference. First operand 3557 states and 11709 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-02-19 18:59:11,460 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 18 [2021-02-19 18:59:11,743 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 21 [2021-02-19 18:59:12,145 WARN L202 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 39 [2021-02-19 18:59:12,552 WARN L202 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-02-19 18:59:13,751 WARN L202 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2021-02-19 18:59:14,192 WARN L202 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 41 [2021-02-19 18:59:14,585 WARN L202 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2021-02-19 18:59:15,192 WARN L202 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-02-19 18:59:15,661 WARN L202 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-02-19 18:59:16,073 WARN L202 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-02-19 18:59:17,607 WARN L202 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 95 DAG size of output: 83 [2021-02-19 18:59:17,826 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-02-19 18:59:19,075 WARN L202 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 97 DAG size of output: 89 [2021-02-19 18:59:19,606 WARN L202 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-02-19 18:59:20,225 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2021-02-19 18:59:20,637 WARN L202 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2021-02-19 18:59:21,684 WARN L202 SmtUtils]: Spent 676.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-02-19 18:59:22,638 WARN L202 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-02-19 18:59:23,278 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-02-19 18:59:23,625 WARN L202 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2021-02-19 18:59:23,939 WARN L202 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-02-19 18:59:24,360 WARN L202 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-02-19 18:59:24,867 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-02-19 18:59:25,631 WARN L202 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-02-19 18:59:25,900 WARN L202 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-02-19 18:59:27,513 WARN L202 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-02-19 18:59:29,684 WARN L202 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-02-19 18:59:30,236 WARN L202 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-02-19 18:59:30,971 WARN L202 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-02-19 18:59:31,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:59:31,098 INFO L93 Difference]: Finished difference Result 5170 states and 16610 transitions. [2021-02-19 18:59:31,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-02-19 18:59:31,103 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 30 [2021-02-19 18:59:31,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:59:31,112 INFO L225 Difference]: With dead ends: 5170 [2021-02-19 18:59:31,112 INFO L226 Difference]: Without dead ends: 5124 [2021-02-19 18:59:31,113 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1297 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=666, Invalid=3494, Unknown=0, NotChecked=0, Total=4160 [2021-02-19 18:59:31,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5124 states. [2021-02-19 18:59:31,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5124 to 3514. [2021-02-19 18:59:31,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3514 states, 3513 states have (on average 3.2894961571306576) internal successors, (11556), 3513 states have internal predecessors, (11556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:59:31,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3514 states to 3514 states and 11556 transitions. [2021-02-19 18:59:31,178 INFO L78 Accepts]: Start accepts. Automaton has 3514 states and 11556 transitions. Word has length 30 [2021-02-19 18:59:31,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:59:31,178 INFO L480 AbstractCegarLoop]: Abstraction has 3514 states and 11556 transitions. [2021-02-19 18:59:31,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-02-19 18:59:31,178 INFO L276 IsEmpty]: Start isEmpty. Operand 3514 states and 11556 transitions. [2021-02-19 18:59:31,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:59:31,202 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:59:31,202 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:59:31,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-02-19 18:59:31,403 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:59:31,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:59:31,403 INFO L82 PathProgramCache]: Analyzing trace with hash -2070116783, now seen corresponding path program 51 times [2021-02-19 18:59:31,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:59:31,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25696095] [2021-02-19 18:59:31,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:59:31,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:59:31,658 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2021-02-19 18:59:31,988 WARN L202 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2021-02-19 18:59:32,242 WARN L202 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-02-19 18:59:32,508 WARN L202 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-02-19 18:59:32,791 WARN L202 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-02-19 18:59:33,149 WARN L202 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2021-02-19 18:59:33,400 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 18 [2021-02-19 18:59:33,678 WARN L202 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-02-19 18:59:34,054 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:59:34,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25696095] [2021-02-19 18:59:34,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298210424] [2021-02-19 18:59:34,055 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 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 [2021-02-19 18:59:34,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:59:34,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:59:34,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:59:34,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:59:35,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:35,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:35,527 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:59:35,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 53 [2021-02-19 18:59:35,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 18:59:35,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:59:35,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:59:35,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:59:35,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-02-19 18:59:35,619 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-02-19 18:59:35,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:59:35,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:59:35,674 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:44, output treesize:19 [2021-02-19 18:59:36,022 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:59:36,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:59:36,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-02-19 18:59:36,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508375294] [2021-02-19 18:59:36,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-19 18:59:36,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:59:36,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-19 18:59:36,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-02-19 18:59:36,023 INFO L87 Difference]: Start difference. First operand 3514 states and 11556 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:59:36,538 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-02-19 18:59:36,786 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 18 [2021-02-19 18:59:37,380 WARN L202 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 26 [2021-02-19 18:59:37,643 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 25 [2021-02-19 18:59:37,926 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2021-02-19 18:59:38,313 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-02-19 18:59:38,661 WARN L202 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-02-19 18:59:39,075 WARN L202 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-02-19 18:59:39,561 WARN L202 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-02-19 18:59:40,088 WARN L202 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2021-02-19 18:59:40,566 WARN L202 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2021-02-19 18:59:40,898 WARN L202 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 32 [2021-02-19 18:59:41,531 WARN L202 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-02-19 18:59:42,037 WARN L202 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-02-19 18:59:42,532 WARN L202 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2021-02-19 18:59:42,957 WARN L202 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-02-19 18:59:43,856 WARN L202 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 22 [2021-02-19 18:59:44,258 WARN L202 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-02-19 18:59:44,562 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2021-02-19 18:59:45,056 WARN L202 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2021-02-19 18:59:45,676 WARN L202 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-02-19 18:59:46,021 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-02-19 18:59:46,451 WARN L202 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2021-02-19 18:59:48,311 WARN L202 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 40 [2021-02-19 18:59:48,590 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2021-02-19 18:59:49,127 WARN L202 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2021-02-19 18:59:49,793 WARN L202 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-02-19 18:59:50,377 WARN L202 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-02-19 18:59:51,294 WARN L202 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 32 [2021-02-19 18:59:51,972 WARN L202 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 24 [2021-02-19 18:59:52,645 WARN L202 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 36 [2021-02-19 18:59:53,851 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-02-19 18:59:54,178 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-02-19 18:59:54,660 WARN L202 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 26 [2021-02-19 18:59:55,693 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-02-19 18:59:55,935 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-02-19 18:59:56,251 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 29 [2021-02-19 18:59:56,758 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-02-19 18:59:57,518 WARN L202 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-02-19 18:59:57,901 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-02-19 18:59:58,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:59:58,803 INFO L93 Difference]: Finished difference Result 5147 states and 16262 transitions. [2021-02-19 18:59:58,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-02-19 18:59:58,809 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:59:58,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:59:58,819 INFO L225 Difference]: With dead ends: 5147 [2021-02-19 18:59:58,819 INFO L226 Difference]: Without dead ends: 5099 [2021-02-19 18:59:58,819 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1789 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=726, Invalid=5754, Unknown=0, NotChecked=0, Total=6480 [2021-02-19 18:59:58,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5099 states. [2021-02-19 18:59:58,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5099 to 3521. [2021-02-19 18:59:58,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3521 states, 3520 states have (on average 3.288352272727273) internal successors, (11575), 3520 states have internal predecessors, (11575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:59:58,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3521 states to 3521 states and 11575 transitions. [2021-02-19 18:59:58,894 INFO L78 Accepts]: Start accepts. Automaton has 3521 states and 11575 transitions. Word has length 30 [2021-02-19 18:59:58,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:59:58,895 INFO L480 AbstractCegarLoop]: Abstraction has 3521 states and 11575 transitions. [2021-02-19 18:59:58,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:59:58,895 INFO L276 IsEmpty]: Start isEmpty. Operand 3521 states and 11575 transitions. [2021-02-19 18:59:58,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:59:58,900 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:59:58,901 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:59:59,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable279,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:59:59,114 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:59:59,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:59:59,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1744373329, now seen corresponding path program 52 times [2021-02-19 18:59:59,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:59:59,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024930869] [2021-02-19 18:59:59,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:59:59,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:59:59,388 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2021-02-19 18:59:59,744 WARN L202 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2021-02-19 19:00:00,029 WARN L202 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-02-19 19:00:00,356 WARN L202 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-02-19 19:00:00,672 WARN L202 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-02-19 19:00:01,115 WARN L202 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2021-02-19 19:00:01,377 WARN L202 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 18 [2021-02-19 19:00:01,674 WARN L202 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-02-19 19:00:01,961 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:00:01,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024930869] [2021-02-19 19:00:01,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886629835] [2021-02-19 19:00:01,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:00:01,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:00:01,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:00:01,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:00:01,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:00:03,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:00:03,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:00:03,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:00:03,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:00:03,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-02-19 19:00:03,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:00:03,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:00:03,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:00:03,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:00:03,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:00:03,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:00:03,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-02-19 19:00:03,383 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:00:03,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:00:03,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 19:00:03,410 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-02-19 19:00:03,591 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:00:03,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:00:03,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-02-19 19:00:03,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475018804] [2021-02-19 19:00:03,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 19:00:03,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:00:03,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 19:00:03,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-02-19 19:00:03,592 INFO L87 Difference]: Start difference. First operand 3521 states and 11575 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 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) [2021-02-19 19:00:04,011 WARN L202 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-02-19 19:00:04,171 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 17 [2021-02-19 19:00:04,828 WARN L202 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-02-19 19:00:05,143 WARN L202 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2021-02-19 19:00:05,403 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-02-19 19:00:05,720 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 24 [2021-02-19 19:00:06,070 WARN L202 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-02-19 19:00:06,683 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-02-19 19:00:06,963 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2021-02-19 19:00:07,305 WARN L202 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-02-19 19:00:07,757 WARN L202 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-02-19 19:00:08,139 WARN L202 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-02-19 19:00:08,666 WARN L202 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-02-19 19:00:09,127 WARN L202 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-02-19 19:00:09,470 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-02-19 19:00:09,757 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-02-19 19:00:10,015 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-02-19 19:00:10,467 WARN L202 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-02-19 19:00:10,934 WARN L202 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-02-19 19:00:11,440 WARN L202 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-02-19 19:00:11,878 WARN L202 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-02-19 19:00:12,342 WARN L202 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-02-19 19:00:12,818 WARN L202 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-02-19 19:00:13,143 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-02-19 19:00:13,814 WARN L202 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-02-19 19:00:14,268 WARN L202 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-02-19 19:00:14,822 WARN L202 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-02-19 19:00:15,267 WARN L202 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-02-19 19:00:15,715 WARN L202 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2021-02-19 19:00:16,123 WARN L202 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-02-19 19:00:16,534 WARN L202 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-02-19 19:00:17,071 WARN L202 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2021-02-19 19:00:17,268 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-02-19 19:00:17,661 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-02-19 19:00:18,076 WARN L202 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-02-19 19:00:18,809 WARN L202 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-02-19 19:00:19,368 WARN L202 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-02-19 19:00:19,767 WARN L202 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 27 [2021-02-19 19:00:20,197 WARN L202 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-02-19 19:00:20,606 WARN L202 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-02-19 19:00:20,957 WARN L202 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2021-02-19 19:00:21,437 WARN L202 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 33 [2021-02-19 19:00:22,248 WARN L202 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-02-19 19:00:22,582 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-02-19 19:00:22,970 WARN L202 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-02-19 19:00:23,738 WARN L202 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-02-19 19:00:24,325 WARN L202 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2021-02-19 19:00:24,862 WARN L202 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-02-19 19:00:25,322 WARN L202 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-02-19 19:00:26,093 WARN L202 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2021-02-19 19:00:26,795 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-02-19 19:00:27,061 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-02-19 19:00:27,588 WARN L202 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2021-02-19 19:00:28,085 WARN L202 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-02-19 19:00:28,609 WARN L202 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-02-19 19:00:29,274 WARN L202 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 Received shutdown request... [2021-02-19 19:00:29,852 WARN L219 SmtUtils]: Removed 6 from assertion stack [2021-02-19 19:00:29,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-02-19 19:00:30,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable285 [2021-02-19 19:00:30,053 WARN L545 AbstractCegarLoop]: Verification canceled [2021-02-19 19:00:30,056 WARN L224 ceAbstractionStarter]: Timeout [2021-02-19 19:00:30,057 INFO L202 PluginConnector]: Adding new model array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 07:00:30 BasicIcfg [2021-02-19 19:00:30,057 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 19:00:30,057 INFO L168 Benchmark]: Toolchain (without parser) took 550605.35 ms. Allocated memory was 255.9 MB in the beginning and 423.6 MB in the end (delta: 167.8 MB). Free memory was 236.9 MB in the beginning and 319.2 MB in the end (delta: -82.3 MB). Peak memory consumption was 85.7 MB. Max. memory is 16.0 GB. [2021-02-19 19:00:30,057 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 255.9 MB. Free memory is still 238.2 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 19:00:30,057 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.24 ms. Allocated memory is still 255.9 MB. Free memory was 236.5 MB in the beginning and 234.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 19:00:30,057 INFO L168 Benchmark]: Boogie Preprocessor took 14.39 ms. Allocated memory is still 255.9 MB. Free memory was 234.9 MB in the beginning and 234.0 MB in the end (delta: 961.7 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 19:00:30,057 INFO L168 Benchmark]: RCFGBuilder took 249.40 ms. Allocated memory is still 255.9 MB. Free memory was 234.0 MB in the beginning and 239.0 MB in the end (delta: -5.0 MB). Peak memory consumption was 19.6 MB. Max. memory is 16.0 GB. [2021-02-19 19:00:30,057 INFO L168 Benchmark]: TraceAbstraction took 550312.21 ms. Allocated memory was 255.9 MB in the beginning and 423.6 MB in the end (delta: 167.8 MB). Free memory was 239.0 MB in the beginning and 319.2 MB in the end (delta: -80.2 MB). Peak memory consumption was 87.1 MB. Max. memory is 16.0 GB. [2021-02-19 19:00:30,058 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 0.14 ms. Allocated memory is still 255.9 MB. Free memory is still 238.2 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.24 ms. Allocated memory is still 255.9 MB. Free memory was 236.5 MB in the beginning and 234.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.39 ms. Allocated memory is still 255.9 MB. Free memory was 234.9 MB in the beginning and 234.0 MB in the end (delta: 961.7 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 249.40 ms. Allocated memory is still 255.9 MB. Free memory was 234.0 MB in the beginning and 239.0 MB in the end (delta: -5.0 MB). Peak memory consumption was 19.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 550312.21 ms. Allocated memory was 255.9 MB in the beginning and 423.6 MB in the end (delta: 167.8 MB). Free memory was 239.0 MB in the beginning and 319.2 MB in the end (delta: -80.2 MB). Peak memory consumption was 87.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 59). Cancelled while BasicCegarLoop was constructing difference of abstraction (3521states) and FLOYD_HOARE automaton (currently 72 states, 22 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 37 for 236ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 550.1s, OverallIterations: 102, TraceHistogramMax: 2, AutomataDifference: 420.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 4813 SDtfs, 28927 SDslu, 44846 SDs, 0 SdLazy, 95139 SolverSat, 7805 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 62.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6807 GetRequests, 2099 SyntacticMatches, 156 SemanticMatches, 4551 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79168 ImplicationChecksByTransitivity, 358.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3557occurred in iteration=99, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 4.3s AutomataMinimizationTime, 101 MinimizatonAttempts, 143401 StatesRemovedByMinimization, 101 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 101.6s InterpolantComputationTime, 5736 NumberOfCodeBlocks, 5736 NumberOfCodeBlocksAsserted, 320 NumberOfCheckSat, 5535 ConstructedInterpolants, 172 QuantifiedInterpolants, 2699396 SizeOfPredicates, 662 NumberOfNonLiveVariables, 6314 ConjunctsInSsa, 1799 ConjunctsInUnsatCore, 201 InterpolantComputations, 3 PerfectInterpolantSequences, 135/1348 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