/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 23:26:51,133 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 23:26:51,134 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 23:26:51,166 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-10 23:26:51,167 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-10 23:26:51,169 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-10 23:26:51,171 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-10 23:26:51,175 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-10 23:26:51,177 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-10 23:26:51,180 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-10 23:26:51,181 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-10 23:26:51,182 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-10 23:26:51,182 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-10 23:26:51,183 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-10 23:26:51,184 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-10 23:26:51,185 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-10 23:26:51,189 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-10 23:26:51,189 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-10 23:26:51,191 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-10 23:26:51,199 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-10 23:26:51,200 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-10 23:26:51,201 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-10 23:26:51,201 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-10 23:26:51,202 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-10 23:26:51,203 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-03-10 23:26:51,203 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-03-10 23:26:51,204 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-03-10 23:26:51,204 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-03-10 23:26:51,204 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-03-10 23:26:51,205 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-03-10 23:26:51,205 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-10 23:26:51,205 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-10 23:26:51,206 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-10 23:26:51,206 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-10 23:26:51,207 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-10 23:26:51,207 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-10 23:26:51,207 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-10 23:26:51,207 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-10 23:26:51,208 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-10 23:26:51,208 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-10 23:26:51,208 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-10 23:26:51,209 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 [2021-03-10 23:26:51,225 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 23:26:51,225 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 23:26:51,225 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 23:26:51,225 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 23:26:51,226 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 23:26:51,226 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 23:26:51,227 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 23:26:51,227 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 23:26:51,227 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 23:26:51,227 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 23:26:51,227 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 23:26:51,227 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 23:26:51,227 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 23:26:51,227 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 23:26:51,227 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 23:26:51,227 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 23:26:51,228 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 23:26:51,228 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 23:26:51,228 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 23:26:51,228 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 23:26:51,228 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 23:26:51,228 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 23:26:51,228 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 23:26:51,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 23:26:51,228 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 23:26:51,228 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 23:26:51,229 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 23:26:51,229 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 23:26:51,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 23:26:51,229 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 23:26:51,229 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 23:26:51,229 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 23:26:51,461 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 23:26:51,487 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 23:26:51,489 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 23:26:51,489 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 23:26:51,491 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 23:26:51,492 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-2.wvr.bpl [2021-03-10 23:26:51,493 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-2.wvr.bpl' [2021-03-10 23:26:51,536 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 23:26:51,541 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 23:26:51,543 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 23:26:51,543 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 23:26:51,543 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 23:26:51,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:26:51" (1/1) ... [2021-03-10 23:26:51,564 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:26:51" (1/1) ... [2021-03-10 23:26:51,570 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 23:26:51,571 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 23:26:51,572 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 23:26:51,572 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 23:26:51,577 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:26:51" (1/1) ... [2021-03-10 23:26:51,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:26:51" (1/1) ... [2021-03-10 23:26:51,592 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:26:51" (1/1) ... [2021-03-10 23:26:51,592 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:26:51" (1/1) ... [2021-03-10 23:26:51,600 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:26:51" (1/1) ... [2021-03-10 23:26:51,603 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:26:51" (1/1) ... [2021-03-10 23:26:51,604 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:26:51" (1/1) ... [2021-03-10 23:26:51,605 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 23:26:51,605 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 23:26:51,606 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 23:26:51,606 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 23:26:51,607 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:26:51" (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 [2021-03-10 23:26:51,658 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 23:26:51,659 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 23:26:51,659 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 23:26:51,659 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 23:26:51,659 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 23:26:51,659 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 23:26:51,659 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 23:26:51,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 23:26:51,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 23:26:51,659 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-10 23:26:51,660 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-10 23:26:51,660 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-10 23:26:51,660 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-03-10 23:26:51,661 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-03-10 23:26:51,661 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-03-10 23:26:51,662 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 23:26:52,146 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 23:26:52,146 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-03-10 23:26:52,147 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-03-10 23:26:52,147 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-03-10 23:26:52,149 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-03-10 23:26:52,149 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread4EXIT is neither atomic block end nor error location. [2021-03-10 23:26:52,150 INFO L202 PluginConnector]: Adding new model commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 11:26:52 BoogieIcfgContainer [2021-03-10 23:26:52,151 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 23:26:52,153 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 23:26:52,154 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 23:26:52,156 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 23:26:52,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:26:51" (1/2) ... [2021-03-10 23:26:52,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c35b64b and model type commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 11:26:52, skipping insertion in model container [2021-03-10 23:26:52,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 11:26:52" (2/2) ... [2021-03-10 23:26:52,161 INFO L111 eAbstractionObserver]: Analyzing ICFG commit-2.wvr.bpl [2021-03-10 23:26:52,165 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 23:26:52,165 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 23:26:52,169 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 23:26:52,169 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 23:26:52,209 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-03-10 23:26:52,222 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-03-10 23:26:52,250 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 23:26:52,250 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 23:26:52,250 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 23:26:52,250 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 23:26:52,250 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 23:26:52,250 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 23:26:52,250 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 23:26:52,250 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 23:26:52,258 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 25 transitions, 82 flow [2021-03-10 23:26:52,267 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 51 states, 49 states have (on average 3.4081632653061225) internal successors, (167), 50 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:52,268 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 49 states have (on average 3.4081632653061225) internal successors, (167), 50 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:52,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 23:26:52,273 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:52,274 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:52,274 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:52,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:52,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1687097808, now seen corresponding path program 1 times [2021-03-10 23:26:52,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:52,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907136174] [2021-03-10 23:26:52,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:52,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:52,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:52,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907136174] [2021-03-10 23:26:52,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:26:52,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-10 23:26:52,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634406810] [2021-03-10 23:26:52,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 23:26:52,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:52,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 23:26:52,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 23:26:52,412 INFO L87 Difference]: Start difference. First operand has 51 states, 49 states have (on average 3.4081632653061225) internal successors, (167), 50 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:52,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:52,444 INFO L93 Difference]: Finished difference Result 94 states and 326 transitions. [2021-03-10 23:26:52,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 23:26:52,445 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 23:26:52,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:52,455 INFO L225 Difference]: With dead ends: 94 [2021-03-10 23:26:52,455 INFO L226 Difference]: Without dead ends: 89 [2021-03-10 23:26:52,456 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 23:26:52,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-03-10 23:26:52,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-03-10 23:26:52,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 3.5454545454545454) internal successors, (312), 88 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:52,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 312 transitions. [2021-03-10 23:26:52,497 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 312 transitions. Word has length 15 [2021-03-10 23:26:52,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:52,498 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 312 transitions. [2021-03-10 23:26:52,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:52,498 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 312 transitions. [2021-03-10 23:26:52,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 23:26:52,499 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:52,499 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:52,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 23:26:52,500 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:52,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:52,501 INFO L82 PathProgramCache]: Analyzing trace with hash -759854521, now seen corresponding path program 1 times [2021-03-10 23:26:52,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:52,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146054858] [2021-03-10 23:26:52,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:52,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:52,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:52,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146054858] [2021-03-10 23:26:52,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582084967] [2021-03-10 23:26:52,578 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 [2021-03-10 23:26:52,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:52,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 23:26:52,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:26:52,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:52,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:26:52,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-03-10 23:26:52,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320011907] [2021-03-10 23:26:52,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 23:26:52,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:52,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 23:26:52,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-10 23:26:52,737 INFO L87 Difference]: Start difference. First operand 89 states and 312 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:52,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:52,769 INFO L93 Difference]: Finished difference Result 120 states and 425 transitions. [2021-03-10 23:26:52,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 23:26:52,770 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 23:26:52,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:52,771 INFO L225 Difference]: With dead ends: 120 [2021-03-10 23:26:52,772 INFO L226 Difference]: Without dead ends: 106 [2021-03-10 23:26:52,772 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.8ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-10 23:26:52,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-03-10 23:26:52,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2021-03-10 23:26:52,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 3.5542168674698793) internal successors, (295), 83 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:52,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 295 transitions. [2021-03-10 23:26:52,783 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 295 transitions. Word has length 16 [2021-03-10 23:26:52,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:52,783 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 295 transitions. [2021-03-10 23:26:52,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:52,783 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 295 transitions. [2021-03-10 23:26:52,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 23:26:52,784 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:52,784 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:52,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-03-10 23:26:52,985 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:52,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:52,986 INFO L82 PathProgramCache]: Analyzing trace with hash -263000223, now seen corresponding path program 1 times [2021-03-10 23:26:52,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:52,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984083375] [2021-03-10 23:26:52,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:52,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:53,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:53,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984083375] [2021-03-10 23:26:53,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:26:53,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-10 23:26:53,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051152866] [2021-03-10 23:26:53,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 23:26:53,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:53,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 23:26:53,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 23:26:53,026 INFO L87 Difference]: Start difference. First operand 84 states and 295 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:53,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:53,036 INFO L93 Difference]: Finished difference Result 129 states and 418 transitions. [2021-03-10 23:26:53,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 23:26:53,036 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 23:26:53,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:53,037 INFO L225 Difference]: With dead ends: 129 [2021-03-10 23:26:53,037 INFO L226 Difference]: Without dead ends: 121 [2021-03-10 23:26:53,038 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 23:26:53,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-03-10 23:26:53,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 98. [2021-03-10 23:26:53,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 3.4742268041237114) internal successors, (337), 97 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:53,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 337 transitions. [2021-03-10 23:26:53,048 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 337 transitions. Word has length 16 [2021-03-10 23:26:53,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:53,048 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 337 transitions. [2021-03-10 23:26:53,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:53,048 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 337 transitions. [2021-03-10 23:26:53,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 23:26:53,049 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:53,049 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:53,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 23:26:53,049 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:53,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:53,050 INFO L82 PathProgramCache]: Analyzing trace with hash 675491683, now seen corresponding path program 1 times [2021-03-10 23:26:53,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:53,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679111834] [2021-03-10 23:26:53,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:53,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:53,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:53,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679111834] [2021-03-10 23:26:53,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:26:53,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-10 23:26:53,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598004866] [2021-03-10 23:26:53,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 23:26:53,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:53,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 23:26:53,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 23:26:53,094 INFO L87 Difference]: Start difference. First operand 98 states and 337 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:53,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:53,125 INFO L93 Difference]: Finished difference Result 76 states and 237 transitions. [2021-03-10 23:26:53,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 23:26:53,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 23:26:53,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:53,126 INFO L225 Difference]: With dead ends: 76 [2021-03-10 23:26:53,126 INFO L226 Difference]: Without dead ends: 64 [2021-03-10 23:26:53,127 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 23:26:53,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-03-10 23:26:53,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-03-10 23:26:53,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 3.3015873015873014) internal successors, (208), 63 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:53,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 208 transitions. [2021-03-10 23:26:53,131 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 208 transitions. Word has length 16 [2021-03-10 23:26:53,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:53,131 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 208 transitions. [2021-03-10 23:26:53,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:53,131 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 208 transitions. [2021-03-10 23:26:53,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 23:26:53,132 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:53,132 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:53,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-10 23:26:53,132 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:53,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:53,132 INFO L82 PathProgramCache]: Analyzing trace with hash 135060591, now seen corresponding path program 1 times [2021-03-10 23:26:53,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:53,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130532845] [2021-03-10 23:26:53,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:53,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:53,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:53,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130532845] [2021-03-10 23:26:53,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337477859] [2021-03-10 23:26:53,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:26:53,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:53,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 23:26:53,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:26:53,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:53,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:26:53,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-03-10 23:26:53,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790765073] [2021-03-10 23:26:53,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 23:26:53,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:53,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 23:26:53,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-10 23:26:53,317 INFO L87 Difference]: Start difference. First operand 64 states and 208 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:53,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:53,333 INFO L93 Difference]: Finished difference Result 115 states and 389 transitions. [2021-03-10 23:26:53,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 23:26:53,333 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 23:26:53,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:53,334 INFO L225 Difference]: With dead ends: 115 [2021-03-10 23:26:53,334 INFO L226 Difference]: Without dead ends: 108 [2021-03-10 23:26:53,335 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.2ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-10 23:26:53,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-03-10 23:26:53,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-03-10 23:26:53,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 3.4299065420560746) internal successors, (367), 107 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:53,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 367 transitions. [2021-03-10 23:26:53,340 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 367 transitions. Word has length 16 [2021-03-10 23:26:53,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:53,340 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 367 transitions. [2021-03-10 23:26:53,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:53,341 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 367 transitions. [2021-03-10 23:26:53,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 23:26:53,341 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:53,342 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:53,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:26:53,557 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:53,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:53,557 INFO L82 PathProgramCache]: Analyzing trace with hash -107519000, now seen corresponding path program 1 times [2021-03-10 23:26:53,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:53,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407436850] [2021-03-10 23:26:53,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:53,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:53,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:53,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407436850] [2021-03-10 23:26:53,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604655809] [2021-03-10 23:26:53,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:26:53,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:53,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2021-03-10 23:26:53,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:26:53,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:26:53,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-03-10 23:26:53,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-03-10 23:26:53,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694568181] [2021-03-10 23:26:53,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 23:26:53,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:53,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 23:26:53,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-10 23:26:53,687 INFO L87 Difference]: Start difference. First operand 108 states and 367 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:53,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:53,694 INFO L93 Difference]: Finished difference Result 57 states and 166 transitions. [2021-03-10 23:26:53,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 23:26:53,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 23:26:53,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:53,695 INFO L225 Difference]: With dead ends: 57 [2021-03-10 23:26:53,696 INFO L226 Difference]: Without dead ends: 54 [2021-03-10 23:26:53,696 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 22.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-10 23:26:53,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-03-10 23:26:53,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-03-10 23:26:53,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 3.0377358490566038) internal successors, (161), 53 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:53,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 161 transitions. [2021-03-10 23:26:53,699 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 161 transitions. Word has length 17 [2021-03-10 23:26:53,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:53,699 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 161 transitions. [2021-03-10 23:26:53,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:53,699 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 161 transitions. [2021-03-10 23:26:53,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 23:26:53,700 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:53,700 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:53,907 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:26:53,908 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:53,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:53,908 INFO L82 PathProgramCache]: Analyzing trace with hash -2041236514, now seen corresponding path program 2 times [2021-03-10 23:26:53,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:53,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820000600] [2021-03-10 23:26:53,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:53,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:53,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:53,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820000600] [2021-03-10 23:26:53,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083393764] [2021-03-10 23:26:53,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:26:53,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:26:53,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:26:53,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 23:26:53,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:26:54,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:54,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:26:54,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-03-10 23:26:54,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324784935] [2021-03-10 23:26:54,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 23:26:54,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:54,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 23:26:54,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-03-10 23:26:54,071 INFO L87 Difference]: Start difference. First operand 54 states and 161 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:54,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:54,109 INFO L93 Difference]: Finished difference Result 93 states and 298 transitions. [2021-03-10 23:26:54,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 23:26:54,109 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 23:26:54,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:54,110 INFO L225 Difference]: With dead ends: 93 [2021-03-10 23:26:54,110 INFO L226 Difference]: Without dead ends: 88 [2021-03-10 23:26:54,111 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-03-10 23:26:54,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-03-10 23:26:54,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-03-10 23:26:54,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 3.2906976744186047) internal successors, (283), 86 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:54,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 283 transitions. [2021-03-10 23:26:54,128 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 283 transitions. Word has length 17 [2021-03-10 23:26:54,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:54,128 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 283 transitions. [2021-03-10 23:26:54,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:54,129 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 283 transitions. [2021-03-10 23:26:54,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 23:26:54,129 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:54,129 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:54,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:26:54,347 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:54,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:54,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1146747481, now seen corresponding path program 3 times [2021-03-10 23:26:54,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:54,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298561759] [2021-03-10 23:26:54,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:54,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:54,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:54,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298561759] [2021-03-10 23:26:54,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266083643] [2021-03-10 23:26:54,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:26:54,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:26:54,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:26:54,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 23:26:54,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:26:54,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:54,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:26:54,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-03-10 23:26:54,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114440225] [2021-03-10 23:26:54,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 23:26:54,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:54,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 23:26:54,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:26:54,669 INFO L87 Difference]: Start difference. First operand 87 states and 283 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:54,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:54,778 INFO L93 Difference]: Finished difference Result 144 states and 469 transitions. [2021-03-10 23:26:54,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 23:26:54,778 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 23:26:54,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:54,779 INFO L225 Difference]: With dead ends: 144 [2021-03-10 23:26:54,779 INFO L226 Difference]: Without dead ends: 135 [2021-03-10 23:26:54,779 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 144.6ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:26:54,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-03-10 23:26:54,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 106. [2021-03-10 23:26:54,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 3.5238095238095237) internal successors, (370), 105 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:54,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 370 transitions. [2021-03-10 23:26:54,783 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 370 transitions. Word has length 18 [2021-03-10 23:26:54,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:54,783 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 370 transitions. [2021-03-10 23:26:54,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:54,783 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 370 transitions. [2021-03-10 23:26:54,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 23:26:54,784 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:54,784 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:54,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:26:54,995 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:54,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:54,996 INFO L82 PathProgramCache]: Analyzing trace with hash 613124629, now seen corresponding path program 4 times [2021-03-10 23:26:54,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:54,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972718562] [2021-03-10 23:26:54,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:55,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:55,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:55,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972718562] [2021-03-10 23:26:55,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980358862] [2021-03-10 23:26:55,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:26:55,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:26:55,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:26:55,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 23:26:55,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:26:55,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:55,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:26:55,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-03-10 23:26:55,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514521113] [2021-03-10 23:26:55,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 23:26:55,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:55,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 23:26:55,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:26:55,240 INFO L87 Difference]: Start difference. First operand 106 states and 370 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:55,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:55,283 INFO L93 Difference]: Finished difference Result 179 states and 628 transitions. [2021-03-10 23:26:55,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 23:26:55,283 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 23:26:55,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:55,285 INFO L225 Difference]: With dead ends: 179 [2021-03-10 23:26:55,285 INFO L226 Difference]: Without dead ends: 169 [2021-03-10 23:26:55,285 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 89.2ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-03-10 23:26:55,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-03-10 23:26:55,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 133. [2021-03-10 23:26:55,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 3.7196969696969697) internal successors, (491), 132 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:55,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 491 transitions. [2021-03-10 23:26:55,293 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 491 transitions. Word has length 18 [2021-03-10 23:26:55,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:55,294 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 491 transitions. [2021-03-10 23:26:55,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:55,294 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 491 transitions. [2021-03-10 23:26:55,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 23:26:55,298 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:55,298 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:55,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:26:55,508 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:55,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:55,509 INFO L82 PathProgramCache]: Analyzing trace with hash 64866445, now seen corresponding path program 1 times [2021-03-10 23:26:55,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:55,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206584507] [2021-03-10 23:26:55,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:55,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:55,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:55,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206584507] [2021-03-10 23:26:55,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928744530] [2021-03-10 23:26:55,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:26:55,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:55,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 23:26:55,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:26:55,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:55,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:26:55,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2021-03-10 23:26:55,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009772190] [2021-03-10 23:26:55,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 23:26:55,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:55,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 23:26:55,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 23:26:55,762 INFO L87 Difference]: Start difference. First operand 133 states and 491 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:55,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:55,849 INFO L93 Difference]: Finished difference Result 260 states and 963 transitions. [2021-03-10 23:26:55,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 23:26:55,849 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 23:26:55,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:55,851 INFO L225 Difference]: With dead ends: 260 [2021-03-10 23:26:55,851 INFO L226 Difference]: Without dead ends: 249 [2021-03-10 23:26:55,851 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 116.1ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:26:55,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-03-10 23:26:55,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 174. [2021-03-10 23:26:55,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 4.005780346820809) internal successors, (693), 173 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:55,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 693 transitions. [2021-03-10 23:26:55,857 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 693 transitions. Word has length 18 [2021-03-10 23:26:55,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:55,857 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 693 transitions. [2021-03-10 23:26:55,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:55,858 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 693 transitions. [2021-03-10 23:26:55,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 23:26:55,858 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:55,858 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:56,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:26:56,072 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:56,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:56,072 INFO L82 PathProgramCache]: Analyzing trace with hash 764509993, now seen corresponding path program 1 times [2021-03-10 23:26:56,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:56,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097001143] [2021-03-10 23:26:56,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:56,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:56,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:56,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097001143] [2021-03-10 23:26:56,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932062951] [2021-03-10 23:26:56,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-03-10 23:26:56,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:56,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 23:26:56,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:26:56,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:56,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:26:56,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-03-10 23:26:56,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140825379] [2021-03-10 23:26:56,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 23:26:56,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:56,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 23:26:56,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-10 23:26:56,273 INFO L87 Difference]: Start difference. First operand 174 states and 693 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:56,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:56,335 INFO L93 Difference]: Finished difference Result 176 states and 684 transitions. [2021-03-10 23:26:56,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 23:26:56,336 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 23:26:56,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:56,338 INFO L225 Difference]: With dead ends: 176 [2021-03-10 23:26:56,338 INFO L226 Difference]: Without dead ends: 168 [2021-03-10 23:26:56,338 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 23:26:56,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-03-10 23:26:56,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2021-03-10 23:26:56,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 4.0) internal successors, (668), 167 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:56,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 668 transitions. [2021-03-10 23:26:56,344 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 668 transitions. Word has length 18 [2021-03-10 23:26:56,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:56,344 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 668 transitions. [2021-03-10 23:26:56,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:56,344 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 668 transitions. [2021-03-10 23:26:56,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 23:26:56,344 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:56,344 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:56,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-03-10 23:26:56,564 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:56,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:56,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1447544248, now seen corresponding path program 2 times [2021-03-10 23:26:56,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:56,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026117102] [2021-03-10 23:26:56,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:56,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:56,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:56,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026117102] [2021-03-10 23:26:56,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234172915] [2021-03-10 23:26:56,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:26:56,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:26:56,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:26:56,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 23:26:56,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:26:56,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:56,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:26:56,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-03-10 23:26:56,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177451492] [2021-03-10 23:26:56,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 23:26:56,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:56,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 23:26:56,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-03-10 23:26:56,891 INFO L87 Difference]: Start difference. First operand 168 states and 668 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:57,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:57,090 INFO L93 Difference]: Finished difference Result 377 states and 1547 transitions. [2021-03-10 23:26:57,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 23:26:57,090 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 23:26:57,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:57,093 INFO L225 Difference]: With dead ends: 377 [2021-03-10 23:26:57,093 INFO L226 Difference]: Without dead ends: 372 [2021-03-10 23:26:57,093 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 238.3ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 23:26:57,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-03-10 23:26:57,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 222. [2021-03-10 23:26:57,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 4.398190045248869) internal successors, (972), 221 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:57,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 972 transitions. [2021-03-10 23:26:57,102 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 972 transitions. Word has length 19 [2021-03-10 23:26:57,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:57,103 INFO L480 AbstractCegarLoop]: Abstraction has 222 states and 972 transitions. [2021-03-10 23:26:57,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:57,103 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 972 transitions. [2021-03-10 23:26:57,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 23:26:57,104 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:57,104 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:57,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-03-10 23:26:57,321 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:57,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:57,321 INFO L82 PathProgramCache]: Analyzing trace with hash 820488117, now seen corresponding path program 5 times [2021-03-10 23:26:57,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:57,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417069817] [2021-03-10 23:26:57,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:57,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:57,395 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:57,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417069817] [2021-03-10 23:26:57,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533592193] [2021-03-10 23:26:57,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:26:57,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:26:57,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:26:57,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 23:26:57,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:26:57,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-03-10 23:26:57,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:26:57,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-03-10 23:26:57,519 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:26:57,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:26:57,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 23:26:57,542 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:57 [2021-03-10 23:26:57,627 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:26:57,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:26:57,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-03-10 23:26:57,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754968367] [2021-03-10 23:26:57,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 23:26:57,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:57,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 23:26:57,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:26:57,629 INFO L87 Difference]: Start difference. First operand 222 states and 972 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:57,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:57,800 INFO L93 Difference]: Finished difference Result 416 states and 1719 transitions. [2021-03-10 23:26:57,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 23:26:57,800 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 23:26:57,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:57,802 INFO L225 Difference]: With dead ends: 416 [2021-03-10 23:26:57,802 INFO L226 Difference]: Without dead ends: 407 [2021-03-10 23:26:57,803 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 207.7ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:26:57,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-03-10 23:26:57,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 260. [2021-03-10 23:26:57,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 4.463320463320463) internal successors, (1156), 259 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:57,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 1156 transitions. [2021-03-10 23:26:57,812 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 1156 transitions. Word has length 20 [2021-03-10 23:26:57,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:57,812 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 1156 transitions. [2021-03-10 23:26:57,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:57,812 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 1156 transitions. [2021-03-10 23:26:57,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 23:26:57,813 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:57,813 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:58,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:26:58,027 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:58,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:58,028 INFO L82 PathProgramCache]: Analyzing trace with hash 924426037, now seen corresponding path program 6 times [2021-03-10 23:26:58,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:58,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290446561] [2021-03-10 23:26:58,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:58,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:58,126 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:58,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290446561] [2021-03-10 23:26:58,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851435056] [2021-03-10 23:26:58,127 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:26:58,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:26:58,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:26:58,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 23:26:58,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:26:58,268 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:58,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:26:58,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-03-10 23:26:58,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140190873] [2021-03-10 23:26:58,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:26:58,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:58,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:26:58,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:26:58,271 INFO L87 Difference]: Start difference. First operand 260 states and 1156 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:58,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:58,333 INFO L93 Difference]: Finished difference Result 287 states and 1222 transitions. [2021-03-10 23:26:58,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 23:26:58,333 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 23:26:58,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:58,335 INFO L225 Difference]: With dead ends: 287 [2021-03-10 23:26:58,335 INFO L226 Difference]: Without dead ends: 283 [2021-03-10 23:26:58,335 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 116.4ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:26:58,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-03-10 23:26:58,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 260. [2021-03-10 23:26:58,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 4.413127413127413) internal successors, (1143), 259 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) [2021-03-10 23:26:58,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 1143 transitions. [2021-03-10 23:26:58,342 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 1143 transitions. Word has length 20 [2021-03-10 23:26:58,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:58,342 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 1143 transitions. [2021-03-10 23:26:58,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:58,342 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 1143 transitions. [2021-03-10 23:26:58,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 23:26:58,343 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:58,343 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:58,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-03-10 23:26:58,559 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:58,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:58,559 INFO L82 PathProgramCache]: Analyzing trace with hash -257751127, now seen corresponding path program 2 times [2021-03-10 23:26:58,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:58,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897279657] [2021-03-10 23:26:58,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:58,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:58,637 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:58,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897279657] [2021-03-10 23:26:58,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359604623] [2021-03-10 23:26:58,637 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:26:58,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:26:58,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:26:58,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 23:26:58,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:26:58,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-03-10 23:26:58,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:26:58,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-03-10 23:26:58,777 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:26:58,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:26:58,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 23:26:58,800 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:57 [2021-03-10 23:26:58,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:26:58,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:26:58,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-03-10 23:26:58,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861213164] [2021-03-10 23:26:58,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 23:26:58,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:58,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 23:26:58,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:26:58,895 INFO L87 Difference]: Start difference. First operand 260 states and 1143 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 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) [2021-03-10 23:26:59,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:59,078 INFO L93 Difference]: Finished difference Result 456 states and 1883 transitions. [2021-03-10 23:26:59,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 23:26:59,078 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 23:26:59,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:59,083 INFO L225 Difference]: With dead ends: 456 [2021-03-10 23:26:59,083 INFO L226 Difference]: Without dead ends: 445 [2021-03-10 23:26:59,084 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 231.0ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:26:59,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-03-10 23:26:59,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 289. [2021-03-10 23:26:59,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 4.489583333333333) internal successors, (1293), 288 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:59,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 1293 transitions. [2021-03-10 23:26:59,094 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 1293 transitions. Word has length 20 [2021-03-10 23:26:59,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:59,094 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 1293 transitions. [2021-03-10 23:26:59,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 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) [2021-03-10 23:26:59,095 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 1293 transitions. [2021-03-10 23:26:59,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 23:26:59,096 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:59,096 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:59,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:26:59,312 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:59,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:59,313 INFO L82 PathProgramCache]: Analyzing trace with hash -626942165, now seen corresponding path program 3 times [2021-03-10 23:26:59,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:59,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483128802] [2021-03-10 23:26:59,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:59,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:59,375 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:59,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483128802] [2021-03-10 23:26:59,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569866364] [2021-03-10 23:26:59,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:26:59,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:26:59,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:26:59,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 23:26:59,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:26:59,653 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:59,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:26:59,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-03-10 23:26:59,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428594963] [2021-03-10 23:26:59,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 23:26:59,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:59,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 23:26:59,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:26:59,654 INFO L87 Difference]: Start difference. First operand 289 states and 1293 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:59,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:59,852 INFO L93 Difference]: Finished difference Result 536 states and 2256 transitions. [2021-03-10 23:26:59,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 23:26:59,852 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 23:26:59,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:59,855 INFO L225 Difference]: With dead ends: 536 [2021-03-10 23:26:59,855 INFO L226 Difference]: Without dead ends: 531 [2021-03-10 23:26:59,855 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 264.3ms TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:26:59,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-03-10 23:26:59,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 316. [2021-03-10 23:26:59,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 4.584126984126984) internal successors, (1444), 315 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:59,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 1444 transitions. [2021-03-10 23:26:59,866 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 1444 transitions. Word has length 20 [2021-03-10 23:26:59,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:59,866 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 1444 transitions. [2021-03-10 23:26:59,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:59,867 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 1444 transitions. [2021-03-10 23:26:59,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 23:26:59,868 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:59,868 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:00,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-03-10 23:27:00,083 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:00,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:00,084 INFO L82 PathProgramCache]: Analyzing trace with hash -760999699, now seen corresponding path program 4 times [2021-03-10 23:27:00,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:00,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319469136] [2021-03-10 23:27:00,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:00,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:00,188 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:00,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319469136] [2021-03-10 23:27:00,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438425238] [2021-03-10 23:27:00,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:00,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:27:00,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:00,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 23:27:00,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:00,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:00,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:00,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-03-10 23:27:00,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043680416] [2021-03-10 23:27:00,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 23:27:00,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:00,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 23:27:00,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:27:00,333 INFO L87 Difference]: Start difference. First operand 316 states and 1444 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:00,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:00,517 INFO L93 Difference]: Finished difference Result 445 states and 1897 transitions. [2021-03-10 23:27:00,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 23:27:00,517 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 23:27:00,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:00,520 INFO L225 Difference]: With dead ends: 445 [2021-03-10 23:27:00,520 INFO L226 Difference]: Without dead ends: 435 [2021-03-10 23:27:00,521 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 223.8ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:27:00,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-03-10 23:27:00,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 335. [2021-03-10 23:27:00,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 4.604790419161676) internal successors, (1538), 334 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:00,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1538 transitions. [2021-03-10 23:27:00,532 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1538 transitions. Word has length 20 [2021-03-10 23:27:00,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:00,533 INFO L480 AbstractCegarLoop]: Abstraction has 335 states and 1538 transitions. [2021-03-10 23:27:00,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:00,534 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1538 transitions. [2021-03-10 23:27:00,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 23:27:00,535 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:00,535 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:00,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:00,752 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:00,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:00,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1175269464, now seen corresponding path program 7 times [2021-03-10 23:27:00,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:00,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344497772] [2021-03-10 23:27:00,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:00,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:00,863 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:27:00,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344497772] [2021-03-10 23:27:00,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223836284] [2021-03-10 23:27:00,864 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 23:27:00,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:00,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 23:27:00,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:01,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-03-10 23:27:01,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:27:01,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-03-10 23:27:01,011 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:27:01,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:01,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-03-10 23:27:01,039 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:27:01,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-03-10 23:27:01,044 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:27:01,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:01,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 23:27:01,068 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:85, output treesize:57 [2021-03-10 23:27:01,137 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:27:01,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:01,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-03-10 23:27:01,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443131424] [2021-03-10 23:27:01,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 23:27:01,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:01,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 23:27:01,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:27:01,149 INFO L87 Difference]: Start difference. First operand 335 states and 1538 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:01,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:01,322 INFO L93 Difference]: Finished difference Result 466 states and 1917 transitions. [2021-03-10 23:27:01,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 23:27:01,322 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 23:27:01,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:01,326 INFO L225 Difference]: With dead ends: 466 [2021-03-10 23:27:01,326 INFO L226 Difference]: Without dead ends: 452 [2021-03-10 23:27:01,326 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 282.4ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:27:01,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-03-10 23:27:01,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 368. [2021-03-10 23:27:01,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 4.405994550408719) internal successors, (1617), 367 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:01,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1617 transitions. [2021-03-10 23:27:01,337 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1617 transitions. Word has length 21 [2021-03-10 23:27:01,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:01,337 INFO L480 AbstractCegarLoop]: Abstraction has 368 states and 1617 transitions. [2021-03-10 23:27:01,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:01,338 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1617 transitions. [2021-03-10 23:27:01,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 23:27:01,339 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:01,339 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:01,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:01,551 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:01,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:01,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1429441592, now seen corresponding path program 3 times [2021-03-10 23:27:01,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:01,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118816197] [2021-03-10 23:27:01,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:01,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:01,628 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:01,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118816197] [2021-03-10 23:27:01,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536817535] [2021-03-10 23:27:01,628 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 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 [2021-03-10 23:27:01,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:27:01,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:01,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 23:27:01,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:01,810 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:01,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:01,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 23:27:01,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004272789] [2021-03-10 23:27:01,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 23:27:01,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:01,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 23:27:01,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-03-10 23:27:01,813 INFO L87 Difference]: Start difference. First operand 368 states and 1617 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:01,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:01,987 INFO L93 Difference]: Finished difference Result 398 states and 1680 transitions. [2021-03-10 23:27:01,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 23:27:01,987 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 23:27:01,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:01,989 INFO L225 Difference]: With dead ends: 398 [2021-03-10 23:27:01,989 INFO L226 Difference]: Without dead ends: 396 [2021-03-10 23:27:01,990 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 273.4ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:27:01,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-03-10 23:27:01,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 372. [2021-03-10 23:27:02,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 4.380053908355795) internal successors, (1625), 371 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:02,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1625 transitions. [2021-03-10 23:27:02,001 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1625 transitions. Word has length 21 [2021-03-10 23:27:02,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:02,001 INFO L480 AbstractCegarLoop]: Abstraction has 372 states and 1625 transitions. [2021-03-10 23:27:02,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:02,002 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1625 transitions. [2021-03-10 23:27:02,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 23:27:02,003 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:02,003 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:02,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:02,220 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:02,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:02,221 INFO L82 PathProgramCache]: Analyzing trace with hash -958081368, now seen corresponding path program 5 times [2021-03-10 23:27:02,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:02,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078277760] [2021-03-10 23:27:02,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:02,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:02,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:02,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078277760] [2021-03-10 23:27:02,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53044851] [2021-03-10 23:27:02,310 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:02,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:27:02,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:02,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 23:27:02,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:02,505 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:02,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:02,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-03-10 23:27:02,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795801146] [2021-03-10 23:27:02,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:27:02,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:02,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:27:02,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:27:02,506 INFO L87 Difference]: Start difference. First operand 372 states and 1625 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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) [2021-03-10 23:27:02,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:02,654 INFO L93 Difference]: Finished difference Result 979 states and 4133 transitions. [2021-03-10 23:27:02,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 23:27:02,654 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 23:27:02,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:02,660 INFO L225 Difference]: With dead ends: 979 [2021-03-10 23:27:02,660 INFO L226 Difference]: Without dead ends: 963 [2021-03-10 23:27:02,660 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 187.4ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:27:02,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-03-10 23:27:02,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 612. [2021-03-10 23:27:02,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 4.718494271685761) internal successors, (2883), 611 states have internal predecessors, (2883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:02,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 2883 transitions. [2021-03-10 23:27:02,680 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 2883 transitions. Word has length 21 [2021-03-10 23:27:02,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:02,680 INFO L480 AbstractCegarLoop]: Abstraction has 612 states and 2883 transitions. [2021-03-10 23:27:02,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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) [2021-03-10 23:27:02,680 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 2883 transitions. [2021-03-10 23:27:02,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 23:27:02,684 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:02,684 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:02,894 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-03-10 23:27:02,894 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:02,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:02,894 INFO L82 PathProgramCache]: Analyzing trace with hash -818897626, now seen corresponding path program 6 times [2021-03-10 23:27:02,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:02,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569285158] [2021-03-10 23:27:02,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:02,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:03,021 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:03,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569285158] [2021-03-10 23:27:03,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277748970] [2021-03-10 23:27:03,022 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:03,054 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:27:03,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:03,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 23:27:03,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:03,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-03-10 23:27:03,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:27:03,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:03,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:27:03,176 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:22 [2021-03-10 23:27:03,203 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:03,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:03,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-03-10 23:27:03,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213620842] [2021-03-10 23:27:03,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 23:27:03,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:03,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 23:27:03,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-03-10 23:27:03,206 INFO L87 Difference]: Start difference. First operand 612 states and 2883 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:03,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:03,330 INFO L93 Difference]: Finished difference Result 752 states and 3292 transitions. [2021-03-10 23:27:03,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 23:27:03,331 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 23:27:03,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:03,335 INFO L225 Difference]: With dead ends: 752 [2021-03-10 23:27:03,335 INFO L226 Difference]: Without dead ends: 747 [2021-03-10 23:27:03,335 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 219.2ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:27:03,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2021-03-10 23:27:03,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 612. [2021-03-10 23:27:03,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 4.723404255319149) internal successors, (2886), 611 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:03,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 2886 transitions. [2021-03-10 23:27:03,354 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 2886 transitions. Word has length 21 [2021-03-10 23:27:03,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:03,354 INFO L480 AbstractCegarLoop]: Abstraction has 612 states and 2886 transitions. [2021-03-10 23:27:03,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:03,354 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 2886 transitions. [2021-03-10 23:27:03,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 23:27:03,357 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:03,357 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:03,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-03-10 23:27:03,561 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:03,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:03,561 INFO L82 PathProgramCache]: Analyzing trace with hash -278148342, now seen corresponding path program 7 times [2021-03-10 23:27:03,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:03,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120505811] [2021-03-10 23:27:03,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:03,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:03,648 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:03,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120505811] [2021-03-10 23:27:03,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545184746] [2021-03-10 23:27:03,649 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 23:27:03,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:03,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:03,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:03,841 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:03,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:03,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 23:27:03,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315698574] [2021-03-10 23:27:03,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:27:03,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:03,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:27:03,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:27:03,842 INFO L87 Difference]: Start difference. First operand 612 states and 2886 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:03,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:03,936 INFO L93 Difference]: Finished difference Result 691 states and 3130 transitions. [2021-03-10 23:27:03,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 23:27:03,937 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 23:27:03,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:03,940 INFO L225 Difference]: With dead ends: 691 [2021-03-10 23:27:03,940 INFO L226 Difference]: Without dead ends: 686 [2021-03-10 23:27:03,941 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 202.0ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:27:03,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-03-10 23:27:03,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 618. [2021-03-10 23:27:03,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 617 states have (on average 4.72771474878444) internal successors, (2917), 617 states have internal predecessors, (2917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:03,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 2917 transitions. [2021-03-10 23:27:03,957 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 2917 transitions. Word has length 21 [2021-03-10 23:27:03,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:03,958 INFO L480 AbstractCegarLoop]: Abstraction has 618 states and 2917 transitions. [2021-03-10 23:27:03,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:03,958 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 2917 transitions. [2021-03-10 23:27:03,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 23:27:03,959 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:03,959 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:04,165 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-03-10 23:27:04,165 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:04,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:04,166 INFO L82 PathProgramCache]: Analyzing trace with hash -781165444, now seen corresponding path program 1 times [2021-03-10 23:27:04,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:04,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997945486] [2021-03-10 23:27:04,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:04,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:04,222 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:27:04,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997945486] [2021-03-10 23:27:04,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071309964] [2021-03-10 23:27:04,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:04,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:04,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 23:27:04,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:04,527 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:27:04,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:04,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-03-10 23:27:04,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323918988] [2021-03-10 23:27:04,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 23:27:04,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:04,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 23:27:04,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:27:04,528 INFO L87 Difference]: Start difference. First operand 618 states and 2917 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:04,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:04,582 INFO L93 Difference]: Finished difference Result 608 states and 2803 transitions. [2021-03-10 23:27:04,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 23:27:04,583 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 23:27:04,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:04,586 INFO L225 Difference]: With dead ends: 608 [2021-03-10 23:27:04,586 INFO L226 Difference]: Without dead ends: 584 [2021-03-10 23:27:04,586 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 180.0ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 23:27:04,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-03-10 23:27:04,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 582. [2021-03-10 23:27:04,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 4.729776247848537) internal successors, (2748), 581 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:04,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 2748 transitions. [2021-03-10 23:27:04,603 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 2748 transitions. Word has length 21 [2021-03-10 23:27:04,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:04,604 INFO L480 AbstractCegarLoop]: Abstraction has 582 states and 2748 transitions. [2021-03-10 23:27:04,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:04,604 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 2748 transitions. [2021-03-10 23:27:04,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 23:27:04,606 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:04,606 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:04,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-03-10 23:27:04,820 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:04,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:04,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1522007757, now seen corresponding path program 4 times [2021-03-10 23:27:04,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:04,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274823269] [2021-03-10 23:27:04,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:04,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:04,910 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:04,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274823269] [2021-03-10 23:27:04,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737364286] [2021-03-10 23:27:04,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:04,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:27:04,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:04,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 23:27:04,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:05,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-03-10 23:27:05,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:27:05,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-03-10 23:27:05,035 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:27:05,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:05,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 23:27:05,058 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:75, output treesize:61 [2021-03-10 23:27:05,220 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:05,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:05,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-03-10 23:27:05,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399012213] [2021-03-10 23:27:05,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:27:05,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:05,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:27:05,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:27:05,221 INFO L87 Difference]: Start difference. First operand 582 states and 2748 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:05,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:05,490 INFO L93 Difference]: Finished difference Result 1630 states and 7471 transitions. [2021-03-10 23:27:05,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 23:27:05,491 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 23:27:05,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:05,499 INFO L225 Difference]: With dead ends: 1630 [2021-03-10 23:27:05,499 INFO L226 Difference]: Without dead ends: 1588 [2021-03-10 23:27:05,500 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 365.9ms TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:27:05,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2021-03-10 23:27:05,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 1108. [2021-03-10 23:27:05,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 1107 states have (on average 5.061427280939476) internal successors, (5603), 1107 states have internal predecessors, (5603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:05,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 5603 transitions. [2021-03-10 23:27:05,534 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 5603 transitions. Word has length 22 [2021-03-10 23:27:05,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:05,534 INFO L480 AbstractCegarLoop]: Abstraction has 1108 states and 5603 transitions. [2021-03-10 23:27:05,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:05,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 5603 transitions. [2021-03-10 23:27:05,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 23:27:05,537 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:05,537 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:05,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-03-10 23:27:05,748 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:05,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:05,749 INFO L82 PathProgramCache]: Analyzing trace with hash -488176887, now seen corresponding path program 5 times [2021-03-10 23:27:05,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:05,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141006881] [2021-03-10 23:27:05,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:05,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:05,861 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:05,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141006881] [2021-03-10 23:27:05,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730105418] [2021-03-10 23:27:05,863 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:05,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 23:27:05,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:05,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 23:27:05,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:06,089 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:06,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:06,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 23:27:06,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604227519] [2021-03-10 23:27:06,089 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:27:06,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:06,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:27:06,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:27:06,090 INFO L87 Difference]: Start difference. First operand 1108 states and 5603 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:06,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:06,187 INFO L93 Difference]: Finished difference Result 1227 states and 5978 transitions. [2021-03-10 23:27:06,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 23:27:06,187 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 23:27:06,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:06,193 INFO L225 Difference]: With dead ends: 1227 [2021-03-10 23:27:06,193 INFO L226 Difference]: Without dead ends: 1222 [2021-03-10 23:27:06,193 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 228.3ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:27:06,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2021-03-10 23:27:06,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 1133. [2021-03-10 23:27:06,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 1132 states have (on average 5.0521201413427566) internal successors, (5719), 1132 states have internal predecessors, (5719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:06,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 5719 transitions. [2021-03-10 23:27:06,217 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 5719 transitions. Word has length 22 [2021-03-10 23:27:06,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:06,217 INFO L480 AbstractCegarLoop]: Abstraction has 1133 states and 5719 transitions. [2021-03-10 23:27:06,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:06,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 5719 transitions. [2021-03-10 23:27:06,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 23:27:06,220 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:06,220 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:06,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:06,435 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:06,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:06,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1712214825, now seen corresponding path program 8 times [2021-03-10 23:27:06,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:06,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691202200] [2021-03-10 23:27:06,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:06,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:06,555 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:06,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691202200] [2021-03-10 23:27:06,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360026102] [2021-03-10 23:27:06,556 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 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 [2021-03-10 23:27:06,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:27:06,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:06,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 23:27:06,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:06,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-03-10 23:27:06,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:27:06,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-03-10 23:27:06,701 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:27:06,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:06,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 23:27:06,726 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:89, output treesize:75 [2021-03-10 23:27:06,887 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:06,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:06,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 23:27:06,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069089923] [2021-03-10 23:27:06,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 23:27:06,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:06,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 23:27:06,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:27:06,888 INFO L87 Difference]: Start difference. First operand 1133 states and 5719 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:07,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:07,176 INFO L93 Difference]: Finished difference Result 2178 states and 10194 transitions. [2021-03-10 23:27:07,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 23:27:07,176 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 23:27:07,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:07,198 INFO L225 Difference]: With dead ends: 2178 [2021-03-10 23:27:07,198 INFO L226 Difference]: Without dead ends: 2134 [2021-03-10 23:27:07,198 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 473.1ms TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:27:07,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2134 states. [2021-03-10 23:27:07,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2134 to 1129. [2021-03-10 23:27:07,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1129 states, 1128 states have (on average 5.01595744680851) internal successors, (5658), 1128 states have internal predecessors, (5658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:07,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1129 states to 1129 states and 5658 transitions. [2021-03-10 23:27:07,237 INFO L78 Accepts]: Start accepts. Automaton has 1129 states and 5658 transitions. Word has length 22 [2021-03-10 23:27:07,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:07,237 INFO L480 AbstractCegarLoop]: Abstraction has 1129 states and 5658 transitions. [2021-03-10 23:27:07,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:07,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1129 states and 5658 transitions. [2021-03-10 23:27:07,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 23:27:07,240 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:07,240 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:07,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-03-10 23:27:07,455 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:07,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:07,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1851398567, now seen corresponding path program 9 times [2021-03-10 23:27:07,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:07,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535862165] [2021-03-10 23:27:07,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:07,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:07,532 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:07,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535862165] [2021-03-10 23:27:07,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126741188] [2021-03-10 23:27:07,532 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 [2021-03-10 23:27:07,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:27:07,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:07,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 23:27:07,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:07,716 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:27:07,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:07,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2021-03-10 23:27:07,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197144382] [2021-03-10 23:27:07,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 23:27:07,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:07,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 23:27:07,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:27:07,718 INFO L87 Difference]: Start difference. First operand 1129 states and 5658 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:07,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:07,832 INFO L93 Difference]: Finished difference Result 1249 states and 6050 transitions. [2021-03-10 23:27:07,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 23:27:07,833 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 23:27:07,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:07,836 INFO L225 Difference]: With dead ends: 1249 [2021-03-10 23:27:07,837 INFO L226 Difference]: Without dead ends: 1233 [2021-03-10 23:27:07,837 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 199.2ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-03-10 23:27:07,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-03-10 23:27:07,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 1137. [2021-03-10 23:27:07,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 5.007922535211268) internal successors, (5689), 1136 states have internal predecessors, (5689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:07,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 5689 transitions. [2021-03-10 23:27:07,859 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 5689 transitions. Word has length 22 [2021-03-10 23:27:07,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:07,860 INFO L480 AbstractCegarLoop]: Abstraction has 1137 states and 5689 transitions. [2021-03-10 23:27:07,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:07,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 5689 transitions. [2021-03-10 23:27:07,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 23:27:07,862 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:07,863 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:08,078 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:08,079 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:08,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:08,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1902819445, now seen corresponding path program 10 times [2021-03-10 23:27:08,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:08,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888106173] [2021-03-10 23:27:08,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:08,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:08,178 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:08,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888106173] [2021-03-10 23:27:08,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641601534] [2021-03-10 23:27:08,178 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 [2021-03-10 23:27:08,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:27:08,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:08,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 23:27:08,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:08,395 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:08,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:08,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 23:27:08,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241156043] [2021-03-10 23:27:08,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:27:08,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:08,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:27:08,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:27:08,397 INFO L87 Difference]: Start difference. First operand 1137 states and 5689 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:08,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:08,623 INFO L93 Difference]: Finished difference Result 1205 states and 5916 transitions. [2021-03-10 23:27:08,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 23:27:08,623 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 23:27:08,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:08,626 INFO L225 Difference]: With dead ends: 1205 [2021-03-10 23:27:08,626 INFO L226 Difference]: Without dead ends: 1200 [2021-03-10 23:27:08,626 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 306.9ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:27:08,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-03-10 23:27:08,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 1142. [2021-03-10 23:27:08,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 5.010517090271692) internal successors, (5717), 1141 states have internal predecessors, (5717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:08,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 5717 transitions. [2021-03-10 23:27:08,646 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 5717 transitions. Word has length 22 [2021-03-10 23:27:08,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:08,646 INFO L480 AbstractCegarLoop]: Abstraction has 1142 states and 5717 transitions. [2021-03-10 23:27:08,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:08,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 5717 transitions. [2021-03-10 23:27:08,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 23:27:08,649 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:08,649 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:08,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-03-10 23:27:08,864 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:08,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:08,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1681233933, now seen corresponding path program 11 times [2021-03-10 23:27:08,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:08,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94542886] [2021-03-10 23:27:08,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:08,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:09,016 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:09,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94542886] [2021-03-10 23:27:09,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032905664] [2021-03-10 23:27:09,016 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 [2021-03-10 23:27:09,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:27:09,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:09,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 23:27:09,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:09,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-03-10 23:27:09,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:27:09,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:09,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:27:09,209 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-03-10 23:27:09,262 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:09,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:09,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 23:27:09,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649624511] [2021-03-10 23:27:09,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 23:27:09,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:09,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 23:27:09,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:27:09,263 INFO L87 Difference]: Start difference. First operand 1142 states and 5717 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:09,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:09,438 INFO L93 Difference]: Finished difference Result 1743 states and 8198 transitions. [2021-03-10 23:27:09,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 23:27:09,438 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 23:27:09,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:09,443 INFO L225 Difference]: With dead ends: 1743 [2021-03-10 23:27:09,443 INFO L226 Difference]: Without dead ends: 1729 [2021-03-10 23:27:09,443 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 344.3ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:27:09,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2021-03-10 23:27:09,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1199. [2021-03-10 23:27:09,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 1198 states have (on average 5.064273789649416) internal successors, (6067), 1198 states have internal predecessors, (6067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:09,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 6067 transitions. [2021-03-10 23:27:09,469 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 6067 transitions. Word has length 22 [2021-03-10 23:27:09,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:09,469 INFO L480 AbstractCegarLoop]: Abstraction has 1199 states and 6067 transitions. [2021-03-10 23:27:09,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:09,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 6067 transitions. [2021-03-10 23:27:09,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 23:27:09,472 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:09,472 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:09,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-03-10 23:27:09,692 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:09,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:09,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1253616623, now seen corresponding path program 12 times [2021-03-10 23:27:09,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:09,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883865117] [2021-03-10 23:27:09,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:09,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:09,788 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:09,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883865117] [2021-03-10 23:27:09,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741176108] [2021-03-10 23:27:09,788 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:09,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:27:09,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:09,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 23:27:09,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:09,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-03-10 23:27:09,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:27:09,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-03-10 23:27:09,973 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:27:09,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:09,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:27:09,998 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:91, output treesize:77 [2021-03-10 23:27:10,080 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:27:10,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:10,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2021-03-10 23:27:10,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384982113] [2021-03-10 23:27:10,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 23:27:10,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:10,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 23:27:10,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:27:10,081 INFO L87 Difference]: Start difference. First operand 1199 states and 6067 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:10,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:10,466 INFO L93 Difference]: Finished difference Result 1573 states and 7555 transitions. [2021-03-10 23:27:10,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 23:27:10,466 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 23:27:10,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:10,471 INFO L225 Difference]: With dead ends: 1573 [2021-03-10 23:27:10,471 INFO L226 Difference]: Without dead ends: 1553 [2021-03-10 23:27:10,471 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 470.7ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:27:10,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1553 states. [2021-03-10 23:27:10,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1553 to 1261. [2021-03-10 23:27:10,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1260 states have (on average 5.0738095238095235) internal successors, (6393), 1260 states have internal predecessors, (6393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:10,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 6393 transitions. [2021-03-10 23:27:10,499 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 6393 transitions. Word has length 22 [2021-03-10 23:27:10,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:10,499 INFO L480 AbstractCegarLoop]: Abstraction has 1261 states and 6393 transitions. [2021-03-10 23:27:10,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:10,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 6393 transitions. [2021-03-10 23:27:10,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 23:27:10,502 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:10,502 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:10,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-03-10 23:27:10,715 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:10,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:10,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1547176399, now seen corresponding path program 13 times [2021-03-10 23:27:10,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:10,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468893435] [2021-03-10 23:27:10,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:10,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:10,828 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:10,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468893435] [2021-03-10 23:27:10,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645427142] [2021-03-10 23:27:10,829 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 [2021-03-10 23:27:10,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:10,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 23:27:10,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:11,035 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:11,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:11,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 23:27:11,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396048729] [2021-03-10 23:27:11,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:27:11,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:11,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:27:11,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:27:11,037 INFO L87 Difference]: Start difference. First operand 1261 states and 6393 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:11,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:11,192 INFO L93 Difference]: Finished difference Result 1457 states and 6995 transitions. [2021-03-10 23:27:11,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 23:27:11,192 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 23:27:11,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:11,197 INFO L225 Difference]: With dead ends: 1457 [2021-03-10 23:27:11,197 INFO L226 Difference]: Without dead ends: 1450 [2021-03-10 23:27:11,197 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 239.9ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:27:11,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1450 states. [2021-03-10 23:27:11,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1450 to 1238. [2021-03-10 23:27:11,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 5.019401778496362) internal successors, (6209), 1237 states have internal predecessors, (6209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:11,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 6209 transitions. [2021-03-10 23:27:11,224 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 6209 transitions. Word has length 22 [2021-03-10 23:27:11,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:11,224 INFO L480 AbstractCegarLoop]: Abstraction has 1238 states and 6209 transitions. [2021-03-10 23:27:11,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:11,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 6209 transitions. [2021-03-10 23:27:11,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 23:27:11,227 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:11,255 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:11,470 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:11,471 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:11,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:11,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1264592553, now seen corresponding path program 14 times [2021-03-10 23:27:11,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:11,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095001705] [2021-03-10 23:27:11,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:11,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:11,549 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:11,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095001705] [2021-03-10 23:27:11,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605105506] [2021-03-10 23:27:11,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:11,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:27:11,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:11,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 23:27:11,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:11,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-03-10 23:27:11,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:27:11,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:11,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:27:11,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:34 [2021-03-10 23:27:11,797 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:11,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:11,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-03-10 23:27:11,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272516907] [2021-03-10 23:27:11,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:27:11,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:11,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:27:11,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:27:11,798 INFO L87 Difference]: Start difference. First operand 1238 states and 6209 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:11,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:11,990 INFO L93 Difference]: Finished difference Result 1354 states and 6446 transitions. [2021-03-10 23:27:11,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 23:27:11,990 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 23:27:11,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:11,995 INFO L225 Difference]: With dead ends: 1354 [2021-03-10 23:27:11,995 INFO L226 Difference]: Without dead ends: 1342 [2021-03-10 23:27:11,995 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 320.8ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:27:11,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2021-03-10 23:27:12,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1179. [2021-03-10 23:27:12,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 1178 states have (on average 4.953310696095077) internal successors, (5835), 1178 states have internal predecessors, (5835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:12,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 5835 transitions. [2021-03-10 23:27:12,022 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 5835 transitions. Word has length 22 [2021-03-10 23:27:12,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:12,022 INFO L480 AbstractCegarLoop]: Abstraction has 1179 states and 5835 transitions. [2021-03-10 23:27:12,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:12,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 5835 transitions. [2021-03-10 23:27:12,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 23:27:12,025 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:12,025 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:12,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-03-10 23:27:12,239 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:12,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:12,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1104277259, now seen corresponding path program 15 times [2021-03-10 23:27:12,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:12,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417942377] [2021-03-10 23:27:12,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:12,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:12,338 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:12,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417942377] [2021-03-10 23:27:12,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604316045] [2021-03-10 23:27:12,339 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 [2021-03-10 23:27:12,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 23:27:12,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:12,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 23:27:12,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:12,532 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:12,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:12,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 23:27:12,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297358222] [2021-03-10 23:27:12,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:27:12,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:12,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:27:12,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:27:12,533 INFO L87 Difference]: Start difference. First operand 1179 states and 5835 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:12,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:12,655 INFO L93 Difference]: Finished difference Result 1232 states and 6006 transitions. [2021-03-10 23:27:12,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 23:27:12,656 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 23:27:12,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:12,659 INFO L225 Difference]: With dead ends: 1232 [2021-03-10 23:27:12,659 INFO L226 Difference]: Without dead ends: 1227 [2021-03-10 23:27:12,659 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 224.5ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:27:12,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2021-03-10 23:27:12,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1184. [2021-03-10 23:27:12,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 4.945900253592561) internal successors, (5851), 1183 states have internal predecessors, (5851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:12,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 5851 transitions. [2021-03-10 23:27:12,680 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 5851 transitions. Word has length 22 [2021-03-10 23:27:12,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:12,680 INFO L480 AbstractCegarLoop]: Abstraction has 1184 states and 5851 transitions. [2021-03-10 23:27:12,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:12,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 5851 transitions. [2021-03-10 23:27:12,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 23:27:12,683 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:12,683 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:12,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:12,895 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:12,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:12,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1885658193, now seen corresponding path program 2 times [2021-03-10 23:27:12,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:12,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802879243] [2021-03-10 23:27:12,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:12,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:13,016 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:13,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802879243] [2021-03-10 23:27:13,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565528374] [2021-03-10 23:27:13,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:13,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:27:13,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:13,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 23:27:13,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:13,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-03-10 23:27:13,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:27:13,430 INFO L628 ElimStorePlain]: treesize reduction 7, result has 90.1 percent of original size [2021-03-10 23:27:13,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-03-10 23:27:13,434 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:27:13,452 INFO L628 ElimStorePlain]: treesize reduction 33, result has 42.1 percent of original size [2021-03-10 23:27:13,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:27:13,453 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:78, output treesize:24 [2021-03-10 23:27:13,485 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:13,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:13,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 23:27:13,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192921519] [2021-03-10 23:27:13,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:27:13,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:13,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:27:13,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:27:13,487 INFO L87 Difference]: Start difference. First operand 1184 states and 5851 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:13,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:13,789 INFO L93 Difference]: Finished difference Result 1635 states and 7595 transitions. [2021-03-10 23:27:13,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 23:27:13,789 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 23:27:13,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:13,793 INFO L225 Difference]: With dead ends: 1635 [2021-03-10 23:27:13,793 INFO L226 Difference]: Without dead ends: 1616 [2021-03-10 23:27:13,793 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 503.8ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:27:13,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2021-03-10 23:27:13,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1233. [2021-03-10 23:27:13,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1232 states have (on average 4.982954545454546) internal successors, (6139), 1232 states have internal predecessors, (6139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:13,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 6139 transitions. [2021-03-10 23:27:13,815 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 6139 transitions. Word has length 22 [2021-03-10 23:27:13,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:13,815 INFO L480 AbstractCegarLoop]: Abstraction has 1233 states and 6139 transitions. [2021-03-10 23:27:13,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:13,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 6139 transitions. [2021-03-10 23:27:13,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 23:27:13,818 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:13,818 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:14,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-03-10 23:27:14,026 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:14,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:14,026 INFO L82 PathProgramCache]: Analyzing trace with hash -671870473, now seen corresponding path program 3 times [2021-03-10 23:27:14,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:14,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952942620] [2021-03-10 23:27:14,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:14,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:14,082 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:27:14,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952942620] [2021-03-10 23:27:14,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575643662] [2021-03-10 23:27:14,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 23:27:14,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:14,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:14,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 23:27:14,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:14,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-03-10 23:27:14,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:27:14,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:14,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:27:14,222 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:10 [2021-03-10 23:27:14,245 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:27:14,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:14,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 23:27:14,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205659815] [2021-03-10 23:27:14,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:27:14,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:14,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:27:14,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:27:14,246 INFO L87 Difference]: Start difference. First operand 1233 states and 6139 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:14,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:14,425 INFO L93 Difference]: Finished difference Result 1856 states and 8646 transitions. [2021-03-10 23:27:14,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 23:27:14,425 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 23:27:14,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:14,429 INFO L225 Difference]: With dead ends: 1856 [2021-03-10 23:27:14,429 INFO L226 Difference]: Without dead ends: 1832 [2021-03-10 23:27:14,430 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 155.1ms TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:27:14,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2021-03-10 23:27:14,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1293. [2021-03-10 23:27:14,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1293 states, 1292 states have (on average 5.05030959752322) internal successors, (6525), 1292 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:14,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 6525 transitions. [2021-03-10 23:27:14,471 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 6525 transitions. Word has length 22 [2021-03-10 23:27:14,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:14,471 INFO L480 AbstractCegarLoop]: Abstraction has 1293 states and 6525 transitions. [2021-03-10 23:27:14,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:14,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 6525 transitions. [2021-03-10 23:27:14,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 23:27:14,474 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:14,474 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:14,674 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-03-10 23:27:14,674 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:14,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:14,675 INFO L82 PathProgramCache]: Analyzing trace with hash 965997621, now seen corresponding path program 4 times [2021-03-10 23:27:14,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:14,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18514362] [2021-03-10 23:27:14,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:14,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:14,755 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:14,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18514362] [2021-03-10 23:27:14,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670778573] [2021-03-10 23:27:14,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:14,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:27:14,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:14,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 23:27:14,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:15,102 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:15,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:15,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 23:27:15,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241855707] [2021-03-10 23:27:15,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 23:27:15,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:15,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 23:27:15,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:27:15,103 INFO L87 Difference]: Start difference. First operand 1293 states and 6525 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:15,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:15,189 INFO L93 Difference]: Finished difference Result 1304 states and 6549 transitions. [2021-03-10 23:27:15,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 23:27:15,189 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 23:27:15,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:15,192 INFO L225 Difference]: With dead ends: 1304 [2021-03-10 23:27:15,192 INFO L226 Difference]: Without dead ends: 1302 [2021-03-10 23:27:15,192 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 323.4ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-03-10 23:27:15,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2021-03-10 23:27:15,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1298. [2021-03-10 23:27:15,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1297 states have (on average 5.036237471087124) internal successors, (6532), 1297 states have internal predecessors, (6532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:15,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 6532 transitions. [2021-03-10 23:27:15,213 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 6532 transitions. Word has length 22 [2021-03-10 23:27:15,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:15,213 INFO L480 AbstractCegarLoop]: Abstraction has 1298 states and 6532 transitions. [2021-03-10 23:27:15,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:15,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 6532 transitions. [2021-03-10 23:27:15,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 23:27:15,216 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:15,216 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:15,431 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-03-10 23:27:15,431 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:15,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:15,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1818617425, now seen corresponding path program 5 times [2021-03-10 23:27:15,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:15,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413673537] [2021-03-10 23:27:15,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:15,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:15,578 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:15,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413673537] [2021-03-10 23:27:15,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239638500] [2021-03-10 23:27:15,579 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:15,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:27:15,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:15,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 23:27:15,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:16,348 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-03-10 23:27:16,373 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:16,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:16,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-03-10 23:27:16,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986449703] [2021-03-10 23:27:16,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:27:16,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:16,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:27:16,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:27:16,374 INFO L87 Difference]: Start difference. First operand 1298 states and 6532 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:16,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:16,733 INFO L93 Difference]: Finished difference Result 1307 states and 6549 transitions. [2021-03-10 23:27:16,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 23:27:16,733 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 23:27:16,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:16,737 INFO L225 Difference]: With dead ends: 1307 [2021-03-10 23:27:16,737 INFO L226 Difference]: Without dead ends: 1305 [2021-03-10 23:27:16,737 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1065.1ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:27:16,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1305 states. [2021-03-10 23:27:16,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1305 to 1296. [2021-03-10 23:27:16,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 1295 states have (on average 5.0355212355212355) internal successors, (6521), 1295 states have internal predecessors, (6521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:16,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 6521 transitions. [2021-03-10 23:27:16,760 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 6521 transitions. Word has length 22 [2021-03-10 23:27:16,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:16,760 INFO L480 AbstractCegarLoop]: Abstraction has 1296 states and 6521 transitions. [2021-03-10 23:27:16,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:16,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 6521 transitions. [2021-03-10 23:27:16,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 23:27:16,763 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:16,763 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:16,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-03-10 23:27:16,979 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:16,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:16,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1448901451, now seen corresponding path program 6 times [2021-03-10 23:27:16,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:16,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896508039] [2021-03-10 23:27:16,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:16,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:17,111 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:17,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896508039] [2021-03-10 23:27:17,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760302609] [2021-03-10 23:27:17,111 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:17,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:27:17,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:17,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 23:27:17,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:17,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-03-10 23:27:17,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:27:17,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:17,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:27:17,338 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:24 [2021-03-10 23:27:17,366 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:17,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:17,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 23:27:17,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573500259] [2021-03-10 23:27:17,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:27:17,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:17,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:27:17,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:27:17,367 INFO L87 Difference]: Start difference. First operand 1296 states and 6521 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:17,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:17,644 INFO L93 Difference]: Finished difference Result 1343 states and 6669 transitions. [2021-03-10 23:27:17,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 23:27:17,645 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 23:27:17,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:17,648 INFO L225 Difference]: With dead ends: 1343 [2021-03-10 23:27:17,648 INFO L226 Difference]: Without dead ends: 1334 [2021-03-10 23:27:17,648 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 431.4ms TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:27:17,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2021-03-10 23:27:17,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 1297. [2021-03-10 23:27:17,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 5.042438271604938) internal successors, (6535), 1296 states have internal predecessors, (6535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:17,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 6535 transitions. [2021-03-10 23:27:17,671 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 6535 transitions. Word has length 22 [2021-03-10 23:27:17,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:17,671 INFO L480 AbstractCegarLoop]: Abstraction has 1297 states and 6535 transitions. [2021-03-10 23:27:17,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:17,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 6535 transitions. [2021-03-10 23:27:17,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 23:27:17,674 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:17,674 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:17,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:17,875 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:17,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:17,875 INFO L82 PathProgramCache]: Analyzing trace with hash 541686385, now seen corresponding path program 7 times [2021-03-10 23:27:17,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:17,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609114986] [2021-03-10 23:27:17,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:17,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:17,950 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:17,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609114986] [2021-03-10 23:27:17,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059581593] [2021-03-10 23:27:17,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 23:27:17,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:17,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 23:27:17,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:18,353 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:18,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:18,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 23:27:18,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142343197] [2021-03-10 23:27:18,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 23:27:18,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:18,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 23:27:18,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:27:18,355 INFO L87 Difference]: Start difference. First operand 1297 states and 6535 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:18,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:18,574 INFO L93 Difference]: Finished difference Result 1313 states and 6570 transitions. [2021-03-10 23:27:18,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 23:27:18,574 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 23:27:18,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:18,577 INFO L225 Difference]: With dead ends: 1313 [2021-03-10 23:27:18,577 INFO L226 Difference]: Without dead ends: 1312 [2021-03-10 23:27:18,577 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 475.8ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:27:18,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2021-03-10 23:27:18,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 1299. [2021-03-10 23:27:18,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 5.037750385208012) internal successors, (6539), 1298 states have internal predecessors, (6539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:18,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 6539 transitions. [2021-03-10 23:27:18,597 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 6539 transitions. Word has length 22 [2021-03-10 23:27:18,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:18,598 INFO L480 AbstractCegarLoop]: Abstraction has 1299 states and 6539 transitions. [2021-03-10 23:27:18,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:18,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 6539 transitions. [2021-03-10 23:27:18,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 23:27:18,600 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:18,600 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:18,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-03-10 23:27:18,810 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:18,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:18,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1751157336, now seen corresponding path program 6 times [2021-03-10 23:27:18,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:18,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309652938] [2021-03-10 23:27:18,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:18,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:18,881 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:18,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309652938] [2021-03-10 23:27:18,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396318980] [2021-03-10 23:27:18,881 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 23:27:18,916 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 23:27:18,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:18,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 23:27:18,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:19,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-03-10 23:27:19,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:27:19,130 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 23:27:19,130 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:27:19,154 INFO L628 ElimStorePlain]: treesize reduction 7, result has 85.7 percent of original size [2021-03-10 23:27:19,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:27:19,155 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:115, output treesize:42 [2021-03-10 23:27:19,212 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:19,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:19,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-03-10 23:27:19,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789904311] [2021-03-10 23:27:19,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:27:19,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:19,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:27:19,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:27:19,213 INFO L87 Difference]: Start difference. First operand 1299 states and 6539 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:19,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:19,404 INFO L93 Difference]: Finished difference Result 2334 states and 10656 transitions. [2021-03-10 23:27:19,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 23:27:19,404 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 23:27:19,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:19,409 INFO L225 Difference]: With dead ends: 2334 [2021-03-10 23:27:19,409 INFO L226 Difference]: Without dead ends: 2313 [2021-03-10 23:27:19,410 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 314.6ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:27:19,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2021-03-10 23:27:19,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 1344. [2021-03-10 23:27:19,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1343 states have (on average 5.061801935964259) internal successors, (6798), 1343 states have internal predecessors, (6798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:19,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 6798 transitions. [2021-03-10 23:27:19,439 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 6798 transitions. Word has length 23 [2021-03-10 23:27:19,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:19,439 INFO L480 AbstractCegarLoop]: Abstraction has 1344 states and 6798 transitions. [2021-03-10 23:27:19,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:19,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 6798 transitions. [2021-03-10 23:27:19,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 23:27:19,442 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:19,442 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:19,646 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-03-10 23:27:19,647 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:19,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:19,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1519096036, now seen corresponding path program 7 times [2021-03-10 23:27:19,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:19,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367504740] [2021-03-10 23:27:19,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:19,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:19,744 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:19,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367504740] [2021-03-10 23:27:19,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820030325] [2021-03-10 23:27:19,744 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:19,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:19,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 23:27:19,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:20,100 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:20,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:20,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-03-10 23:27:20,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281373164] [2021-03-10 23:27:20,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 23:27:20,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:20,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 23:27:20,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 23:27:20,101 INFO L87 Difference]: Start difference. First operand 1344 states and 6798 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:20,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:20,262 INFO L93 Difference]: Finished difference Result 1283 states and 6260 transitions. [2021-03-10 23:27:20,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 23:27:20,262 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 23:27:20,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:20,265 INFO L225 Difference]: With dead ends: 1283 [2021-03-10 23:27:20,265 INFO L226 Difference]: Without dead ends: 1274 [2021-03-10 23:27:20,265 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 364.7ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:27:20,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-03-10 23:27:20,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 1250. [2021-03-10 23:27:20,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 4.948759007205765) internal successors, (6181), 1249 states have internal predecessors, (6181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:20,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 6181 transitions. [2021-03-10 23:27:20,282 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 6181 transitions. Word has length 23 [2021-03-10 23:27:20,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:20,282 INFO L480 AbstractCegarLoop]: Abstraction has 1250 states and 6181 transitions. [2021-03-10 23:27:20,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:20,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 6181 transitions. [2021-03-10 23:27:20,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 23:27:20,284 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:20,284 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:20,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:20,485 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:20,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:20,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1855571384, now seen corresponding path program 16 times [2021-03-10 23:27:20,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:20,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103569039] [2021-03-10 23:27:20,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:20,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:20,558 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:20,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103569039] [2021-03-10 23:27:20,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522473791] [2021-03-10 23:27:20,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:20,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:27:20,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:20,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 23:27:20,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:20,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-03-10 23:27:20,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:27:20,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-03-10 23:27:20,771 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:27:20,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:20,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 23:27:20,800 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-03-10 23:27:20,886 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:20,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:20,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 23:27:20,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172261086] [2021-03-10 23:27:20,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 23:27:20,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:20,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 23:27:20,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:27:20,887 INFO L87 Difference]: Start difference. First operand 1250 states and 6181 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) [2021-03-10 23:27:20,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:20,974 INFO L93 Difference]: Finished difference Result 1199 states and 5228 transitions. [2021-03-10 23:27:20,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 23:27:20,974 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 23:27:20,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:20,977 INFO L225 Difference]: With dead ends: 1199 [2021-03-10 23:27:20,977 INFO L226 Difference]: Without dead ends: 1193 [2021-03-10 23:27:20,977 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 245.2ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:27:20,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2021-03-10 23:27:20,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 972. [2021-03-10 23:27:20,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 4.668383110195674) internal successors, (4533), 971 states have internal predecessors, (4533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:20,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 4533 transitions. [2021-03-10 23:27:20,994 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 4533 transitions. Word has length 23 [2021-03-10 23:27:20,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:20,994 INFO L480 AbstractCegarLoop]: Abstraction has 972 states and 4533 transitions. [2021-03-10 23:27:20,994 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) [2021-03-10 23:27:20,994 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 4533 transitions. [2021-03-10 23:27:20,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 23:27:20,996 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:20,996 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:21,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:21,211 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:21,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:21,211 INFO L82 PathProgramCache]: Analyzing trace with hash -2015886678, now seen corresponding path program 17 times [2021-03-10 23:27:21,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:21,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380504451] [2021-03-10 23:27:21,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:21,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:21,304 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:21,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380504451] [2021-03-10 23:27:21,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193906651] [2021-03-10 23:27:21,304 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:21,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 23:27:21,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:21,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 23:27:21,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:21,652 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:21,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:21,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-03-10 23:27:21,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109023226] [2021-03-10 23:27:21,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 23:27:21,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:21,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 23:27:21,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 23:27:21,653 INFO L87 Difference]: Start difference. First operand 972 states and 4533 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:21,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:21,735 INFO L93 Difference]: Finished difference Result 983 states and 4449 transitions. [2021-03-10 23:27:21,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 23:27:21,736 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 23:27:21,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:21,739 INFO L225 Difference]: With dead ends: 983 [2021-03-10 23:27:21,739 INFO L226 Difference]: Without dead ends: 977 [2021-03-10 23:27:21,739 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 308.8ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 23:27:21,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-03-10 23:27:21,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 949. [2021-03-10 23:27:21,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 948 states have (on average 4.60337552742616) internal successors, (4364), 948 states have internal predecessors, (4364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:21,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 4364 transitions. [2021-03-10 23:27:21,754 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 4364 transitions. Word has length 23 [2021-03-10 23:27:21,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:21,756 INFO L480 AbstractCegarLoop]: Abstraction has 949 states and 4364 transitions. [2021-03-10 23:27:21,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:21,756 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 4364 transitions. [2021-03-10 23:27:21,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 23:27:21,758 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:21,758 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:21,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:21,963 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:21,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:21,963 INFO L82 PathProgramCache]: Analyzing trace with hash 2015084676, now seen corresponding path program 18 times [2021-03-10 23:27:21,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:21,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94106307] [2021-03-10 23:27:21,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:21,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:22,026 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:22,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94106307] [2021-03-10 23:27:22,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785906595] [2021-03-10 23:27:22,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 23:27:22,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 23:27:22,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:22,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 23:27:22,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:22,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-03-10 23:27:22,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:27:22,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:22,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:27:22,228 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-03-10 23:27:22,256 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:22,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:22,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-03-10 23:27:22,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321365517] [2021-03-10 23:27:22,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:27:22,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:22,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:27:22,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:27:22,257 INFO L87 Difference]: Start difference. First operand 949 states and 4364 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 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) [2021-03-10 23:27:22,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:22,432 INFO L93 Difference]: Finished difference Result 1411 states and 5930 transitions. [2021-03-10 23:27:22,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 23:27:22,432 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 23:27:22,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:22,435 INFO L225 Difference]: With dead ends: 1411 [2021-03-10 23:27:22,435 INFO L226 Difference]: Without dead ends: 1405 [2021-03-10 23:27:22,436 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 225.5ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:27:22,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2021-03-10 23:27:22,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 947. [2021-03-10 23:27:22,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 4.619450317124736) internal successors, (4370), 946 states have internal predecessors, (4370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:22,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 4370 transitions. [2021-03-10 23:27:22,454 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 4370 transitions. Word has length 23 [2021-03-10 23:27:22,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:22,454 INFO L480 AbstractCegarLoop]: Abstraction has 947 states and 4370 transitions. [2021-03-10 23:27:22,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 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) [2021-03-10 23:27:22,454 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 4370 transitions. [2021-03-10 23:27:22,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 23:27:22,456 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:22,457 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:22,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-03-10 23:27:22,657 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:22,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:22,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1854769382, now seen corresponding path program 19 times [2021-03-10 23:27:22,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:22,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063578870] [2021-03-10 23:27:22,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:22,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:22,793 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:22,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063578870] [2021-03-10 23:27:22,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610795293] [2021-03-10 23:27:22,794 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 [2021-03-10 23:27:22,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:22,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 23:27:22,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:23,155 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:23,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:23,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-03-10 23:27:23,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105067357] [2021-03-10 23:27:23,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 23:27:23,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:23,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 23:27:23,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-03-10 23:27:23,156 INFO L87 Difference]: Start difference. First operand 947 states and 4370 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:23,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:23,196 INFO L93 Difference]: Finished difference Result 16 states and 21 transitions. [2021-03-10 23:27:23,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 23:27:23,196 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 23:27:23,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:23,196 INFO L225 Difference]: With dead ends: 16 [2021-03-10 23:27:23,196 INFO L226 Difference]: Without dead ends: 0 [2021-03-10 23:27:23,197 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 385.1ms TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:27:23,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-03-10 23:27:23,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-03-10 23:27:23,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:23,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-03-10 23:27:23,201 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2021-03-10 23:27:23,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:23,201 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-03-10 23:27:23,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:23,201 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-03-10 23:27:23,202 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-03-10 23:27:23,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:23,405 INFO L202 PluginConnector]: Adding new model commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 11:27:23 BasicIcfg [2021-03-10 23:27:23,405 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 23:27:23,406 INFO L168 Benchmark]: Toolchain (without parser) took 31868.76 ms. Allocated memory was 255.9 MB in the beginning and 775.9 MB in the end (delta: 520.1 MB). Free memory was 236.9 MB in the beginning and 729.4 MB in the end (delta: -492.5 MB). Peak memory consumption was 27.7 MB. Max. memory is 16.0 GB. [2021-03-10 23:27:23,406 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory was 238.2 MB in the beginning and 238.1 MB in the end (delta: 89.0 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 23:27:23,406 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.22 ms. Allocated memory is still 255.9 MB. Free memory was 236.3 MB in the beginning and 234.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 23:27:23,406 INFO L168 Benchmark]: Boogie Preprocessor took 33.45 ms. Allocated memory is still 255.9 MB. Free memory was 234.8 MB in the beginning and 233.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 23:27:23,406 INFO L168 Benchmark]: RCFGBuilder took 545.59 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 209.7 MB in the end (delta: 23.9 MB). Peak memory consumption was 35.1 MB. Max. memory is 16.0 GB. [2021-03-10 23:27:23,406 INFO L168 Benchmark]: TraceAbstraction took 31252.75 ms. Allocated memory was 255.9 MB in the beginning and 775.9 MB in the end (delta: 520.1 MB). Free memory was 209.2 MB in the beginning and 729.4 MB in the end (delta: -520.2 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 23:27:23,406 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 0.11 ms. Allocated memory is still 255.9 MB. Free memory was 238.2 MB in the beginning and 238.1 MB in the end (delta: 89.0 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 27.22 ms. Allocated memory is still 255.9 MB. Free memory was 236.3 MB in the beginning and 234.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 33.45 ms. Allocated memory is still 255.9 MB. Free memory was 234.8 MB in the beginning and 233.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 545.59 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 209.7 MB in the end (delta: 23.9 MB). Peak memory consumption was 35.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 31252.75 ms. Allocated memory was 255.9 MB in the beginning and 775.9 MB in the end (delta: 520.1 MB). Free memory was 209.2 MB in the beginning and 729.4 MB in the end (delta: -520.2 MB). There was no memory consumed. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 172]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 31155.0ms, OverallIterations: 45, TraceHistogramMax: 5, EmptinessCheckTime: 85.3ms, AutomataDifference: 6669.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 16.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1438 SDtfs, 2496 SDslu, 10249 SDs, 0 SdLazy, 4396 SolverSat, 367 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2217.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1253 GetRequests, 642 SyntacticMatches, 8 SemanticMatches, 603 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1514 ImplicationChecksByTransitivity, 11147.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1344occurred in iteration=40, InterpolantAutomatonStates: 403, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 770.0ms AutomataMinimizationTime, 45 MinimizatonAttempts, 7294 StatesRemovedByMinimization, 39 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 329.0ms SsaConstructionTime, 912.9ms SatisfiabilityAnalysisTime, 12439.5ms InterpolantComputationTime, 1793 NumberOfCodeBlocks, 1793 NumberOfCodeBlocksAsserted, 150 NumberOfCheckSat, 1706 ConstructedInterpolants, 58 QuantifiedInterpolants, 20088 SizeOfPredicates, 372 NumberOfNonLiveVariables, 2973 ConjunctsInSsa, 532 ConjunctsInUnsatCore, 87 InterpolantComputations, 4 PerfectInterpolantSequences, 224/890 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 proved your program to be correct! Received shutdown request...