/usr/bin/java -Xmx8000000000 -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 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-12 19:42:06,234 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-12 19:42:06,236 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-12 19:42:06,266 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-12 19:42:06,266 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-12 19:42:06,268 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-12 19:42:06,270 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-12 19:42:06,274 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-12 19:42:06,276 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-12 19:42:06,279 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-12 19:42:06,280 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-12 19:42:06,281 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-12 19:42:06,281 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-12 19:42:06,282 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-12 19:42:06,284 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-12 19:42:06,284 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-12 19:42:06,287 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-12 19:42:06,287 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-12 19:42:06,289 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-12 19:42:06,295 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-12 19:42:06,296 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-12 19:42:06,298 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-12 19:42:06,299 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-12 19:42:06,300 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-12 19:42:06,305 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-12 19:42:06,307 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-12 19:42:06,322 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-12 19:42:06,323 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-12 19:42:06,324 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-12 19:42:06,324 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-12 19:42:06,325 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-12 19:42:06,325 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-12 19:42:06,325 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-12 19:42:06,325 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-12 19:42:06,326 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-12 19:42:06,326 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-12 19:42:06,327 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 [2021-08-12 19:42:06,355 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-12 19:42:06,355 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-12 19:42:06,355 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-12 19:42:06,356 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-12 19:42:06,358 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-12 19:42:06,358 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-12 19:42:06,358 INFO L138 SettingsManager]: * Use SBE=true [2021-08-12 19:42:06,358 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-12 19:42:06,358 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-12 19:42:06,359 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-12 19:42:06,359 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-12 19:42:06,359 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-12 19:42:06,359 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-12 19:42:06,359 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-12 19:42:06,360 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-12 19:42:06,360 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-12 19:42:06,360 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-12 19:42:06,360 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-12 19:42:06,360 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-12 19:42:06,360 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-12 19:42:06,360 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-12 19:42:06,360 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-12 19:42:06,361 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-12 19:42:06,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 19:42:06,361 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-12 19:42:06,361 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-12 19:42:06,361 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-12 19:42:06,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-12 19:42:06,361 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-12 19:42:06,361 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-12 19:42:06,361 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-12 19:42:06,618 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-12 19:42:06,638 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-12 19:42:06,640 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-12 19:42:06,641 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-12 19:42:06,642 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-12 19:42:06,643 INFO L432 ainManager$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 [2021-08-12 19:42:06,643 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-2.wvr.bpl' [2021-08-12 19:42:06,708 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-12 19:42:06,715 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-12 19:42:06,717 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-12 19:42:06,717 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-12 19:42:06,717 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-12 19:42:06,730 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 12.08 07:42:06" (1/1) ... [2021-08-12 19:42:06,742 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 12.08 07:42:06" (1/1) ... [2021-08-12 19:42:06,748 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-12 19:42:06,749 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-12 19:42:06,749 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-12 19:42:06,749 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-12 19:42:06,755 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:42:06" (1/1) ... [2021-08-12 19:42:06,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:42:06" (1/1) ... [2021-08-12 19:42:06,764 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:42:06" (1/1) ... [2021-08-12 19:42:06,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:42:06" (1/1) ... [2021-08-12 19:42:06,772 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:42:06" (1/1) ... [2021-08-12 19:42:06,776 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:42:06" (1/1) ... [2021-08-12 19:42:06,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:42:06" (1/1) ... [2021-08-12 19:42:06,783 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-12 19:42:06,784 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-12 19:42:06,785 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-12 19:42:06,785 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-12 19:42:06,786 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:42:06" (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 [2021-08-12 19:42:06,861 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-12 19:42:06,861 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-12 19:42:06,862 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-12 19:42:06,862 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-12 19:42:06,862 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-12 19:42:06,862 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-12 19:42:06,862 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-12 19:42:06,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-12 19:42:06,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-12 19:42:06,863 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-12 19:42:06,863 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-12 19:42:06,863 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-12 19:42:06,863 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-08-12 19:42:06,863 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-08-12 19:42:06,863 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-08-12 19:42:06,864 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-12 19:42:07,293 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-12 19:42:07,293 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-08-12 19:42:07,294 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-08-12 19:42:07,294 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-08-12 19:42:07,294 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-08-12 19:42:07,294 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread4EXIT is neither atomic block end nor error location. [2021-08-12 19:42:07,295 INFO L202 PluginConnector]: Adding new model commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 07:42:07 BoogieIcfgContainer [2021-08-12 19:42:07,295 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-12 19:42:07,296 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-12 19:42:07,296 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-12 19:42:07,298 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-12 19:42:07,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:42:06" (1/2) ... [2021-08-12 19:42:07,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b8080da and model type commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.08 07:42:07, skipping insertion in model container [2021-08-12 19:42:07,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 07:42:07" (2/2) ... [2021-08-12 19:42:07,302 INFO L111 eAbstractionObserver]: Analyzing ICFG commit-2.wvr.bpl [2021-08-12 19:42:07,306 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-12 19:42:07,307 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-12 19:42:07,307 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-12 19:42:07,347 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-08-12 19:42:07,363 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-08-12 19:42:07,388 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 19:42:07,389 INFO L379 AbstractCegarLoop]: Hoare is true [2021-08-12 19:42:07,389 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 19:42:07,389 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 19:42:07,389 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 19:42:07,389 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 19:42:07,389 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 19:42:07,389 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 19:42:07,396 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 25 transitions, 82 flow [2021-08-12 19:42:07,409 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) [2021-08-12 19:42:07,411 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) [2021-08-12 19:42:07,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-12 19:42:07,417 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:07,418 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:07,418 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:07,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:07,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1687097808, now seen corresponding path program 1 times [2021-08-12 19:42:07,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:07,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760468315] [2021-08-12 19:42:07,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:07,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:07,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:07,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:07,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760468315] [2021-08-12 19:42:07,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760468315] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:42:07,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:42:07,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-12 19:42:07,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335039716] [2021-08-12 19:42:07,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 19:42:07,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:07,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 19:42:07,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:42:07,531 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) [2021-08-12 19:42:07,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:07,566 INFO L93 Difference]: Finished difference Result 98 states and 331 transitions. [2021-08-12 19:42:07,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 19:42:07,567 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 [2021-08-12 19:42:07,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:07,575 INFO L225 Difference]: With dead ends: 98 [2021-08-12 19:42:07,575 INFO L226 Difference]: Without dead ends: 89 [2021-08-12 19:42:07,577 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:42:07,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-08-12 19:42:07,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-08-12 19:42:07,613 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) [2021-08-12 19:42:07,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 312 transitions. [2021-08-12 19:42:07,617 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 312 transitions. Word has length 15 [2021-08-12 19:42:07,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:07,618 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 312 transitions. [2021-08-12 19:42:07,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:07,618 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 312 transitions. [2021-08-12 19:42:07,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 19:42:07,620 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:07,620 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:07,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-12 19:42:07,620 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:07,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:07,621 INFO L82 PathProgramCache]: Analyzing trace with hash -759854521, now seen corresponding path program 1 times [2021-08-12 19:42:07,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:07,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546514510] [2021-08-12 19:42:07,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:07,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:07,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:07,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:07,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546514510] [2021-08-12 19:42:07,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546514510] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:07,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359383111] [2021-08-12 19:42:07,677 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 [2021-08-12 19:42:07,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:07,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-12 19:42:07,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:07,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:07,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359383111] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:07,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:07,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-08-12 19:42:07,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335824756] [2021-08-12 19:42:07,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 19:42:07,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:07,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 19:42:07,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:42:07,857 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) [2021-08-12 19:42:07,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:07,892 INFO L93 Difference]: Finished difference Result 122 states and 427 transitions. [2021-08-12 19:42:07,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 19:42:07,893 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 [2021-08-12 19:42:07,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:07,894 INFO L225 Difference]: With dead ends: 122 [2021-08-12 19:42:07,894 INFO L226 Difference]: Without dead ends: 106 [2021-08-12 19:42:07,895 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.7ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:42:07,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-08-12 19:42:07,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2021-08-12 19:42:07,901 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) [2021-08-12 19:42:07,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 295 transitions. [2021-08-12 19:42:07,903 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 295 transitions. Word has length 16 [2021-08-12 19:42:07,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:07,903 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 295 transitions. [2021-08-12 19:42:07,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:07,903 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 295 transitions. [2021-08-12 19:42:07,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 19:42:07,904 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:07,904 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:08,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-08-12 19:42:08,123 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:08,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:08,123 INFO L82 PathProgramCache]: Analyzing trace with hash -263000223, now seen corresponding path program 1 times [2021-08-12 19:42:08,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:08,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25963484] [2021-08-12 19:42:08,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:08,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:08,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:08,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:08,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25963484] [2021-08-12 19:42:08,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25963484] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:42:08,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:42:08,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-12 19:42:08,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219777737] [2021-08-12 19:42:08,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 19:42:08,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:08,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 19:42:08,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:42:08,174 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) [2021-08-12 19:42:08,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:08,195 INFO L93 Difference]: Finished difference Result 170 states and 601 transitions. [2021-08-12 19:42:08,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 19:42:08,201 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 [2021-08-12 19:42:08,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:08,204 INFO L225 Difference]: With dead ends: 170 [2021-08-12 19:42:08,204 INFO L226 Difference]: Without dead ends: 121 [2021-08-12 19:42:08,204 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:42:08,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-08-12 19:42:08,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 98. [2021-08-12 19:42:08,212 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) [2021-08-12 19:42:08,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 337 transitions. [2021-08-12 19:42:08,214 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 337 transitions. Word has length 16 [2021-08-12 19:42:08,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:08,214 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 337 transitions. [2021-08-12 19:42:08,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:08,214 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 337 transitions. [2021-08-12 19:42:08,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 19:42:08,215 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:08,215 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:08,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-12 19:42:08,215 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:08,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:08,215 INFO L82 PathProgramCache]: Analyzing trace with hash 675491683, now seen corresponding path program 1 times [2021-08-12 19:42:08,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:08,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512062695] [2021-08-12 19:42:08,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:08,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:08,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:08,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512062695] [2021-08-12 19:42:08,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512062695] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:42:08,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:42:08,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-12 19:42:08,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45368672] [2021-08-12 19:42:08,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 19:42:08,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:08,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 19:42:08,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:42:08,244 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) [2021-08-12 19:42:08,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:08,264 INFO L93 Difference]: Finished difference Result 143 states and 496 transitions. [2021-08-12 19:42:08,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 19:42:08,265 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 [2021-08-12 19:42:08,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:08,265 INFO L225 Difference]: With dead ends: 143 [2021-08-12 19:42:08,266 INFO L226 Difference]: Without dead ends: 64 [2021-08-12 19:42:08,266 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:42:08,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-12 19:42:08,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-08-12 19:42:08,270 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) [2021-08-12 19:42:08,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 208 transitions. [2021-08-12 19:42:08,271 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 208 transitions. Word has length 16 [2021-08-12 19:42:08,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:08,271 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 208 transitions. [2021-08-12 19:42:08,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:08,271 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 208 transitions. [2021-08-12 19:42:08,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 19:42:08,272 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:08,272 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:08,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-12 19:42:08,272 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:08,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:08,272 INFO L82 PathProgramCache]: Analyzing trace with hash 135060591, now seen corresponding path program 1 times [2021-08-12 19:42:08,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:08,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482044619] [2021-08-12 19:42:08,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:08,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:08,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:08,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:08,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482044619] [2021-08-12 19:42:08,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482044619] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:08,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714482781] [2021-08-12 19:42:08,300 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 [2021-08-12 19:42:08,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:08,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-12 19:42:08,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:08,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:08,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714482781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:08,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:08,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-08-12 19:42:08,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537102406] [2021-08-12 19:42:08,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 19:42:08,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:08,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 19:42:08,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:42:08,433 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) [2021-08-12 19:42:08,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:08,451 INFO L93 Difference]: Finished difference Result 117 states and 391 transitions. [2021-08-12 19:42:08,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 19:42:08,451 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 [2021-08-12 19:42:08,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:08,452 INFO L225 Difference]: With dead ends: 117 [2021-08-12 19:42:08,452 INFO L226 Difference]: Without dead ends: 108 [2021-08-12 19:42:08,452 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.3ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:42:08,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-08-12 19:42:08,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-08-12 19:42:08,457 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) [2021-08-12 19:42:08,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 367 transitions. [2021-08-12 19:42:08,458 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 367 transitions. Word has length 16 [2021-08-12 19:42:08,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:08,458 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 367 transitions. [2021-08-12 19:42:08,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:08,459 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 367 transitions. [2021-08-12 19:42:08,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:42:08,459 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:08,459 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:08,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:08,664 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:08,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:08,664 INFO L82 PathProgramCache]: Analyzing trace with hash -107519000, now seen corresponding path program 1 times [2021-08-12 19:42:08,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:08,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298757714] [2021-08-12 19:42:08,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:08,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:08,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:42:08,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:08,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298757714] [2021-08-12 19:42:08,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298757714] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:42:08,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:42:08,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-12 19:42:08,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331310405] [2021-08-12 19:42:08,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 19:42:08,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:08,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 19:42:08,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:42:08,696 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) [2021-08-12 19:42:08,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:08,714 INFO L93 Difference]: Finished difference Result 141 states and 482 transitions. [2021-08-12 19:42:08,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 19:42:08,721 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 [2021-08-12 19:42:08,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:08,722 INFO L225 Difference]: With dead ends: 141 [2021-08-12 19:42:08,722 INFO L226 Difference]: Without dead ends: 54 [2021-08-12 19:42:08,723 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:42:08,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-12 19:42:08,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-08-12 19:42:08,726 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) [2021-08-12 19:42:08,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 161 transitions. [2021-08-12 19:42:08,726 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 161 transitions. Word has length 17 [2021-08-12 19:42:08,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:08,726 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 161 transitions. [2021-08-12 19:42:08,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:08,727 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 161 transitions. [2021-08-12 19:42:08,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:42:08,727 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:08,727 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:08,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-12 19:42:08,727 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:08,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:08,728 INFO L82 PathProgramCache]: Analyzing trace with hash -2041236514, now seen corresponding path program 2 times [2021-08-12 19:42:08,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:08,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149596710] [2021-08-12 19:42:08,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:08,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:08,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:08,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:08,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149596710] [2021-08-12 19:42:08,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149596710] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:08,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631180550] [2021-08-12 19:42:08,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:08,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:42:08,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:08,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-12 19:42:08,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:08,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:08,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631180550] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:08,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:08,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-08-12 19:42:08,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728219571] [2021-08-12 19:42:08,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:42:08,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:08,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:42:08,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:42:08,921 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) [2021-08-12 19:42:08,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:08,957 INFO L93 Difference]: Finished difference Result 95 states and 300 transitions. [2021-08-12 19:42:08,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:42:08,958 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 [2021-08-12 19:42:08,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:08,959 INFO L225 Difference]: With dead ends: 95 [2021-08-12 19:42:08,959 INFO L226 Difference]: Without dead ends: 88 [2021-08-12 19:42:08,961 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 49.0ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:42:08,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-08-12 19:42:08,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-08-12 19:42:08,976 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) [2021-08-12 19:42:08,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 283 transitions. [2021-08-12 19:42:08,976 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 283 transitions. Word has length 17 [2021-08-12 19:42:08,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:08,976 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 283 transitions. [2021-08-12 19:42:08,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:08,977 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 283 transitions. [2021-08-12 19:42:08,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:42:08,977 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:08,977 INFO L550 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:09,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:09,178 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:09,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:09,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1146747481, now seen corresponding path program 3 times [2021-08-12 19:42:09,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:09,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424420016] [2021-08-12 19:42:09,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:09,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:09,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:09,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:09,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424420016] [2021-08-12 19:42:09,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424420016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:09,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246774476] [2021-08-12 19:42:09,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:09,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:42:09,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:09,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-12 19:42:09,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:09,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:09,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246774476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:09,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:09,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-08-12 19:42:09,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242170261] [2021-08-12 19:42:09,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:42:09,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:09,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:42:09,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:42:09,531 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) [2021-08-12 19:42:09,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:09,637 INFO L93 Difference]: Finished difference Result 185 states and 628 transitions. [2021-08-12 19:42:09,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:42:09,637 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 [2021-08-12 19:42:09,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:09,638 INFO L225 Difference]: With dead ends: 185 [2021-08-12 19:42:09,638 INFO L226 Difference]: Without dead ends: 135 [2021-08-12 19:42:09,639 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 127.0ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:42:09,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-08-12 19:42:09,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 106. [2021-08-12 19:42:09,643 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) [2021-08-12 19:42:09,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 370 transitions. [2021-08-12 19:42:09,644 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 370 transitions. Word has length 18 [2021-08-12 19:42:09,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:09,644 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 370 transitions. [2021-08-12 19:42:09,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:09,644 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 370 transitions. [2021-08-12 19:42:09,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:42:09,645 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:09,645 INFO L550 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:09,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:09,862 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:09,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:09,862 INFO L82 PathProgramCache]: Analyzing trace with hash 613124629, now seen corresponding path program 4 times [2021-08-12 19:42:09,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:09,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317241444] [2021-08-12 19:42:09,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:09,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:09,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:09,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:09,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317241444] [2021-08-12 19:42:09,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317241444] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:09,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525119392] [2021-08-12 19:42:09,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:09,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:42:09,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:09,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:42:09,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:10,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:10,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525119392] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:10,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:10,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-12 19:42:10,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153814100] [2021-08-12 19:42:10,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:42:10,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:10,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:42:10,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:42:10,052 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) [2021-08-12 19:42:10,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:10,098 INFO L93 Difference]: Finished difference Result 181 states and 631 transitions. [2021-08-12 19:42:10,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:42:10,098 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 [2021-08-12 19:42:10,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:10,099 INFO L225 Difference]: With dead ends: 181 [2021-08-12 19:42:10,100 INFO L226 Difference]: Without dead ends: 169 [2021-08-12 19:42:10,100 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 55.3ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:42:10,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-08-12 19:42:10,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 133. [2021-08-12 19:42:10,105 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) [2021-08-12 19:42:10,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 491 transitions. [2021-08-12 19:42:10,106 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 491 transitions. Word has length 18 [2021-08-12 19:42:10,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:10,106 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 491 transitions. [2021-08-12 19:42:10,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:10,107 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 491 transitions. [2021-08-12 19:42:10,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:42:10,107 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:10,107 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:10,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-12 19:42:10,321 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:10,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:10,321 INFO L82 PathProgramCache]: Analyzing trace with hash 64866445, now seen corresponding path program 1 times [2021-08-12 19:42:10,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:10,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043994778] [2021-08-12 19:42:10,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:10,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:10,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:10,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:10,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043994778] [2021-08-12 19:42:10,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043994778] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:10,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886826238] [2021-08-12 19:42:10,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:10,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:10,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 19:42:10,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:10,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:10,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886826238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:10,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:10,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-08-12 19:42:10,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809513728] [2021-08-12 19:42:10,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 19:42:10,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:10,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 19:42:10,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-12 19:42:10,519 INFO L87 Difference]: Start difference. First operand 133 states and 491 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:10,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:10,584 INFO L93 Difference]: Finished difference Result 288 states and 1078 transitions. [2021-08-12 19:42:10,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:42:10,584 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-12 19:42:10,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:10,586 INFO L225 Difference]: With dead ends: 288 [2021-08-12 19:42:10,586 INFO L226 Difference]: Without dead ends: 205 [2021-08-12 19:42:10,586 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 88.8ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:42:10,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-08-12 19:42:10,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 162. [2021-08-12 19:42:10,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 3.751552795031056) internal successors, (604), 161 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:10,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 604 transitions. [2021-08-12 19:42:10,593 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 604 transitions. Word has length 18 [2021-08-12 19:42:10,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:10,593 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 604 transitions. [2021-08-12 19:42:10,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:10,593 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 604 transitions. [2021-08-12 19:42:10,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:42:10,593 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:10,594 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:10,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:10,800 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:10,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:10,800 INFO L82 PathProgramCache]: Analyzing trace with hash 764509993, now seen corresponding path program 1 times [2021-08-12 19:42:10,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:10,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168672174] [2021-08-12 19:42:10,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:10,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:10,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:10,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:10,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168672174] [2021-08-12 19:42:10,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168672174] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:10,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256081043] [2021-08-12 19:42:10,828 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 [2021-08-12 19:42:10,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:10,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 19:42:10,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:11,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:11,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256081043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:11,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:11,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-08-12 19:42:11,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687692964] [2021-08-12 19:42:11,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 19:42:11,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:11,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 19:42:11,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-12 19:42:11,008 INFO L87 Difference]: Start difference. First operand 162 states and 604 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:11,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:11,034 INFO L93 Difference]: Finished difference Result 240 states and 897 transitions. [2021-08-12 19:42:11,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 19:42:11,034 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 [2021-08-12 19:42:11,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:11,035 INFO L225 Difference]: With dead ends: 240 [2021-08-12 19:42:11,035 INFO L226 Difference]: Without dead ends: 126 [2021-08-12 19:42:11,036 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 47.9ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-12 19:42:11,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-08-12 19:42:11,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-08-12 19:42:11,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 3.624) internal successors, (453), 125 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:11,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 453 transitions. [2021-08-12 19:42:11,041 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 453 transitions. Word has length 18 [2021-08-12 19:42:11,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:11,042 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 453 transitions. [2021-08-12 19:42:11,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:11,042 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 453 transitions. [2021-08-12 19:42:11,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:42:11,044 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:11,044 INFO L550 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:11,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:11,261 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:11,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:11,261 INFO L82 PathProgramCache]: Analyzing trace with hash 806923496, now seen corresponding path program 2 times [2021-08-12 19:42:11,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:11,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780128251] [2021-08-12 19:42:11,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:11,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:11,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:11,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:11,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780128251] [2021-08-12 19:42:11,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780128251] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:11,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974811756] [2021-08-12 19:42:11,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:11,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:42:11,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:11,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 19:42:11,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:11,447 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 [2021-08-12 19:42:11,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:11,451 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 [2021-08-12 19:42:11,452 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:11,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:42:11,473 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. [2021-08-12 19:42:11,473 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:57 [2021-08-12 19:42:11,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:11,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974811756] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:11,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:11,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-12 19:42:11,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631138376] [2021-08-12 19:42:11,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:42:11,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:11,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:42:11,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:42:11,573 INFO L87 Difference]: Start difference. First operand 126 states and 453 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:11,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:11,716 INFO L93 Difference]: Finished difference Result 218 states and 798 transitions. [2021-08-12 19:42:11,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 19:42:11,716 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:42:11,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:11,717 INFO L225 Difference]: With dead ends: 218 [2021-08-12 19:42:11,718 INFO L226 Difference]: Without dead ends: 141 [2021-08-12 19:42:11,718 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 201.6ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:42:11,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-08-12 19:42:11,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 133. [2021-08-12 19:42:11,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 3.5757575757575757) internal successors, (472), 132 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:11,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 472 transitions. [2021-08-12 19:42:11,724 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 472 transitions. Word has length 19 [2021-08-12 19:42:11,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:11,725 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 472 transitions. [2021-08-12 19:42:11,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:11,725 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 472 transitions. [2021-08-12 19:42:11,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:42:11,726 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:11,726 INFO L550 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:11,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-12 19:42:11,942 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:11,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:11,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1447544248, now seen corresponding path program 2 times [2021-08-12 19:42:11,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:11,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233061170] [2021-08-12 19:42:11,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:11,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:11,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:11,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:11,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233061170] [2021-08-12 19:42:11,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233061170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:11,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570382450] [2021-08-12 19:42:11,984 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 [2021-08-12 19:42:12,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:42:12,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:12,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 19:42:12,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:12,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:12,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570382450] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:12,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:12,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-08-12 19:42:12,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965631198] [2021-08-12 19:42:12,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:42:12,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:12,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:42:12,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:42:12,204 INFO L87 Difference]: Start difference. First operand 133 states and 472 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:12,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:12,314 INFO L93 Difference]: Finished difference Result 263 states and 962 transitions. [2021-08-12 19:42:12,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:42:12,315 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 [2021-08-12 19:42:12,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:12,316 INFO L225 Difference]: With dead ends: 263 [2021-08-12 19:42:12,316 INFO L226 Difference]: Without dead ends: 256 [2021-08-12 19:42:12,316 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 157.2ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:42:12,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-08-12 19:42:12,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 169. [2021-08-12 19:42:12,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 3.9404761904761907) internal successors, (662), 168 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:12,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 662 transitions. [2021-08-12 19:42:12,326 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 662 transitions. Word has length 19 [2021-08-12 19:42:12,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:12,327 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 662 transitions. [2021-08-12 19:42:12,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:12,327 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 662 transitions. [2021-08-12 19:42:12,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:42:12,328 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:12,328 INFO L550 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:12,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-12 19:42:12,544 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:12,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:12,545 INFO L82 PathProgramCache]: Analyzing trace with hash 820488117, now seen corresponding path program 5 times [2021-08-12 19:42:12,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:12,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518447628] [2021-08-12 19:42:12,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:12,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:12,674 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:12,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:12,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518447628] [2021-08-12 19:42:12,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518447628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:12,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841155480] [2021-08-12 19:42:12,675 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 [2021-08-12 19:42:12,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:42:12,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:12,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:42:12,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:12,797 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 [2021-08-12 19:42:12,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:12,800 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 [2021-08-12 19:42:12,801 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:12,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:42:12,821 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. [2021-08-12 19:42:12,821 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:57 [2021-08-12 19:42:12,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:42:12,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841155480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:12,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:12,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-08-12 19:42:12,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814674239] [2021-08-12 19:42:12,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:42:12,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:12,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:42:12,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:42:12,909 INFO L87 Difference]: Start difference. First operand 169 states and 662 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:13,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:13,096 INFO L93 Difference]: Finished difference Result 370 states and 1408 transitions. [2021-08-12 19:42:13,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 19:42:13,097 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 [2021-08-12 19:42:13,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:13,098 INFO L225 Difference]: With dead ends: 370 [2021-08-12 19:42:13,099 INFO L226 Difference]: Without dead ends: 275 [2021-08-12 19:42:13,099 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 255.5ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:42:13,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-08-12 19:42:13,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 189. [2021-08-12 19:42:13,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 4.0) internal successors, (752), 188 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:13,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 752 transitions. [2021-08-12 19:42:13,107 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 752 transitions. Word has length 20 [2021-08-12 19:42:13,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:13,107 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 752 transitions. [2021-08-12 19:42:13,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:13,107 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 752 transitions. [2021-08-12 19:42:13,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:42:13,109 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:13,109 INFO L550 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:13,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:13,325 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:13,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:13,325 INFO L82 PathProgramCache]: Analyzing trace with hash 924426037, now seen corresponding path program 6 times [2021-08-12 19:42:13,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:13,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578991660] [2021-08-12 19:42:13,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:13,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:13,386 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:13,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:13,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578991660] [2021-08-12 19:42:13,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578991660] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:13,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677293727] [2021-08-12 19:42:13,387 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:42:13,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 19:42:13,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:13,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:42:13,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:13,573 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:13,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677293727] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:13,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:13,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-08-12 19:42:13,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852981110] [2021-08-12 19:42:13,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:42:13,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:13,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:42:13,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:42:13,575 INFO L87 Difference]: Start difference. First operand 189 states and 752 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:13,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:13,654 INFO L93 Difference]: Finished difference Result 351 states and 1427 transitions. [2021-08-12 19:42:13,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:42:13,654 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 [2021-08-12 19:42:13,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:13,656 INFO L225 Difference]: With dead ends: 351 [2021-08-12 19:42:13,656 INFO L226 Difference]: Without dead ends: 207 [2021-08-12 19:42:13,656 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 124.4ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:42:13,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-08-12 19:42:13,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 191. [2021-08-12 19:42:13,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 3.968421052631579) internal successors, (754), 190 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:13,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 754 transitions. [2021-08-12 19:42:13,665 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 754 transitions. Word has length 20 [2021-08-12 19:42:13,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:13,665 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 754 transitions. [2021-08-12 19:42:13,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:13,665 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 754 transitions. [2021-08-12 19:42:13,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:42:13,665 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:13,665 INFO L550 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:13,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-12 19:42:13,882 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:13,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:13,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1959111699, now seen corresponding path program 3 times [2021-08-12 19:42:13,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:13,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841620674] [2021-08-12 19:42:13,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:13,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:14,008 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:14,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:14,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841620674] [2021-08-12 19:42:14,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841620674] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:14,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105263706] [2021-08-12 19:42:14,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:14,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 19:42:14,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:14,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 19:42:14,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:14,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-12 19:42:14,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:14,142 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 [2021-08-12 19:42:14,143 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:14,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:42:14,166 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. [2021-08-12 19:42:14,166 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:57 [2021-08-12 19:42:14,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:14,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105263706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:14,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:14,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-08-12 19:42:14,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028656476] [2021-08-12 19:42:14,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:42:14,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:14,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:42:14,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:42:14,253 INFO L87 Difference]: Start difference. First operand 191 states and 754 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:14,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:14,381 INFO L93 Difference]: Finished difference Result 511 states and 2069 transitions. [2021-08-12 19:42:14,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:42:14,382 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-12 19:42:14,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:14,385 INFO L225 Difference]: With dead ends: 511 [2021-08-12 19:42:14,385 INFO L226 Difference]: Without dead ends: 504 [2021-08-12 19:42:14,385 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 166.0ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:42:14,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-08-12 19:42:14,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 259. [2021-08-12 19:42:14,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 4.37984496124031) internal successors, (1130), 258 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:14,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 1130 transitions. [2021-08-12 19:42:14,400 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 1130 transitions. Word has length 20 [2021-08-12 19:42:14,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:14,400 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 1130 transitions. [2021-08-12 19:42:14,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:14,401 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 1130 transitions. [2021-08-12 19:42:14,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:42:14,401 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:14,401 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:14,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-12 19:42:14,617 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:14,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:14,617 INFO L82 PathProgramCache]: Analyzing trace with hash -626942165, now seen corresponding path program 3 times [2021-08-12 19:42:14,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:14,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832477098] [2021-08-12 19:42:14,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:14,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:14,663 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:14,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:14,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832477098] [2021-08-12 19:42:14,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832477098] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:14,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642547770] [2021-08-12 19:42:14,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:42:14,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:42:14,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:14,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:42:14,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:14,887 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:14,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642547770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:14,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:14,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-08-12 19:42:14,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388413610] [2021-08-12 19:42:14,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:42:14,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:14,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:42:14,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:42:14,888 INFO L87 Difference]: Start difference. First operand 259 states and 1130 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:15,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:15,050 INFO L93 Difference]: Finished difference Result 496 states and 2046 transitions. [2021-08-12 19:42:15,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:42:15,050 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 [2021-08-12 19:42:15,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:15,053 INFO L225 Difference]: With dead ends: 496 [2021-08-12 19:42:15,053 INFO L226 Difference]: Without dead ends: 489 [2021-08-12 19:42:15,053 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 176.6ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:42:15,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-08-12 19:42:15,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 286. [2021-08-12 19:42:15,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 4.494736842105263) internal successors, (1281), 285 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:15,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 1281 transitions. [2021-08-12 19:42:15,069 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 1281 transitions. Word has length 20 [2021-08-12 19:42:15,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:15,069 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 1281 transitions. [2021-08-12 19:42:15,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:15,069 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 1281 transitions. [2021-08-12 19:42:15,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:42:15,070 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:15,070 INFO L550 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:15,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-08-12 19:42:15,273 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:15,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:15,274 INFO L82 PathProgramCache]: Analyzing trace with hash -760999699, now seen corresponding path program 4 times [2021-08-12 19:42:15,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:15,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844972415] [2021-08-12 19:42:15,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:15,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:15,320 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:15,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:15,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844972415] [2021-08-12 19:42:15,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844972415] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:15,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721122490] [2021-08-12 19:42:15,320 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 [2021-08-12 19:42:15,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:42:15,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:15,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:42:15,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:15,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:15,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721122490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:15,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:15,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-08-12 19:42:15,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982962385] [2021-08-12 19:42:15,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:42:15,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:15,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:42:15,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:42:15,474 INFO L87 Difference]: Start difference. First operand 286 states and 1281 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:15,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:15,551 INFO L93 Difference]: Finished difference Result 347 states and 1498 transitions. [2021-08-12 19:42:15,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:42:15,551 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-12 19:42:15,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:15,554 INFO L225 Difference]: With dead ends: 347 [2021-08-12 19:42:15,554 INFO L226 Difference]: Without dead ends: 340 [2021-08-12 19:42:15,555 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 86.7ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:42:15,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-08-12 19:42:15,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 294. [2021-08-12 19:42:15,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 4.505119453924915) internal successors, (1320), 293 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:15,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 1320 transitions. [2021-08-12 19:42:15,571 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 1320 transitions. Word has length 20 [2021-08-12 19:42:15,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:15,571 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 1320 transitions. [2021-08-12 19:42:15,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:15,571 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 1320 transitions. [2021-08-12 19:42:15,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 19:42:15,572 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:15,572 INFO L550 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:15,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:15,785 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:15,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:15,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1175269464, now seen corresponding path program 7 times [2021-08-12 19:42:15,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:15,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337691003] [2021-08-12 19:42:15,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:15,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:15,868 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:42:15,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:15,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337691003] [2021-08-12 19:42:15,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337691003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:15,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110261482] [2021-08-12 19:42:15,868 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 [2021-08-12 19:42:15,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:15,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-12 19:42:15,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:16,010 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 [2021-08-12 19:42:16,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:16,014 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 [2021-08-12 19:42:16,015 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:16,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:42:16,043 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 [2021-08-12 19:42:16,044 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:16,046 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 [2021-08-12 19:42:16,047 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:16,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:42:16,070 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. [2021-08-12 19:42:16,071 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:85, output treesize:57 [2021-08-12 19:42:16,136 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:42:16,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110261482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:16,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:16,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-12 19:42:16,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552238795] [2021-08-12 19:42:16,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:42:16,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:16,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:42:16,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:42:16,137 INFO L87 Difference]: Start difference. First operand 294 states and 1320 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:16,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:16,358 INFO L93 Difference]: Finished difference Result 583 states and 2539 transitions. [2021-08-12 19:42:16,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:42:16,359 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 [2021-08-12 19:42:16,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:16,361 INFO L225 Difference]: With dead ends: 583 [2021-08-12 19:42:16,362 INFO L226 Difference]: Without dead ends: 397 [2021-08-12 19:42:16,362 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 295.1ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:42:16,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-08-12 19:42:16,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 322. [2021-08-12 19:42:16,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 4.336448598130841) internal successors, (1392), 321 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:16,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 1392 transitions. [2021-08-12 19:42:16,379 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 1392 transitions. Word has length 21 [2021-08-12 19:42:16,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:16,379 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 1392 transitions. [2021-08-12 19:42:16,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:16,379 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 1392 transitions. [2021-08-12 19:42:16,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 19:42:16,380 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:16,380 INFO L550 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:16,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-12 19:42:16,593 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:16,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:16,593 INFO L82 PathProgramCache]: Analyzing trace with hash -105496252, now seen corresponding path program 4 times [2021-08-12 19:42:16,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:16,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278763394] [2021-08-12 19:42:16,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:16,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:16,657 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:16,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:16,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278763394] [2021-08-12 19:42:16,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278763394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:16,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634022952] [2021-08-12 19:42:16,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:42:16,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:42:16,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:16,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:42:16,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:16,765 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 [2021-08-12 19:42:16,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:16,769 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 [2021-08-12 19:42:16,770 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:16,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:42:16,790 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. [2021-08-12 19:42:16,790 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:57 [2021-08-12 19:42:16,934 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:16,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634022952] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:16,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:16,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-12 19:42:16,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654447755] [2021-08-12 19:42:16,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:42:16,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:16,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:42:16,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:42:16,936 INFO L87 Difference]: Start difference. First operand 322 states and 1392 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:17,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:17,255 INFO L93 Difference]: Finished difference Result 870 states and 3555 transitions. [2021-08-12 19:42:17,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:42:17,256 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 19:42:17,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:17,261 INFO L225 Difference]: With dead ends: 870 [2021-08-12 19:42:17,261 INFO L226 Difference]: Without dead ends: 841 [2021-08-12 19:42:17,262 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 319.4ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:42:17,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-08-12 19:42:17,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 415. [2021-08-12 19:42:17,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 4.545893719806763) internal successors, (1882), 414 states have internal predecessors, (1882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:17,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1882 transitions. [2021-08-12 19:42:17,287 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1882 transitions. Word has length 21 [2021-08-12 19:42:17,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:17,288 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1882 transitions. [2021-08-12 19:42:17,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:17,288 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1882 transitions. [2021-08-12 19:42:17,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 19:42:17,289 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:17,289 INFO L550 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:17,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-12 19:42:17,505 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:17,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:17,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1429441592, now seen corresponding path program 5 times [2021-08-12 19:42:17,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:17,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069842555] [2021-08-12 19:42:17,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:17,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:17,608 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:17,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:17,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069842555] [2021-08-12 19:42:17,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069842555] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:17,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655440795] [2021-08-12 19:42:17,609 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 [2021-08-12 19:42:17,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 19:42:17,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:17,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:42:17,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:17,821 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:17,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655440795] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:17,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:17,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-12 19:42:17,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494202164] [2021-08-12 19:42:17,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:42:17,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:17,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:42:17,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:42:17,824 INFO L87 Difference]: Start difference. First operand 415 states and 1882 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:17,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:17,925 INFO L93 Difference]: Finished difference Result 589 states and 2621 transitions. [2021-08-12 19:42:17,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:42:17,926 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 [2021-08-12 19:42:17,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:17,928 INFO L225 Difference]: With dead ends: 589 [2021-08-12 19:42:17,928 INFO L226 Difference]: Without dead ends: 429 [2021-08-12 19:42:17,929 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 173.5ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:42:17,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-08-12 19:42:17,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 415. [2021-08-12 19:42:17,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 4.531400966183575) internal successors, (1876), 414 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:17,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1876 transitions. [2021-08-12 19:42:17,951 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1876 transitions. Word has length 21 [2021-08-12 19:42:17,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:17,951 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1876 transitions. [2021-08-12 19:42:17,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:17,951 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1876 transitions. [2021-08-12 19:42:17,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 19:42:17,953 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:17,953 INFO L550 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:18,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:18,170 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:18,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:18,171 INFO L82 PathProgramCache]: Analyzing trace with hash -958081368, now seen corresponding path program 5 times [2021-08-12 19:42:18,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:18,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350669043] [2021-08-12 19:42:18,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:18,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:18,232 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:18,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:18,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350669043] [2021-08-12 19:42:18,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350669043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:18,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974368132] [2021-08-12 19:42:18,233 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:18,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 19:42:18,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:18,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 19:42:18,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:18,475 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:18,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974368132] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:18,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:18,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-12 19:42:18,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805209883] [2021-08-12 19:42:18,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:42:18,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:18,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:42:18,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:42:18,476 INFO L87 Difference]: Start difference. First operand 415 states and 1876 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:18,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:18,717 INFO L93 Difference]: Finished difference Result 1229 states and 5384 transitions. [2021-08-12 19:42:18,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:42:18,718 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 [2021-08-12 19:42:18,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:18,723 INFO L225 Difference]: With dead ends: 1229 [2021-08-12 19:42:18,724 INFO L226 Difference]: Without dead ends: 1006 [2021-08-12 19:42:18,724 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 219.8ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:42:18,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2021-08-12 19:42:18,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 655. [2021-08-12 19:42:18,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 4.792048929663609) internal successors, (3134), 654 states have internal predecessors, (3134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:18,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 3134 transitions. [2021-08-12 19:42:18,764 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 3134 transitions. Word has length 21 [2021-08-12 19:42:18,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:18,764 INFO L482 AbstractCegarLoop]: Abstraction has 655 states and 3134 transitions. [2021-08-12 19:42:18,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:18,764 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 3134 transitions. [2021-08-12 19:42:18,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 19:42:18,766 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:18,766 INFO L550 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:18,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-12 19:42:18,983 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:18,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:18,983 INFO L82 PathProgramCache]: Analyzing trace with hash -536313780, now seen corresponding path program 6 times [2021-08-12 19:42:18,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:18,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759874184] [2021-08-12 19:42:18,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:18,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:19,086 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:19,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:19,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759874184] [2021-08-12 19:42:19,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759874184] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:19,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759346922] [2021-08-12 19:42:19,086 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:19,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 19:42:19,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:19,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 19:42:19,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:19,269 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:19,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759346922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:19,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:19,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-08-12 19:42:19,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686427241] [2021-08-12 19:42:19,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:42:19,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:19,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:42:19,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:42:19,270 INFO L87 Difference]: Start difference. First operand 655 states and 3134 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:19,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:19,459 INFO L93 Difference]: Finished difference Result 882 states and 4074 transitions. [2021-08-12 19:42:19,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:42:19,460 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 19:42:19,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:19,464 INFO L225 Difference]: With dead ends: 882 [2021-08-12 19:42:19,465 INFO L226 Difference]: Without dead ends: 713 [2021-08-12 19:42:19,465 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 194.3ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:42:19,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-08-12 19:42:19,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 663. [2021-08-12 19:42:19,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 4.7734138972809665) internal successors, (3160), 662 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:19,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 3160 transitions. [2021-08-12 19:42:19,499 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 3160 transitions. Word has length 21 [2021-08-12 19:42:19,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:19,500 INFO L482 AbstractCegarLoop]: Abstraction has 663 states and 3160 transitions. [2021-08-12 19:42:19,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:19,500 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 3160 transitions. [2021-08-12 19:42:19,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 19:42:19,502 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:19,502 INFO L550 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:19,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-12 19:42:19,713 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:19,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:19,713 INFO L82 PathProgramCache]: Analyzing trace with hash -818897626, now seen corresponding path program 7 times [2021-08-12 19:42:19,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:19,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617606040] [2021-08-12 19:42:19,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:19,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:19,769 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:19,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:19,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617606040] [2021-08-12 19:42:19,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617606040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:19,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534403291] [2021-08-12 19:42:19,770 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:19,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:19,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:42:19,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:19,924 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 [2021-08-12 19:42:19,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:19,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:42:19,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:42:19,931 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:22 [2021-08-12 19:42:19,958 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:19,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534403291] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:19,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:19,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-08-12 19:42:19,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495734318] [2021-08-12 19:42:19,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:42:19,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:19,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:42:19,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:42:19,959 INFO L87 Difference]: Start difference. First operand 663 states and 3160 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:20,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:20,125 INFO L93 Difference]: Finished difference Result 747 states and 3435 transitions. [2021-08-12 19:42:20,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 19:42:20,126 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 [2021-08-12 19:42:20,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:20,131 INFO L225 Difference]: With dead ends: 747 [2021-08-12 19:42:20,131 INFO L226 Difference]: Without dead ends: 740 [2021-08-12 19:42:20,131 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 163.7ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:42:20,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-08-12 19:42:20,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 663. [2021-08-12 19:42:20,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 4.7734138972809665) internal successors, (3160), 662 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:20,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 3160 transitions. [2021-08-12 19:42:20,166 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 3160 transitions. Word has length 21 [2021-08-12 19:42:20,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:20,167 INFO L482 AbstractCegarLoop]: Abstraction has 663 states and 3160 transitions. [2021-08-12 19:42:20,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:20,167 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 3160 transitions. [2021-08-12 19:42:20,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 19:42:20,168 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:20,168 INFO L550 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:20,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-12 19:42:20,385 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:20,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:20,385 INFO L82 PathProgramCache]: Analyzing trace with hash -979212920, now seen corresponding path program 8 times [2021-08-12 19:42:20,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:20,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729994137] [2021-08-12 19:42:20,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:20,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:20,512 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:20,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:20,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729994137] [2021-08-12 19:42:20,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729994137] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:20,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713623517] [2021-08-12 19:42:20,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:20,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:42:20,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:20,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:42:20,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:20,690 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:20,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713623517] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:20,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:20,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-08-12 19:42:20,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299513237] [2021-08-12 19:42:20,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:42:20,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:20,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:42:20,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:42:20,691 INFO L87 Difference]: Start difference. First operand 663 states and 3160 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:20,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:20,945 INFO L93 Difference]: Finished difference Result 873 states and 4044 transitions. [2021-08-12 19:42:20,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 19:42:20,945 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 19:42:20,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:20,950 INFO L225 Difference]: With dead ends: 873 [2021-08-12 19:42:20,950 INFO L226 Difference]: Without dead ends: 704 [2021-08-12 19:42:20,950 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 324.0ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:42:20,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-08-12 19:42:20,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 666. [2021-08-12 19:42:20,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 4.774436090225564) internal successors, (3175), 665 states have internal predecessors, (3175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:20,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 3175 transitions. [2021-08-12 19:42:20,984 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 3175 transitions. Word has length 21 [2021-08-12 19:42:20,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:20,984 INFO L482 AbstractCegarLoop]: Abstraction has 666 states and 3175 transitions. [2021-08-12 19:42:20,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:20,984 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 3175 transitions. [2021-08-12 19:42:20,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 19:42:20,986 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:20,986 INFO L550 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:21,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-12 19:42:21,202 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:21,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:21,202 INFO L82 PathProgramCache]: Analyzing trace with hash -278148342, now seen corresponding path program 9 times [2021-08-12 19:42:21,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:21,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546171937] [2021-08-12 19:42:21,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:21,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:21,287 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:21,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:21,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546171937] [2021-08-12 19:42:21,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546171937] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:21,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322233660] [2021-08-12 19:42:21,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:21,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:42:21,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:21,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 19:42:21,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:21,522 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:21,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322233660] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:21,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:21,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-08-12 19:42:21,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766701750] [2021-08-12 19:42:21,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:42:21,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:21,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:42:21,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:42:21,524 INFO L87 Difference]: Start difference. First operand 666 states and 3175 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:21,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:21,859 INFO L93 Difference]: Finished difference Result 1674 states and 7599 transitions. [2021-08-12 19:42:21,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:42:21,859 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 [2021-08-12 19:42:21,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:21,866 INFO L225 Difference]: With dead ends: 1674 [2021-08-12 19:42:21,866 INFO L226 Difference]: Without dead ends: 1272 [2021-08-12 19:42:21,867 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 299.7ms TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:42:21,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2021-08-12 19:42:21,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 737. [2021-08-12 19:42:21,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 4.794836956521739) internal successors, (3529), 736 states have internal predecessors, (3529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:21,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 3529 transitions. [2021-08-12 19:42:21,911 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 3529 transitions. Word has length 21 [2021-08-12 19:42:21,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:21,911 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 3529 transitions. [2021-08-12 19:42:21,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:21,911 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 3529 transitions. [2021-08-12 19:42:21,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 19:42:21,913 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:21,913 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:22,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:22,129 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:22,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:22,129 INFO L82 PathProgramCache]: Analyzing trace with hash -781165444, now seen corresponding path program 1 times [2021-08-12 19:42:22,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:22,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021406209] [2021-08-12 19:42:22,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:22,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:22,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:22,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:22,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021406209] [2021-08-12 19:42:22,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021406209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:22,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925355149] [2021-08-12 19:42:22,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:22,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:22,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 19:42:22,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:22,511 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:42:22,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925355149] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:22,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:22,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-08-12 19:42:22,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500893447] [2021-08-12 19:42:22,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:42:22,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:22,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:42:22,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:42:22,512 INFO L87 Difference]: Start difference. First operand 737 states and 3529 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:22,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:22,900 INFO L93 Difference]: Finished difference Result 1252 states and 5528 transitions. [2021-08-12 19:42:22,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:42:22,900 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 19:42:22,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:22,906 INFO L225 Difference]: With dead ends: 1252 [2021-08-12 19:42:22,906 INFO L226 Difference]: Without dead ends: 881 [2021-08-12 19:42:22,907 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 395.0ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:42:22,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2021-08-12 19:42:22,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 599. [2021-08-12 19:42:22,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 4.806020066889632) internal successors, (2874), 598 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:22,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 2874 transitions. [2021-08-12 19:42:22,942 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 2874 transitions. Word has length 21 [2021-08-12 19:42:22,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:22,942 INFO L482 AbstractCegarLoop]: Abstraction has 599 states and 2874 transitions. [2021-08-12 19:42:22,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:22,942 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 2874 transitions. [2021-08-12 19:42:22,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-12 19:42:22,944 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:22,944 INFO L550 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:23,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-12 19:42:23,157 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:23,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:23,157 INFO L82 PathProgramCache]: Analyzing trace with hash -488176887, now seen corresponding path program 6 times [2021-08-12 19:42:23,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:23,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498811216] [2021-08-12 19:42:23,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:23,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:23,262 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:23,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:23,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498811216] [2021-08-12 19:42:23,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498811216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:23,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617406983] [2021-08-12 19:42:23,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:23,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:42:23,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:23,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 19:42:23,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:23,501 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:23,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617406983] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:23,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:23,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 19:42:23,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657441464] [2021-08-12 19:42:23,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:42:23,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:23,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:42:23,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:42:23,503 INFO L87 Difference]: Start difference. First operand 599 states and 2874 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:23,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:23,768 INFO L93 Difference]: Finished difference Result 1008 states and 4498 transitions. [2021-08-12 19:42:23,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:42:23,768 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 [2021-08-12 19:42:23,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:23,772 INFO L225 Difference]: With dead ends: 1008 [2021-08-12 19:42:23,772 INFO L226 Difference]: Without dead ends: 762 [2021-08-12 19:42:23,773 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 273.9ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:42:23,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-08-12 19:42:23,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 605. [2021-08-12 19:42:23,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 4.821192052980132) internal successors, (2912), 604 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:23,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 2912 transitions. [2021-08-12 19:42:23,806 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 2912 transitions. Word has length 22 [2021-08-12 19:42:23,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:23,806 INFO L482 AbstractCegarLoop]: Abstraction has 605 states and 2912 transitions. [2021-08-12 19:42:23,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:23,806 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 2912 transitions. [2021-08-12 19:42:23,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-12 19:42:23,808 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:23,808 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:24,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:24,024 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:24,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:24,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1712214825, now seen corresponding path program 10 times [2021-08-12 19:42:24,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:24,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339735089] [2021-08-12 19:42:24,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:24,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:24,103 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:24,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:24,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339735089] [2021-08-12 19:42:24,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339735089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:24,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957891401] [2021-08-12 19:42:24,103 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 [2021-08-12 19:42:24,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:42:24,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:24,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:42:24,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:24,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-12 19:42:24,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:24,226 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 [2021-08-12 19:42:24,227 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:24,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:42:24,248 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. [2021-08-12 19:42:24,249 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:75, output treesize:61 [2021-08-12 19:42:24,388 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:24,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957891401] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:24,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:24,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-08-12 19:42:24,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836854709] [2021-08-12 19:42:24,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:42:24,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:24,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:42:24,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:42:24,389 INFO L87 Difference]: Start difference. First operand 605 states and 2912 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:24,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:24,760 INFO L93 Difference]: Finished difference Result 1410 states and 6355 transitions. [2021-08-12 19:42:24,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:42:24,760 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 [2021-08-12 19:42:24,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:24,767 INFO L225 Difference]: With dead ends: 1410 [2021-08-12 19:42:24,767 INFO L226 Difference]: Without dead ends: 1179 [2021-08-12 19:42:24,768 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 320.3ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:42:24,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2021-08-12 19:42:24,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 781. [2021-08-12 19:42:24,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 4.96025641025641) internal successors, (3869), 780 states have internal predecessors, (3869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:24,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 3869 transitions. [2021-08-12 19:42:24,815 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 3869 transitions. Word has length 22 [2021-08-12 19:42:24,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:24,815 INFO L482 AbstractCegarLoop]: Abstraction has 781 states and 3869 transitions. [2021-08-12 19:42:24,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:24,815 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 3869 transitions. [2021-08-12 19:42:24,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-12 19:42:24,817 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:24,817 INFO L550 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:25,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-08-12 19:42:25,033 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:25,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:25,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1902819445, now seen corresponding path program 11 times [2021-08-12 19:42:25,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:25,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198004121] [2021-08-12 19:42:25,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:25,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:25,155 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:25,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:25,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198004121] [2021-08-12 19:42:25,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198004121] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:25,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99588487] [2021-08-12 19:42:25,156 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 [2021-08-12 19:42:25,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:42:25,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:25,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:42:25,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:25,473 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:25,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99588487] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:25,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:25,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 19:42:25,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469844319] [2021-08-12 19:42:25,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:42:25,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:25,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:42:25,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:42:25,475 INFO L87 Difference]: Start difference. First operand 781 states and 3869 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:25,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:25,923 INFO L93 Difference]: Finished difference Result 871 states and 4148 transitions. [2021-08-12 19:42:25,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:42:25,923 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 [2021-08-12 19:42:25,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:25,927 INFO L225 Difference]: With dead ends: 871 [2021-08-12 19:42:25,927 INFO L226 Difference]: Without dead ends: 864 [2021-08-12 19:42:25,928 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 469.9ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:42:25,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2021-08-12 19:42:25,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 789. [2021-08-12 19:42:25,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 788 states have (on average 4.963197969543147) internal successors, (3911), 788 states have internal predecessors, (3911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:25,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 3911 transitions. [2021-08-12 19:42:25,971 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 3911 transitions. Word has length 22 [2021-08-12 19:42:25,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:25,972 INFO L482 AbstractCegarLoop]: Abstraction has 789 states and 3911 transitions. [2021-08-12 19:42:25,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:25,972 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 3911 transitions. [2021-08-12 19:42:25,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-12 19:42:25,973 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:25,973 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:26,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-08-12 19:42:26,189 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:26,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:26,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1681233933, now seen corresponding path program 12 times [2021-08-12 19:42:26,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:26,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143724455] [2021-08-12 19:42:26,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:26,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:26,296 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:26,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:26,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143724455] [2021-08-12 19:42:26,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143724455] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:26,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361294858] [2021-08-12 19:42:26,297 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 [2021-08-12 19:42:26,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 19:42:26,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:26,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:42:26,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:26,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-12 19:42:26,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:26,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:42:26,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:42:26,535 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-08-12 19:42:26,589 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:26,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361294858] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:26,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:26,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-12 19:42:26,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544110423] [2021-08-12 19:42:26,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:42:26,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:26,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:42:26,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:42:26,591 INFO L87 Difference]: Start difference. First operand 789 states and 3911 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:26,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:26,969 INFO L93 Difference]: Finished difference Result 1391 states and 6466 transitions. [2021-08-12 19:42:26,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:42:26,969 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 [2021-08-12 19:42:26,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:26,974 INFO L225 Difference]: With dead ends: 1391 [2021-08-12 19:42:26,974 INFO L226 Difference]: Without dead ends: 1162 [2021-08-12 19:42:26,974 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 374.2ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:42:26,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2021-08-12 19:42:27,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 809. [2021-08-12 19:42:27,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 4.951732673267327) internal successors, (4001), 808 states have internal predecessors, (4001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:27,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 4001 transitions. [2021-08-12 19:42:27,023 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 4001 transitions. Word has length 22 [2021-08-12 19:42:27,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:27,023 INFO L482 AbstractCegarLoop]: Abstraction has 809 states and 4001 transitions. [2021-08-12 19:42:27,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:27,024 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 4001 transitions. [2021-08-12 19:42:27,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-12 19:42:27,025 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:27,025 INFO L550 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:27,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-12 19:42:27,241 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:27,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:27,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1253616623, now seen corresponding path program 13 times [2021-08-12 19:42:27,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:27,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464834610] [2021-08-12 19:42:27,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:27,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:27,339 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:27,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:27,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464834610] [2021-08-12 19:42:27,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464834610] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:27,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792527491] [2021-08-12 19:42:27,340 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 [2021-08-12 19:42:27,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:27,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:42:27,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:27,528 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 [2021-08-12 19:42:27,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:27,532 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 [2021-08-12 19:42:27,533 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:27,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:42:27,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 19:42:27,559 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:91, output treesize:77 [2021-08-12 19:42:27,628 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:42:27,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792527491] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:27,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:27,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2021-08-12 19:42:27,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984669271] [2021-08-12 19:42:27,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:42:27,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:27,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:42:27,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:42:27,629 INFO L87 Difference]: Start difference. First operand 809 states and 4001 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:27,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:27,830 INFO L93 Difference]: Finished difference Result 1148 states and 5323 transitions. [2021-08-12 19:42:27,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:42:27,831 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 [2021-08-12 19:42:27,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:27,835 INFO L225 Difference]: With dead ends: 1148 [2021-08-12 19:42:27,835 INFO L226 Difference]: Without dead ends: 943 [2021-08-12 19:42:27,835 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 229.6ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:42:27,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-08-12 19:42:27,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 817. [2021-08-12 19:42:27,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 816 states have (on average 4.922794117647059) internal successors, (4017), 816 states have internal predecessors, (4017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:27,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 4017 transitions. [2021-08-12 19:42:27,882 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 4017 transitions. Word has length 22 [2021-08-12 19:42:27,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:27,882 INFO L482 AbstractCegarLoop]: Abstraction has 817 states and 4017 transitions. [2021-08-12 19:42:27,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:27,883 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 4017 transitions. [2021-08-12 19:42:27,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-12 19:42:27,884 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:27,884 INFO L550 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:28,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:28,093 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:28,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:28,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1547176399, now seen corresponding path program 14 times [2021-08-12 19:42:28,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:28,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963835169] [2021-08-12 19:42:28,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:28,200 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:28,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:28,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963835169] [2021-08-12 19:42:28,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963835169] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:28,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809268871] [2021-08-12 19:42:28,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:42:28,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:42:28,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:28,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 19:42:28,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:28,376 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:28,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809268871] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:28,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:28,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 19:42:28,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171964181] [2021-08-12 19:42:28,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:42:28,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:28,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:42:28,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:42:28,377 INFO L87 Difference]: Start difference. First operand 817 states and 4017 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:28,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:28,740 INFO L93 Difference]: Finished difference Result 1068 states and 4880 transitions. [2021-08-12 19:42:28,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:42:28,741 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 [2021-08-12 19:42:28,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:28,744 INFO L225 Difference]: With dead ends: 1068 [2021-08-12 19:42:28,744 INFO L226 Difference]: Without dead ends: 1039 [2021-08-12 19:42:28,745 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 287.3ms TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:42:28,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2021-08-12 19:42:28,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 837. [2021-08-12 19:42:28,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 4.927033492822966) internal successors, (4119), 836 states have internal predecessors, (4119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:28,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 4119 transitions. [2021-08-12 19:42:28,792 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 4119 transitions. Word has length 22 [2021-08-12 19:42:28,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:28,792 INFO L482 AbstractCegarLoop]: Abstraction has 837 states and 4119 transitions. [2021-08-12 19:42:28,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:28,792 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 4119 transitions. [2021-08-12 19:42:28,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-12 19:42:28,794 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:28,794 INFO L550 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:29,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-08-12 19:42:29,009 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:29,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:29,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1104277259, now seen corresponding path program 15 times [2021-08-12 19:42:29,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:29,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529659714] [2021-08-12 19:42:29,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:29,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:29,094 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:29,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:29,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529659714] [2021-08-12 19:42:29,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529659714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:29,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103069225] [2021-08-12 19:42:29,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:42:29,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:42:29,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:29,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 19:42:29,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:29,284 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:29,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103069225] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:29,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:29,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 19:42:29,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691862498] [2021-08-12 19:42:29,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:42:29,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:29,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:42:29,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:42:29,285 INFO L87 Difference]: Start difference. First operand 837 states and 4119 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:29,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:29,518 INFO L93 Difference]: Finished difference Result 898 states and 4310 transitions. [2021-08-12 19:42:29,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:42:29,518 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 [2021-08-12 19:42:29,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:29,521 INFO L225 Difference]: With dead ends: 898 [2021-08-12 19:42:29,521 INFO L226 Difference]: Without dead ends: 891 [2021-08-12 19:42:29,522 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 211.4ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:42:29,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-08-12 19:42:29,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 842. [2021-08-12 19:42:29,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 4.915576694411415) internal successors, (4134), 841 states have internal predecessors, (4134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:29,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 4134 transitions. [2021-08-12 19:42:29,569 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 4134 transitions. Word has length 22 [2021-08-12 19:42:29,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:29,569 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 4134 transitions. [2021-08-12 19:42:29,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:29,569 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 4134 transitions. [2021-08-12 19:42:29,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-12 19:42:29,571 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:29,571 INFO L550 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:29,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:29,787 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:29,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:29,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1885658193, now seen corresponding path program 2 times [2021-08-12 19:42:29,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:29,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451562974] [2021-08-12 19:42:29,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:29,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:29,908 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:29,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:29,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451562974] [2021-08-12 19:42:29,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451562974] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:29,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222641228] [2021-08-12 19:42:29,908 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 [2021-08-12 19:42:29,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:42:29,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:29,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 19:42:29,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:30,248 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 [2021-08-12 19:42:30,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:30,289 INFO L628 ElimStorePlain]: treesize reduction 7, result has 90.1 percent of original size [2021-08-12 19:42:30,299 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 [2021-08-12 19:42:30,300 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:30,316 INFO L628 ElimStorePlain]: treesize reduction 33, result has 42.1 percent of original size [2021-08-12 19:42:30,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:42:30,317 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:78, output treesize:24 [2021-08-12 19:42:30,348 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:30,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222641228] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:30,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:30,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 19:42:30,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807676037] [2021-08-12 19:42:30,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:42:30,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:30,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:42:30,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:42:30,349 INFO L87 Difference]: Start difference. First operand 842 states and 4134 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:30,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:30,767 INFO L93 Difference]: Finished difference Result 949 states and 4451 transitions. [2021-08-12 19:42:30,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:42:30,769 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 [2021-08-12 19:42:30,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:30,772 INFO L225 Difference]: With dead ends: 949 [2021-08-12 19:42:30,772 INFO L226 Difference]: Without dead ends: 930 [2021-08-12 19:42:30,772 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 513.9ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:42:30,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-08-12 19:42:30,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 847. [2021-08-12 19:42:30,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 4.914893617021277) internal successors, (4158), 846 states have internal predecessors, (4158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:30,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 4158 transitions. [2021-08-12 19:42:30,819 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 4158 transitions. Word has length 22 [2021-08-12 19:42:30,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:30,819 INFO L482 AbstractCegarLoop]: Abstraction has 847 states and 4158 transitions. [2021-08-12 19:42:30,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:30,819 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 4158 transitions. [2021-08-12 19:42:30,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-12 19:42:30,821 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:30,821 INFO L550 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:31,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:31,026 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:31,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:31,026 INFO L82 PathProgramCache]: Analyzing trace with hash -671870473, now seen corresponding path program 3 times [2021-08-12 19:42:31,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:31,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607753300] [2021-08-12 19:42:31,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:31,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:31,071 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:42:31,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:31,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607753300] [2021-08-12 19:42:31,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607753300] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:31,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888667697] [2021-08-12 19:42:31,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:31,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 19:42:31,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:31,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:42:31,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:31,193 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 [2021-08-12 19:42:31,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:31,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:42:31,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:42:31,198 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:10 [2021-08-12 19:42:31,219 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:42:31,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888667697] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:31,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:31,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-12 19:42:31,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968163819] [2021-08-12 19:42:31,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:42:31,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:31,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:42:31,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:42:31,220 INFO L87 Difference]: Start difference. First operand 847 states and 4158 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:31,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:31,567 INFO L93 Difference]: Finished difference Result 1382 states and 6252 transitions. [2021-08-12 19:42:31,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:42:31,567 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 [2021-08-12 19:42:31,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:31,572 INFO L225 Difference]: With dead ends: 1382 [2021-08-12 19:42:31,572 INFO L226 Difference]: Without dead ends: 1371 [2021-08-12 19:42:31,572 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 169.8ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:42:31,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2021-08-12 19:42:31,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 902. [2021-08-12 19:42:31,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 4.988901220865705) internal successors, (4495), 901 states have internal predecessors, (4495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:31,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 4495 transitions. [2021-08-12 19:42:31,628 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 4495 transitions. Word has length 22 [2021-08-12 19:42:31,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:31,628 INFO L482 AbstractCegarLoop]: Abstraction has 902 states and 4495 transitions. [2021-08-12 19:42:31,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:31,628 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 4495 transitions. [2021-08-12 19:42:31,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-12 19:42:31,630 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:31,630 INFO L550 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:31,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-08-12 19:42:31,845 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:31,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:31,845 INFO L82 PathProgramCache]: Analyzing trace with hash 965997621, now seen corresponding path program 4 times [2021-08-12 19:42:31,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:31,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086255296] [2021-08-12 19:42:31,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:31,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:31,933 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:31,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:31,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086255296] [2021-08-12 19:42:31,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086255296] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:31,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162384492] [2021-08-12 19:42:31,934 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 [2021-08-12 19:42:31,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:42:31,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:31,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 19:42:31,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:32,268 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:32,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162384492] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:32,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:32,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-12 19:42:32,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075021347] [2021-08-12 19:42:32,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:42:32,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:32,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:42:32,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:42:32,269 INFO L87 Difference]: Start difference. First operand 902 states and 4495 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:32,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:32,673 INFO L93 Difference]: Finished difference Result 1018 states and 4930 transitions. [2021-08-12 19:42:32,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 19:42:32,673 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 [2021-08-12 19:42:32,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:32,676 INFO L225 Difference]: With dead ends: 1018 [2021-08-12 19:42:32,676 INFO L226 Difference]: Without dead ends: 927 [2021-08-12 19:42:32,677 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 522.1ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:42:32,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-08-12 19:42:32,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 909. [2021-08-12 19:42:32,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 908 states have (on average 4.973568281938326) internal successors, (4516), 908 states have internal predecessors, (4516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:32,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 4516 transitions. [2021-08-12 19:42:32,743 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 4516 transitions. Word has length 22 [2021-08-12 19:42:32,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:32,743 INFO L482 AbstractCegarLoop]: Abstraction has 909 states and 4516 transitions. [2021-08-12 19:42:32,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:32,743 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 4516 transitions. [2021-08-12 19:42:32,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-12 19:42:32,744 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:32,745 INFO L550 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:32,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:32,960 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:32,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:32,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1818617425, now seen corresponding path program 5 times [2021-08-12 19:42:32,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:32,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106088095] [2021-08-12 19:42:32,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:32,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:33,109 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:33,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:33,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106088095] [2021-08-12 19:42:33,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106088095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:33,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478561532] [2021-08-12 19:42:33,110 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 [2021-08-12 19:42:33,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 19:42:33,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:33,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 19:42:33,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:33,468 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:33,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478561532] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:33,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:33,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-08-12 19:42:33,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855759541] [2021-08-12 19:42:33,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:42:33,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:33,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:42:33,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:42:33,469 INFO L87 Difference]: Start difference. First operand 909 states and 4516 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:33,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:33,928 INFO L93 Difference]: Finished difference Result 1025 states and 4941 transitions. [2021-08-12 19:42:33,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:42:33,928 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 [2021-08-12 19:42:33,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:33,931 INFO L225 Difference]: With dead ends: 1025 [2021-08-12 19:42:33,931 INFO L226 Difference]: Without dead ends: 934 [2021-08-12 19:42:33,932 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 636.4ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:42:33,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2021-08-12 19:42:33,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 907. [2021-08-12 19:42:33,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 4.970198675496689) internal successors, (4503), 906 states have internal predecessors, (4503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:33,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 4503 transitions. [2021-08-12 19:42:33,984 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 4503 transitions. Word has length 22 [2021-08-12 19:42:33,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:33,985 INFO L482 AbstractCegarLoop]: Abstraction has 907 states and 4503 transitions. [2021-08-12 19:42:33,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:33,985 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 4503 transitions. [2021-08-12 19:42:33,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-12 19:42:33,986 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:33,986 INFO L550 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:34,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-08-12 19:42:34,187 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:34,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:34,187 INFO L82 PathProgramCache]: Analyzing trace with hash 541686385, now seen corresponding path program 6 times [2021-08-12 19:42:34,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:34,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420988518] [2021-08-12 19:42:34,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:34,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:34,268 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:34,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:34,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420988518] [2021-08-12 19:42:34,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420988518] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:34,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916621659] [2021-08-12 19:42:34,269 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 [2021-08-12 19:42:34,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:42:34,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:34,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 19:42:34,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:34,692 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:34,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916621659] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:34,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:34,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-12 19:42:34,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941572424] [2021-08-12 19:42:34,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:42:34,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:34,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:42:34,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:42:34,693 INFO L87 Difference]: Start difference. First operand 907 states and 4503 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:35,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:35,017 INFO L93 Difference]: Finished difference Result 1036 states and 5012 transitions. [2021-08-12 19:42:35,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:42:35,018 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 [2021-08-12 19:42:35,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:35,021 INFO L225 Difference]: With dead ends: 1036 [2021-08-12 19:42:35,021 INFO L226 Difference]: Without dead ends: 928 [2021-08-12 19:42:35,021 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 446.0ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:42:35,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2021-08-12 19:42:35,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 908. [2021-08-12 19:42:35,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 907 states have (on average 4.965821389195149) internal successors, (4504), 907 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:35,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 4504 transitions. [2021-08-12 19:42:35,077 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 4504 transitions. Word has length 22 [2021-08-12 19:42:35,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:35,077 INFO L482 AbstractCegarLoop]: Abstraction has 908 states and 4504 transitions. [2021-08-12 19:42:35,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:35,077 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 4504 transitions. [2021-08-12 19:42:35,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 19:42:35,079 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:35,079 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:35,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:35,296 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:35,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:35,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1519096036, now seen corresponding path program 7 times [2021-08-12 19:42:35,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:35,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568652837] [2021-08-12 19:42:35,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:35,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:35,390 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:35,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:35,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568652837] [2021-08-12 19:42:35,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568652837] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:35,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820566497] [2021-08-12 19:42:35,390 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 [2021-08-12 19:42:35,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:35,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:42:35,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:35,738 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:35,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820566497] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:35,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:35,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-08-12 19:42:35,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131634289] [2021-08-12 19:42:35,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:42:35,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:35,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:42:35,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:42:35,739 INFO L87 Difference]: Start difference. First operand 908 states and 4504 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:36,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:36,058 INFO L93 Difference]: Finished difference Result 1249 states and 6114 transitions. [2021-08-12 19:42:36,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:42:36,059 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 [2021-08-12 19:42:36,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:36,062 INFO L225 Difference]: With dead ends: 1249 [2021-08-12 19:42:36,062 INFO L226 Difference]: Without dead ends: 950 [2021-08-12 19:42:36,063 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 379.8ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:42:36,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2021-08-12 19:42:36,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 906. [2021-08-12 19:42:36,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 4.942541436464088) internal successors, (4473), 905 states have internal predecessors, (4473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:36,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 4473 transitions. [2021-08-12 19:42:36,118 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 4473 transitions. Word has length 23 [2021-08-12 19:42:36,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:36,118 INFO L482 AbstractCegarLoop]: Abstraction has 906 states and 4473 transitions. [2021-08-12 19:42:36,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:36,118 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 4473 transitions. [2021-08-12 19:42:36,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 19:42:36,120 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:36,120 INFO L550 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:36,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-08-12 19:42:36,320 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:36,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:36,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1855571384, now seen corresponding path program 16 times [2021-08-12 19:42:36,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:36,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848658218] [2021-08-12 19:42:36,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:36,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:36,420 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:36,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:36,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848658218] [2021-08-12 19:42:36,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848658218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:36,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187279641] [2021-08-12 19:42:36,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:42:36,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:42:36,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:36,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:42:36,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:36,621 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 [2021-08-12 19:42:36,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:36,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-12 19:42:36,627 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:36,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:42:36,659 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. [2021-08-12 19:42:36,659 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-08-12 19:42:36,752 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:36,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187279641] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:36,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:36,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-12 19:42:36,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280568304] [2021-08-12 19:42:36,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:42:36,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:36,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:42:36,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:42:36,753 INFO L87 Difference]: Start difference. First operand 906 states and 4473 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:36,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:36,993 INFO L93 Difference]: Finished difference Result 1447 states and 6592 transitions. [2021-08-12 19:42:36,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:42:36,994 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 [2021-08-12 19:42:36,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:36,997 INFO L225 Difference]: With dead ends: 1447 [2021-08-12 19:42:36,998 INFO L226 Difference]: Without dead ends: 1071 [2021-08-12 19:42:36,998 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 256.9ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:42:36,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2021-08-12 19:42:37,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 772. [2021-08-12 19:42:37,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 4.752269779507134) internal successors, (3664), 771 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:37,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 3664 transitions. [2021-08-12 19:42:37,069 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 3664 transitions. Word has length 23 [2021-08-12 19:42:37,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:37,069 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 3664 transitions. [2021-08-12 19:42:37,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:37,069 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 3664 transitions. [2021-08-12 19:42:37,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 19:42:37,071 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:37,071 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:37,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:37,277 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:37,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:37,277 INFO L82 PathProgramCache]: Analyzing trace with hash -2015886678, now seen corresponding path program 17 times [2021-08-12 19:42:37,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:37,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003545119] [2021-08-12 19:42:37,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:37,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:37,356 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:37,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:37,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003545119] [2021-08-12 19:42:37,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003545119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:37,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231613446] [2021-08-12 19:42:37,357 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:37,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 19:42:37,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:37,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 19:42:37,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:37,645 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:37,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231613446] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:37,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:37,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-08-12 19:42:37,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340831160] [2021-08-12 19:42:37,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:42:37,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:37,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:42:37,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:42:37,646 INFO L87 Difference]: Start difference. First operand 772 states and 3664 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:37,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:37,858 INFO L93 Difference]: Finished difference Result 1000 states and 4580 transitions. [2021-08-12 19:42:37,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:42:37,869 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 [2021-08-12 19:42:37,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:37,872 INFO L225 Difference]: With dead ends: 1000 [2021-08-12 19:42:37,872 INFO L226 Difference]: Without dead ends: 827 [2021-08-12 19:42:37,873 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 238.1ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:42:37,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-08-12 19:42:37,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 774. [2021-08-12 19:42:37,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 4.745148771021992) internal successors, (3668), 773 states have internal predecessors, (3668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:37,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 3668 transitions. [2021-08-12 19:42:37,924 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 3668 transitions. Word has length 23 [2021-08-12 19:42:37,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:37,924 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 3668 transitions. [2021-08-12 19:42:37,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:37,924 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 3668 transitions. [2021-08-12 19:42:37,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 19:42:37,926 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:37,926 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:38,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:38,141 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:38,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:38,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1854769382, now seen corresponding path program 18 times [2021-08-12 19:42:38,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:38,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581682993] [2021-08-12 19:42:38,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:38,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:38,238 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:38,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:38,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581682993] [2021-08-12 19:42:38,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581682993] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:38,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304981928] [2021-08-12 19:42:38,238 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:42:38,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:42:38,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:38,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 19:42:38,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:38,587 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:38,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304981928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:38,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:38,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-08-12 19:42:38,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441614537] [2021-08-12 19:42:38,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:42:38,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:38,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:42:38,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:42:38,588 INFO L87 Difference]: Start difference. First operand 774 states and 3668 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:38,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:38,858 INFO L93 Difference]: Finished difference Result 997 states and 4565 transitions. [2021-08-12 19:42:38,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:42:38,858 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 [2021-08-12 19:42:38,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:38,861 INFO L225 Difference]: With dead ends: 997 [2021-08-12 19:42:38,861 INFO L226 Difference]: Without dead ends: 828 [2021-08-12 19:42:38,862 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 310.8ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:42:38,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-08-12 19:42:38,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 776. [2021-08-12 19:42:38,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 4.736774193548387) internal successors, (3671), 775 states have internal predecessors, (3671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:38,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 3671 transitions. [2021-08-12 19:42:38,914 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 3671 transitions. Word has length 23 [2021-08-12 19:42:38,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:38,914 INFO L482 AbstractCegarLoop]: Abstraction has 776 states and 3671 transitions. [2021-08-12 19:42:38,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:38,914 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 3671 transitions. [2021-08-12 19:42:38,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 19:42:38,916 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:38,916 INFO L550 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:39,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:39,117 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:39,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:39,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1208762112, now seen corresponding path program 19 times [2021-08-12 19:42:39,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:39,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576035621] [2021-08-12 19:42:39,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:39,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:39,233 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:42:39,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:39,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576035621] [2021-08-12 19:42:39,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576035621] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:39,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483901422] [2021-08-12 19:42:39,234 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:39,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:39,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 19:42:39,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:39,558 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:42:39,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483901422] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:39,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:39,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-12 19:42:39,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195805363] [2021-08-12 19:42:39,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:42:39,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:39,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:42:39,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:42:39,559 INFO L87 Difference]: Start difference. First operand 776 states and 3671 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:39,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:39,874 INFO L93 Difference]: Finished difference Result 1147 states and 5173 transitions. [2021-08-12 19:42:39,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:42:39,874 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 19:42:39,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:39,878 INFO L225 Difference]: With dead ends: 1147 [2021-08-12 19:42:39,878 INFO L226 Difference]: Without dead ends: 923 [2021-08-12 19:42:39,878 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 384.6ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:42:39,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2021-08-12 19:42:39,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 773. [2021-08-12 19:42:39,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 4.699481865284974) internal successors, (3628), 772 states have internal predecessors, (3628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:39,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 3628 transitions. [2021-08-12 19:42:39,932 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 3628 transitions. Word has length 23 [2021-08-12 19:42:39,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:39,932 INFO L482 AbstractCegarLoop]: Abstraction has 773 states and 3628 transitions. [2021-08-12 19:42:39,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:39,933 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 3628 transitions. [2021-08-12 19:42:39,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 19:42:39,934 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:39,934 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:40,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:40,136 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:40,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:40,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1009797930, now seen corresponding path program 20 times [2021-08-12 19:42:40,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:40,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721293593] [2021-08-12 19:42:40,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:40,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:40,228 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:40,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:40,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721293593] [2021-08-12 19:42:40,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721293593] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:40,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100979663] [2021-08-12 19:42:40,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:40,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:42:40,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:40,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 19:42:40,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:40,638 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:40,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100979663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:40,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:40,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-08-12 19:42:40,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969224351] [2021-08-12 19:42:40,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:42:40,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:40,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:42:40,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:42:40,639 INFO L87 Difference]: Start difference. First operand 773 states and 3628 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:40,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:40,943 INFO L93 Difference]: Finished difference Result 995 states and 4542 transitions. [2021-08-12 19:42:40,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:42:40,944 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 [2021-08-12 19:42:40,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:40,947 INFO L225 Difference]: With dead ends: 995 [2021-08-12 19:42:40,947 INFO L226 Difference]: Without dead ends: 825 [2021-08-12 19:42:40,947 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 419.3ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:42:40,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-08-12 19:42:40,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 777. [2021-08-12 19:42:40,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 776 states have (on average 4.694587628865979) internal successors, (3643), 776 states have internal predecessors, (3643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:40,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 3643 transitions. [2021-08-12 19:42:41,001 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 3643 transitions. Word has length 23 [2021-08-12 19:42:41,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:41,001 INFO L482 AbstractCegarLoop]: Abstraction has 777 states and 3643 transitions. [2021-08-12 19:42:41,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:41,001 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 3643 transitions. [2021-08-12 19:42:41,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 19:42:41,003 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:41,003 INFO L550 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:41,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-08-12 19:42:41,217 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:41,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:41,217 INFO L82 PathProgramCache]: Analyzing trace with hash -2053733564, now seen corresponding path program 21 times [2021-08-12 19:42:41,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:41,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880819995] [2021-08-12 19:42:41,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:41,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:41,294 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:42:41,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:41,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880819995] [2021-08-12 19:42:41,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880819995] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:41,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083621222] [2021-08-12 19:42:41,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:41,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:42:41,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:41,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:42:41,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:41,448 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 [2021-08-12 19:42:41,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:41,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:42:41,456 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 [2021-08-12 19:42:41,457 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:41,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:42:41,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-08-12 19:42:41,462 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:28, output treesize:14 [2021-08-12 19:42:41,486 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:42:41,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083621222] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:41,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:41,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-08-12 19:42:41,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364197495] [2021-08-12 19:42:41,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:42:41,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:41,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:42:41,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:42:41,487 INFO L87 Difference]: Start difference. First operand 777 states and 3643 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:41,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:41,967 INFO L93 Difference]: Finished difference Result 1096 states and 4919 transitions. [2021-08-12 19:42:41,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:42:41,967 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 19:42:41,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:41,970 INFO L225 Difference]: With dead ends: 1096 [2021-08-12 19:42:41,970 INFO L226 Difference]: Without dead ends: 861 [2021-08-12 19:42:41,971 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 203.3ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:42:41,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2021-08-12 19:42:42,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 763. [2021-08-12 19:42:42,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 4.66010498687664) internal successors, (3551), 762 states have internal predecessors, (3551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:42,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 3551 transitions. [2021-08-12 19:42:42,026 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 3551 transitions. Word has length 23 [2021-08-12 19:42:42,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:42,026 INFO L482 AbstractCegarLoop]: Abstraction has 763 states and 3551 transitions. [2021-08-12 19:42:42,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:42,026 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 3551 transitions. [2021-08-12 19:42:42,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 19:42:42,027 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:42,027 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:42,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:42,229 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:42,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:42,229 INFO L82 PathProgramCache]: Analyzing trace with hash -50023488, now seen corresponding path program 7 times [2021-08-12 19:42:42,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:42,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630277073] [2021-08-12 19:42:42,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:42,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:42,303 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:42:42,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:42,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630277073] [2021-08-12 19:42:42,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630277073] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:42,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816570058] [2021-08-12 19:42:42,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-12 19:42:42,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:42,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:42:42,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:42,418 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 [2021-08-12 19:42:42,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:42,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-12 19:42:42,423 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:42,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:42:42,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-08-12 19:42:42,437 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:62, output treesize:48 [2021-08-12 19:42:42,525 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:42:42,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816570058] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:42,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:42,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-12 19:42:42,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357198018] [2021-08-12 19:42:42,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:42:42,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:42,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:42:42,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:42:42,526 INFO L87 Difference]: Start difference. First operand 763 states and 3551 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:43,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:43,141 INFO L93 Difference]: Finished difference Result 2711 states and 12277 transitions. [2021-08-12 19:42:43,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:42:43,142 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 19:42:43,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:43,148 INFO L225 Difference]: With dead ends: 2711 [2021-08-12 19:42:43,148 INFO L226 Difference]: Without dead ends: 2230 [2021-08-12 19:42:43,149 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 293.2ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:42:43,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2230 states. [2021-08-12 19:42:43,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2230 to 1262. [2021-08-12 19:42:43,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 4.92466296590008) internal successors, (6210), 1261 states have internal predecessors, (6210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:43,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 6210 transitions. [2021-08-12 19:42:43,239 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 6210 transitions. Word has length 23 [2021-08-12 19:42:43,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:43,239 INFO L482 AbstractCegarLoop]: Abstraction has 1262 states and 6210 transitions. [2021-08-12 19:42:43,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:43,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 6210 transitions. [2021-08-12 19:42:43,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 19:42:43,242 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:43,242 INFO L550 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:43,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:43,456 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:43,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:43,457 INFO L82 PathProgramCache]: Analyzing trace with hash -2123404862, now seen corresponding path program 8 times [2021-08-12 19:42:43,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:43,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521696775] [2021-08-12 19:42:43,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:43,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:43,566 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:43,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:43,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521696775] [2021-08-12 19:42:43,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521696775] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:43,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208083598] [2021-08-12 19:42:43,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:43,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:42:43,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:43,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 19:42:43,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:43,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-12 19:42:43,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:43,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:42:43,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:42:43,995 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-08-12 19:42:44,027 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:44,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208083598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:44,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:44,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:42:44,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053580295] [2021-08-12 19:42:44,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:42:44,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:44,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:42:44,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:42:44,028 INFO L87 Difference]: Start difference. First operand 1262 states and 6210 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:44,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:44,733 INFO L93 Difference]: Finished difference Result 1629 states and 7439 transitions. [2021-08-12 19:42:44,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:42:44,733 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 19:42:44,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:44,739 INFO L225 Difference]: With dead ends: 1629 [2021-08-12 19:42:44,739 INFO L226 Difference]: Without dead ends: 1589 [2021-08-12 19:42:44,739 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 640.8ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:42:44,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2021-08-12 19:42:44,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1292. [2021-08-12 19:42:44,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 4.918667699457784) internal successors, (6350), 1291 states have internal predecessors, (6350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:44,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 6350 transitions. [2021-08-12 19:42:44,829 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 6350 transitions. Word has length 23 [2021-08-12 19:42:44,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:44,829 INFO L482 AbstractCegarLoop]: Abstraction has 1292 states and 6350 transitions. [2021-08-12 19:42:44,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:44,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 6350 transitions. [2021-08-12 19:42:44,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 19:42:44,831 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:44,831 INFO L550 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:45,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-08-12 19:42:45,032 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:45,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:45,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1658839292, now seen corresponding path program 9 times [2021-08-12 19:42:45,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:45,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688322981] [2021-08-12 19:42:45,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:45,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:45,141 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:45,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:45,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688322981] [2021-08-12 19:42:45,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688322981] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:45,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755309586] [2021-08-12 19:42:45,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:45,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 19:42:45,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:45,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:42:45,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:45,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-12 19:42:45,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:45,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:42:45,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:42:45,403 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-08-12 19:42:45,434 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:45,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755309586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:45,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:45,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:42:45,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000131249] [2021-08-12 19:42:45,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:42:45,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:45,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:42:45,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:42:45,435 INFO L87 Difference]: Start difference. First operand 1292 states and 6350 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:46,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:46,128 INFO L93 Difference]: Finished difference Result 2366 states and 10669 transitions. [2021-08-12 19:42:46,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:42:46,129 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 19:42:46,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:46,135 INFO L225 Difference]: With dead ends: 2366 [2021-08-12 19:42:46,136 INFO L226 Difference]: Without dead ends: 2284 [2021-08-12 19:42:46,136 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 383.6ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:42:46,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2284 states. [2021-08-12 19:42:46,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2284 to 1465. [2021-08-12 19:42:46,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1464 states have (on average 5.044398907103825) internal successors, (7385), 1464 states have internal predecessors, (7385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:46,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 7385 transitions. [2021-08-12 19:42:46,239 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 7385 transitions. Word has length 23 [2021-08-12 19:42:46,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:46,239 INFO L482 AbstractCegarLoop]: Abstraction has 1465 states and 7385 transitions. [2021-08-12 19:42:46,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:46,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 7385 transitions. [2021-08-12 19:42:46,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 19:42:46,242 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:46,242 INFO L550 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:46,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-12 19:42:46,442 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:46,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:46,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1728663294, now seen corresponding path program 10 times [2021-08-12 19:42:46,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:46,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758087920] [2021-08-12 19:42:46,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:46,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:46,516 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:46,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:46,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758087920] [2021-08-12 19:42:46,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758087920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:46,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639402745] [2021-08-12 19:42:46,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:46,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:42:46,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:46,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:42:46,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:46,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-12 19:42:46,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:46,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:42:46,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:42:46,666 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2021-08-12 19:42:46,692 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:42:46,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639402745] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:46,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:46,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-08-12 19:42:46,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947708606] [2021-08-12 19:42:46,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:42:46,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:46,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:42:46,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:42:46,693 INFO L87 Difference]: Start difference. First operand 1465 states and 7385 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:47,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:47,299 INFO L93 Difference]: Finished difference Result 2054 states and 9702 transitions. [2021-08-12 19:42:47,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:42:47,299 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 19:42:47,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:47,306 INFO L225 Difference]: With dead ends: 2054 [2021-08-12 19:42:47,306 INFO L226 Difference]: Without dead ends: 2019 [2021-08-12 19:42:47,306 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 239.6ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:42:47,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2019 states. [2021-08-12 19:42:47,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2019 to 1508. [2021-08-12 19:42:47,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1508 states, 1507 states have (on average 5.078964830789649) internal successors, (7654), 1507 states have internal predecessors, (7654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:47,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1508 states to 1508 states and 7654 transitions. [2021-08-12 19:42:47,419 INFO L78 Accepts]: Start accepts. Automaton has 1508 states and 7654 transitions. Word has length 23 [2021-08-12 19:42:47,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:47,419 INFO L482 AbstractCegarLoop]: Abstraction has 1508 states and 7654 transitions. [2021-08-12 19:42:47,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:47,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1508 states and 7654 transitions. [2021-08-12 19:42:47,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 19:42:47,422 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:47,422 INFO L550 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:47,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-12 19:42:47,622 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:47,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:47,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1215940152, now seen corresponding path program 11 times [2021-08-12 19:42:47,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:47,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430225779] [2021-08-12 19:42:47,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:47,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:47,681 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:42:47,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:47,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430225779] [2021-08-12 19:42:47,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430225779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:47,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318001609] [2021-08-12 19:42:47,682 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:47,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 19:42:47,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:47,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 19:42:47,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:47,926 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:42:47,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318001609] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:47,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:47,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-12 19:42:47,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75555444] [2021-08-12 19:42:47,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:42:47,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:47,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:42:47,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:42:47,927 INFO L87 Difference]: Start difference. First operand 1508 states and 7654 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:48,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:48,526 INFO L93 Difference]: Finished difference Result 2205 states and 10359 transitions. [2021-08-12 19:42:48,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:42:48,527 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 19:42:48,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:48,533 INFO L225 Difference]: With dead ends: 2205 [2021-08-12 19:42:48,533 INFO L226 Difference]: Without dead ends: 2160 [2021-08-12 19:42:48,534 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 201.4ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:42:48,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2160 states. [2021-08-12 19:42:48,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2160 to 1464. [2021-08-12 19:42:48,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 1463 states have (on average 5.1066302118933695) internal successors, (7471), 1463 states have internal predecessors, (7471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:48,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 7471 transitions. [2021-08-12 19:42:48,636 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 7471 transitions. Word has length 23 [2021-08-12 19:42:48,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:48,636 INFO L482 AbstractCegarLoop]: Abstraction has 1464 states and 7471 transitions. [2021-08-12 19:42:48,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:48,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 7471 transitions. [2021-08-12 19:42:48,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 19:42:48,639 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:48,639 INFO L550 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:48,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:48,839 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:48,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:48,840 INFO L82 PathProgramCache]: Analyzing trace with hash 755994684, now seen corresponding path program 12 times [2021-08-12 19:42:48,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:48,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107084342] [2021-08-12 19:42:48,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:48,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:48,945 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:48,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:48,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107084342] [2021-08-12 19:42:48,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107084342] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:48,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50201893] [2021-08-12 19:42:48,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:48,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:42:48,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:48,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 19:42:48,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:49,321 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:49,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50201893] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:49,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:49,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:42:49,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880162498] [2021-08-12 19:42:49,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:42:49,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:49,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:42:49,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:42:49,322 INFO L87 Difference]: Start difference. First operand 1464 states and 7471 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:49,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:49,788 INFO L93 Difference]: Finished difference Result 1550 states and 7766 transitions. [2021-08-12 19:42:49,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:42:49,788 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 19:42:49,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:49,794 INFO L225 Difference]: With dead ends: 1550 [2021-08-12 19:42:49,794 INFO L226 Difference]: Without dead ends: 1536 [2021-08-12 19:42:49,794 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 454.4ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:42:49,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2021-08-12 19:42:49,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 1474. [2021-08-12 19:42:49,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1473 states have (on average 5.104548540393754) internal successors, (7519), 1473 states have internal predecessors, (7519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:49,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 7519 transitions. [2021-08-12 19:42:49,893 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 7519 transitions. Word has length 23 [2021-08-12 19:42:49,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:49,893 INFO L482 AbstractCegarLoop]: Abstraction has 1474 states and 7519 transitions. [2021-08-12 19:42:49,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:49,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 7519 transitions. [2021-08-12 19:42:49,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 19:42:49,896 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:49,896 INFO L550 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:50,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-08-12 19:42:50,097 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:50,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:50,097 INFO L82 PathProgramCache]: Analyzing trace with hash 75343520, now seen corresponding path program 13 times [2021-08-12 19:42:50,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:50,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508500062] [2021-08-12 19:42:50,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:50,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:50,223 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:50,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:50,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508500062] [2021-08-12 19:42:50,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508500062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:50,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411491099] [2021-08-12 19:42:50,223 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:50,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:50,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 19:42:50,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:50,596 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:50,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411491099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:50,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:50,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:42:50,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612618912] [2021-08-12 19:42:50,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:42:50,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:50,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:42:50,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:42:50,597 INFO L87 Difference]: Start difference. First operand 1474 states and 7519 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:51,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:51,096 INFO L93 Difference]: Finished difference Result 1548 states and 7731 transitions. [2021-08-12 19:42:51,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:42:51,097 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 19:42:51,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:51,102 INFO L225 Difference]: With dead ends: 1548 [2021-08-12 19:42:51,102 INFO L226 Difference]: Without dead ends: 1534 [2021-08-12 19:42:51,103 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 527.7ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:42:51,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1534 states. [2021-08-12 19:42:51,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1534 to 1473. [2021-08-12 19:42:51,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1473 states, 1472 states have (on average 5.102581521739131) internal successors, (7511), 1472 states have internal predecessors, (7511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:51,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 7511 transitions. [2021-08-12 19:42:51,205 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 7511 transitions. Word has length 23 [2021-08-12 19:42:51,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:51,205 INFO L482 AbstractCegarLoop]: Abstraction has 1473 states and 7511 transitions. [2021-08-12 19:42:51,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:51,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 7511 transitions. [2021-08-12 19:42:51,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 19:42:51,208 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:51,208 INFO L550 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:51,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-08-12 19:42:51,415 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:51,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:51,415 INFO L82 PathProgramCache]: Analyzing trace with hash 927963324, now seen corresponding path program 14 times [2021-08-12 19:42:51,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:51,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842570853] [2021-08-12 19:42:51,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:51,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:51,526 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:51,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:51,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842570853] [2021-08-12 19:42:51,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842570853] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:51,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938725410] [2021-08-12 19:42:51,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:51,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:42:51,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:51,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:42:51,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:51,809 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:51,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938725410] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:51,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:51,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:42:51,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895635360] [2021-08-12 19:42:51,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:42:51,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:51,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:42:51,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:42:51,810 INFO L87 Difference]: Start difference. First operand 1473 states and 7511 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:52,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:52,198 INFO L93 Difference]: Finished difference Result 1595 states and 7903 transitions. [2021-08-12 19:42:52,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:42:52,198 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 19:42:52,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:52,204 INFO L225 Difference]: With dead ends: 1595 [2021-08-12 19:42:52,204 INFO L226 Difference]: Without dead ends: 1586 [2021-08-12 19:42:52,204 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 303.7ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:42:52,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2021-08-12 19:42:52,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 1485. [2021-08-12 19:42:52,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1484 states have (on average 5.092991913746631) internal successors, (7558), 1484 states have internal predecessors, (7558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:52,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 7558 transitions. [2021-08-12 19:42:52,322 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 7558 transitions. Word has length 23 [2021-08-12 19:42:52,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:52,322 INFO L482 AbstractCegarLoop]: Abstraction has 1485 states and 7558 transitions. [2021-08-12 19:42:52,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:52,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 7558 transitions. [2021-08-12 19:42:52,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 19:42:52,325 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:52,325 INFO L550 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:52,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:52,529 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:52,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:52,529 INFO L82 PathProgramCache]: Analyzing trace with hash -935773730, now seen corresponding path program 15 times [2021-08-12 19:42:52,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:52,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118154678] [2021-08-12 19:42:52,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:52,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:52,627 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:52,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:52,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118154678] [2021-08-12 19:42:52,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118154678] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:52,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127172408] [2021-08-12 19:42:52,628 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:52,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 19:42:52,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:52,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 19:42:52,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:52,894 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:52,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127172408] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:52,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:52,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:42:52,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478069046] [2021-08-12 19:42:52,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:42:52,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:52,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:42:52,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:42:52,895 INFO L87 Difference]: Start difference. First operand 1485 states and 7558 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:53,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:53,250 INFO L93 Difference]: Finished difference Result 1524 states and 7684 transitions. [2021-08-12 19:42:53,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:42:53,250 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 19:42:53,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:53,256 INFO L225 Difference]: With dead ends: 1524 [2021-08-12 19:42:53,256 INFO L226 Difference]: Without dead ends: 1517 [2021-08-12 19:42:53,256 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 310.1ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:42:53,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2021-08-12 19:42:53,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 1487. [2021-08-12 19:42:53,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 5.088156123822342) internal successors, (7561), 1486 states have internal predecessors, (7561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:53,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 7561 transitions. [2021-08-12 19:42:53,379 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 7561 transitions. Word has length 23 [2021-08-12 19:42:53,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:53,379 INFO L482 AbstractCegarLoop]: Abstraction has 1487 states and 7561 transitions. [2021-08-12 19:42:53,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:53,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 7561 transitions. [2021-08-12 19:42:53,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 19:42:53,382 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:53,382 INFO L550 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:53,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-08-12 19:42:53,582 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:53,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:53,583 INFO L82 PathProgramCache]: Analyzing trace with hash 503652088, now seen corresponding path program 16 times [2021-08-12 19:42:53,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:53,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191495831] [2021-08-12 19:42:53,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:53,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:53,703 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:53,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:53,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191495831] [2021-08-12 19:42:53,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191495831] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:53,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258751370] [2021-08-12 19:42:53,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:53,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:42:53,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:53,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 19:42:53,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:54,054 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:54,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258751370] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:54,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:54,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:42:54,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323389978] [2021-08-12 19:42:54,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:42:54,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:54,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:42:54,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:42:54,055 INFO L87 Difference]: Start difference. First operand 1487 states and 7561 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:54,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:54,500 INFO L93 Difference]: Finished difference Result 1544 states and 7725 transitions. [2021-08-12 19:42:54,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:42:54,500 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 19:42:54,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:54,506 INFO L225 Difference]: With dead ends: 1544 [2021-08-12 19:42:54,506 INFO L226 Difference]: Without dead ends: 1535 [2021-08-12 19:42:54,506 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 462.1ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:42:54,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2021-08-12 19:42:54,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1487. [2021-08-12 19:42:54,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 5.090847913862719) internal successors, (7565), 1486 states have internal predecessors, (7565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:54,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 7565 transitions. [2021-08-12 19:42:54,630 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 7565 transitions. Word has length 23 [2021-08-12 19:42:54,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:54,630 INFO L482 AbstractCegarLoop]: Abstraction has 1487 states and 7565 transitions. [2021-08-12 19:42:54,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:54,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 7565 transitions. [2021-08-12 19:42:54,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 19:42:54,633 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:54,633 INFO L550 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:54,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-08-12 19:42:54,834 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:54,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:54,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1831271002, now seen corresponding path program 17 times [2021-08-12 19:42:54,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:54,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229359809] [2021-08-12 19:42:54,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:54,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:54,991 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:54,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:54,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229359809] [2021-08-12 19:42:54,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229359809] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:54,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601170408] [2021-08-12 19:42:54,991 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:55,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 19:42:55,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:55,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:42:55,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:55,244 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 [2021-08-12 19:42:55,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:55,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:42:55,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:42:55,251 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-08-12 19:42:55,288 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:55,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601170408] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:55,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:55,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:42:55,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543165720] [2021-08-12 19:42:55,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:42:55,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:55,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:42:55,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:42:55,289 INFO L87 Difference]: Start difference. First operand 1487 states and 7565 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:55,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:55,961 INFO L93 Difference]: Finished difference Result 2084 states and 9861 transitions. [2021-08-12 19:42:55,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:42:55,961 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 19:42:55,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:55,967 INFO L225 Difference]: With dead ends: 2084 [2021-08-12 19:42:55,967 INFO L226 Difference]: Without dead ends: 2041 [2021-08-12 19:42:55,967 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 370.8ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:42:55,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2041 states. [2021-08-12 19:42:56,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2041 to 1495. [2021-08-12 19:42:56,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1494 states have (on average 5.153279785809906) internal successors, (7699), 1494 states have internal predecessors, (7699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:56,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 7699 transitions. [2021-08-12 19:42:56,074 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 7699 transitions. Word has length 23 [2021-08-12 19:42:56,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:56,074 INFO L482 AbstractCegarLoop]: Abstraction has 1495 states and 7699 transitions. [2021-08-12 19:42:56,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:56,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 7699 transitions. [2021-08-12 19:42:56,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 19:42:56,077 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:56,077 INFO L550 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:56,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-08-12 19:42:56,278 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:56,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:56,278 INFO L82 PathProgramCache]: Analyzing trace with hash 487248256, now seen corresponding path program 18 times [2021-08-12 19:42:56,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:56,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16843821] [2021-08-12 19:42:56,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:56,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:56,429 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:56,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:56,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16843821] [2021-08-12 19:42:56,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16843821] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:56,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35412921] [2021-08-12 19:42:56,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:56,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:42:56,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:56,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 19:42:56,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:56,829 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:56,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35412921] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:56,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:56,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:42:56,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246366451] [2021-08-12 19:42:56,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:42:56,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:56,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:42:56,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:42:56,830 INFO L87 Difference]: Start difference. First operand 1495 states and 7699 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:57,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:57,514 INFO L93 Difference]: Finished difference Result 2490 states and 12139 transitions. [2021-08-12 19:42:57,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:42:57,515 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 19:42:57,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:57,521 INFO L225 Difference]: With dead ends: 2490 [2021-08-12 19:42:57,521 INFO L226 Difference]: Without dead ends: 1829 [2021-08-12 19:42:57,523 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 613.2ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:42:57,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1829 states. [2021-08-12 19:42:57,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1829 to 1491. [2021-08-12 19:42:57,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1491 states, 1490 states have (on average 5.063758389261745) internal successors, (7545), 1490 states have internal predecessors, (7545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:57,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1491 states to 1491 states and 7545 transitions. [2021-08-12 19:42:57,635 INFO L78 Accepts]: Start accepts. Automaton has 1491 states and 7545 transitions. Word has length 23 [2021-08-12 19:42:57,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:57,635 INFO L482 AbstractCegarLoop]: Abstraction has 1491 states and 7545 transitions. [2021-08-12 19:42:57,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:57,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1491 states and 7545 transitions. [2021-08-12 19:42:57,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 19:42:57,638 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:57,638 INFO L550 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:57,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-08-12 19:42:57,839 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:57,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:57,839 INFO L82 PathProgramCache]: Analyzing trace with hash -193402908, now seen corresponding path program 19 times [2021-08-12 19:42:57,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:57,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197665773] [2021-08-12 19:42:57,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:57,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:57,934 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:57,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:57,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197665773] [2021-08-12 19:42:57,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197665773] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:57,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533751707] [2021-08-12 19:42:57,935 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:57,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:57,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 19:42:57,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:58,302 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:58,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533751707] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:58,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:58,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:42:58,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644952685] [2021-08-12 19:42:58,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:42:58,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:58,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:42:58,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:42:58,303 INFO L87 Difference]: Start difference. First operand 1491 states and 7545 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:58,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:58,763 INFO L93 Difference]: Finished difference Result 1564 states and 7792 transitions. [2021-08-12 19:42:58,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:42:58,764 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 19:42:58,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:58,770 INFO L225 Difference]: With dead ends: 1564 [2021-08-12 19:42:58,770 INFO L226 Difference]: Without dead ends: 1557 [2021-08-12 19:42:58,771 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 436.2ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:42:58,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1557 states. [2021-08-12 19:42:58,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1557 to 1498. [2021-08-12 19:42:58,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1498 states, 1497 states have (on average 5.055444221776887) internal successors, (7568), 1497 states have internal predecessors, (7568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:58,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1498 states to 1498 states and 7568 transitions. [2021-08-12 19:42:58,879 INFO L78 Accepts]: Start accepts. Automaton has 1498 states and 7568 transitions. Word has length 23 [2021-08-12 19:42:58,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:58,879 INFO L482 AbstractCegarLoop]: Abstraction has 1498 states and 7568 transitions. [2021-08-12 19:42:58,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:58,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1498 states and 7568 transitions. [2021-08-12 19:42:58,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 19:42:58,882 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:58,882 INFO L550 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:59,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:59,083 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:59,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:59,083 INFO L82 PathProgramCache]: Analyzing trace with hash 659216896, now seen corresponding path program 20 times [2021-08-12 19:42:59,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:59,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046544603] [2021-08-12 19:42:59,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:59,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:59,195 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:59,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:59,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046544603] [2021-08-12 19:42:59,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046544603] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:59,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978509598] [2021-08-12 19:42:59,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:59,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:42:59,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:59,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 19:42:59,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:59,481 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:59,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978509598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:59,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:59,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:42:59,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888507078] [2021-08-12 19:42:59,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:42:59,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:59,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:42:59,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:42:59,482 INFO L87 Difference]: Start difference. First operand 1498 states and 7568 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:00,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:00,071 INFO L93 Difference]: Finished difference Result 1614 states and 7979 transitions. [2021-08-12 19:43:00,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:43:00,072 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 19:43:00,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:00,077 INFO L225 Difference]: With dead ends: 1614 [2021-08-12 19:43:00,077 INFO L226 Difference]: Without dead ends: 1607 [2021-08-12 19:43:00,077 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 482.1ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:43:00,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2021-08-12 19:43:00,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1494. [2021-08-12 19:43:00,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 5.058271935699933) internal successors, (7552), 1493 states have internal predecessors, (7552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:00,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 7552 transitions. [2021-08-12 19:43:00,184 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 7552 transitions. Word has length 23 [2021-08-12 19:43:00,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:00,184 INFO L482 AbstractCegarLoop]: Abstraction has 1494 states and 7552 transitions. [2021-08-12 19:43:00,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:00,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 7552 transitions. [2021-08-12 19:43:00,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 19:43:00,187 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:00,187 INFO L550 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:00,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-08-12 19:43:00,393 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:00,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:00,393 INFO L82 PathProgramCache]: Analyzing trace with hash -617714144, now seen corresponding path program 21 times [2021-08-12 19:43:00,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:00,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708600996] [2021-08-12 19:43:00,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:00,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:00,527 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:00,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:00,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708600996] [2021-08-12 19:43:00,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708600996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:00,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104640796] [2021-08-12 19:43:00,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:00,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:43:00,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:43:00,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 19:43:00,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:01,019 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:01,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104640796] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:01,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:01,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:43:01,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125761140] [2021-08-12 19:43:01,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:43:01,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:01,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:43:01,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:43:01,020 INFO L87 Difference]: Start difference. First operand 1494 states and 7552 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:01,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:01,510 INFO L93 Difference]: Finished difference Result 1567 states and 7790 transitions. [2021-08-12 19:43:01,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:43:01,510 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 19:43:01,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:01,516 INFO L225 Difference]: With dead ends: 1567 [2021-08-12 19:43:01,516 INFO L226 Difference]: Without dead ends: 1560 [2021-08-12 19:43:01,517 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 545.9ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:43:01,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2021-08-12 19:43:01,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1492. [2021-08-12 19:43:01,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1492 states, 1491 states have (on average 5.061032863849765) internal successors, (7546), 1491 states have internal predecessors, (7546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:01,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1492 states to 1492 states and 7546 transitions. [2021-08-12 19:43:01,626 INFO L78 Accepts]: Start accepts. Automaton has 1492 states and 7546 transitions. Word has length 23 [2021-08-12 19:43:01,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:01,627 INFO L482 AbstractCegarLoop]: Abstraction has 1492 states and 7546 transitions. [2021-08-12 19:43:01,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:01,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1492 states and 7546 transitions. [2021-08-12 19:43:01,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:43:01,630 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:01,630 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:01,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:01,830 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:01,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:01,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1197073225, now seen corresponding path program 8 times [2021-08-12 19:43:01,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:01,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024485346] [2021-08-12 19:43:01,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:01,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:01,923 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:43:01,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:01,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024485346] [2021-08-12 19:43:01,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024485346] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:01,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122440222] [2021-08-12 19:43:01,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:01,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:43:01,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:43:01,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:43:01,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:02,096 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 [2021-08-12 19:43:02,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:43:02,100 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 [2021-08-12 19:43:02,101 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:43:02,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:43:02,130 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 [2021-08-12 19:43:02,131 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:43:02,146 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 [2021-08-12 19:43:02,147 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:43:02,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:43:02,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-08-12 19:43:02,176 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:95, output treesize:67 [2021-08-12 19:43:02,249 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:43:02,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122440222] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:02,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:02,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-08-12 19:43:02,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128331426] [2021-08-12 19:43:02,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:43:02,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:02,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:43:02,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:43:02,250 INFO L87 Difference]: Start difference. First operand 1492 states and 7546 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:02,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:02,834 INFO L93 Difference]: Finished difference Result 2178 states and 10405 transitions. [2021-08-12 19:43:02,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:43:02,834 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 19:43:02,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:02,839 INFO L225 Difference]: With dead ends: 2178 [2021-08-12 19:43:02,839 INFO L226 Difference]: Without dead ends: 1464 [2021-08-12 19:43:02,840 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 364.0ms TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:43:02,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2021-08-12 19:43:02,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1269. [2021-08-12 19:43:02,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 1268 states have (on average 4.833596214511041) internal successors, (6129), 1268 states have internal predecessors, (6129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:02,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 6129 transitions. [2021-08-12 19:43:02,946 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 6129 transitions. Word has length 24 [2021-08-12 19:43:02,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:02,946 INFO L482 AbstractCegarLoop]: Abstraction has 1269 states and 6129 transitions. [2021-08-12 19:43:02,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:02,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 6129 transitions. [2021-08-12 19:43:02,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:43:02,948 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:02,948 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:03,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-08-12 19:43:03,159 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:03,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:03,159 INFO L82 PathProgramCache]: Analyzing trace with hash -687625467, now seen corresponding path program 22 times [2021-08-12 19:43:03,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:03,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58880685] [2021-08-12 19:43:03,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:03,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:03,216 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:43:03,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:03,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58880685] [2021-08-12 19:43:03,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58880685] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:03,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165014299] [2021-08-12 19:43:03,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:03,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:43:03,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:43:03,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:43:03,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:03,367 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 [2021-08-12 19:43:03,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:43:03,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-12 19:43:03,372 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:43:03,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:43:03,406 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 [2021-08-12 19:43:03,407 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:43:03,410 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 [2021-08-12 19:43:03,411 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:43:03,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:43:03,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-08-12 19:43:03,440 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:95, output treesize:67 [2021-08-12 19:43:03,515 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:43:03,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165014299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:03,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:03,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-12 19:43:03,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467951812] [2021-08-12 19:43:03,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:43:03,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:03,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:43:03,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:43:03,516 INFO L87 Difference]: Start difference. First operand 1269 states and 6129 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:04,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:04,105 INFO L93 Difference]: Finished difference Result 2386 states and 11224 transitions. [2021-08-12 19:43:04,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:43:04,105 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 19:43:04,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:04,112 INFO L225 Difference]: With dead ends: 2386 [2021-08-12 19:43:04,112 INFO L226 Difference]: Without dead ends: 1773 [2021-08-12 19:43:04,113 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 199.5ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:43:04,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1773 states. [2021-08-12 19:43:04,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1773 to 1189. [2021-08-12 19:43:04,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 4.688552188552189) internal successors, (5570), 1188 states have internal predecessors, (5570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:04,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 5570 transitions. [2021-08-12 19:43:04,229 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 5570 transitions. Word has length 24 [2021-08-12 19:43:04,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:04,229 INFO L482 AbstractCegarLoop]: Abstraction has 1189 states and 5570 transitions. [2021-08-12 19:43:04,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:04,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 5570 transitions. [2021-08-12 19:43:04,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:43:04,232 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:04,232 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:04,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:04,448 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:04,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:04,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1433709073, now seen corresponding path program 22 times [2021-08-12 19:43:04,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:04,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807270878] [2021-08-12 19:43:04,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:04,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:04,556 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:04,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:04,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807270878] [2021-08-12 19:43:04,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807270878] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:04,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846543239] [2021-08-12 19:43:04,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:04,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:43:04,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:43:04,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 19:43:04,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:05,112 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:05,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846543239] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:05,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:05,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-12 19:43:05,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641370047] [2021-08-12 19:43:05,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:43:05,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:05,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:43:05,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:43:05,113 INFO L87 Difference]: Start difference. First operand 1189 states and 5570 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:05,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:05,582 INFO L93 Difference]: Finished difference Result 1521 states and 6980 transitions. [2021-08-12 19:43:05,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:43:05,583 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 19:43:05,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:05,587 INFO L225 Difference]: With dead ends: 1521 [2021-08-12 19:43:05,587 INFO L226 Difference]: Without dead ends: 1230 [2021-08-12 19:43:05,588 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 554.3ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:43:05,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2021-08-12 19:43:05,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1201. [2021-08-12 19:43:05,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1200 states have (on average 4.66) internal successors, (5592), 1200 states have internal predecessors, (5592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:05,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 5592 transitions. [2021-08-12 19:43:05,706 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 5592 transitions. Word has length 24 [2021-08-12 19:43:05,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:05,706 INFO L482 AbstractCegarLoop]: Abstraction has 1201 states and 5592 transitions. [2021-08-12 19:43:05,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:05,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 5592 transitions. [2021-08-12 19:43:05,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:43:05,708 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:05,708 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:05,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:05,909 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:05,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:05,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1178323821, now seen corresponding path program 23 times [2021-08-12 19:43:05,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:05,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558557853] [2021-08-12 19:43:05,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:05,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:06,010 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:06,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:06,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558557853] [2021-08-12 19:43:06,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558557853] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:06,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967642107] [2021-08-12 19:43:06,011 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:06,049 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 19:43:06,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:43:06,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 19:43:06,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:06,475 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:06,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967642107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:06,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:06,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-12 19:43:06,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51195258] [2021-08-12 19:43:06,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:43:06,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:06,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:43:06,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:43:06,476 INFO L87 Difference]: Start difference. First operand 1201 states and 5592 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:06,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:06,826 INFO L93 Difference]: Finished difference Result 1325 states and 6048 transitions. [2021-08-12 19:43:06,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:43:06,826 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 19:43:06,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:06,831 INFO L225 Difference]: With dead ends: 1325 [2021-08-12 19:43:06,831 INFO L226 Difference]: Without dead ends: 1217 [2021-08-12 19:43:06,832 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 453.7ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:43:06,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2021-08-12 19:43:06,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 1205. [2021-08-12 19:43:06,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 1204 states have (on average 4.649501661129568) internal successors, (5598), 1204 states have internal predecessors, (5598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:06,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 5598 transitions. [2021-08-12 19:43:06,952 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 5598 transitions. Word has length 24 [2021-08-12 19:43:06,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:06,952 INFO L482 AbstractCegarLoop]: Abstraction has 1205 states and 5598 transitions. [2021-08-12 19:43:06,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:06,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 5598 transitions. [2021-08-12 19:43:06,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:43:06,954 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:06,954 INFO L550 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:07,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-08-12 19:43:07,155 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:07,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:07,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1461893903, now seen corresponding path program 24 times [2021-08-12 19:43:07,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:07,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583263172] [2021-08-12 19:43:07,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:07,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:07,259 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:07,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:07,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583263172] [2021-08-12 19:43:07,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583263172] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:07,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360224946] [2021-08-12 19:43:07,259 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:07,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:43:07,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:43:07,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:43:07,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:07,646 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 [2021-08-12 19:43:07,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:43:07,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:43:07,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:43:07,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-08-12 19:43:07,688 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:07,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360224946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:07,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:07,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:43:07,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189250204] [2021-08-12 19:43:07,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:43:07,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:07,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:43:07,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:43:07,689 INFO L87 Difference]: Start difference. First operand 1205 states and 5598 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:08,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:08,138 INFO L93 Difference]: Finished difference Result 1276 states and 5781 transitions. [2021-08-12 19:43:08,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:43:08,139 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 19:43:08,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:08,143 INFO L225 Difference]: With dead ends: 1276 [2021-08-12 19:43:08,143 INFO L226 Difference]: Without dead ends: 1261 [2021-08-12 19:43:08,144 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 435.5ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:43:08,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2021-08-12 19:43:08,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 1207. [2021-08-12 19:43:08,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1206 states have (on average 4.650912106135987) internal successors, (5609), 1206 states have internal predecessors, (5609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:08,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 5609 transitions. [2021-08-12 19:43:08,263 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 5609 transitions. Word has length 24 [2021-08-12 19:43:08,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:08,263 INFO L482 AbstractCegarLoop]: Abstraction has 1207 states and 5609 transitions. [2021-08-12 19:43:08,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:08,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 5609 transitions. [2021-08-12 19:43:08,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:43:08,265 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:08,266 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:08,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-08-12 19:43:08,466 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:08,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:08,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1808359469, now seen corresponding path program 25 times [2021-08-12 19:43:08,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:08,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685455466] [2021-08-12 19:43:08,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:08,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:08,554 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:08,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:08,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685455466] [2021-08-12 19:43:08,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685455466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:08,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921201504] [2021-08-12 19:43:08,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:08,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:08,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 19:43:08,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:09,034 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:09,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921201504] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:09,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:09,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-12 19:43:09,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749083861] [2021-08-12 19:43:09,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:43:09,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:09,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:43:09,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:43:09,035 INFO L87 Difference]: Start difference. First operand 1207 states and 5609 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:09,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:09,582 INFO L93 Difference]: Finished difference Result 1337 states and 6080 transitions. [2021-08-12 19:43:09,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:43:09,582 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 19:43:09,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:09,586 INFO L225 Difference]: With dead ends: 1337 [2021-08-12 19:43:09,586 INFO L226 Difference]: Without dead ends: 1225 [2021-08-12 19:43:09,587 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 545.1ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:43:09,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2021-08-12 19:43:09,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 1205. [2021-08-12 19:43:09,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 1204 states have (on average 4.646179401993355) internal successors, (5594), 1204 states have internal predecessors, (5594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:09,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 5594 transitions. [2021-08-12 19:43:09,694 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 5594 transitions. Word has length 24 [2021-08-12 19:43:09,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:09,694 INFO L482 AbstractCegarLoop]: Abstraction has 1205 states and 5594 transitions. [2021-08-12 19:43:09,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:09,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 5594 transitions. [2021-08-12 19:43:09,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:43:09,696 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:09,696 INFO L550 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:09,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:09,897 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:09,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:09,897 INFO L82 PathProgramCache]: Analyzing trace with hash -800483755, now seen corresponding path program 26 times [2021-08-12 19:43:09,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:09,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914154279] [2021-08-12 19:43:09,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:09,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:10,024 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:10,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:10,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914154279] [2021-08-12 19:43:10,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914154279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:10,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833821904] [2021-08-12 19:43:10,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:10,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:43:10,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:43:10,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 19:43:10,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:10,295 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 [2021-08-12 19:43:10,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:43:10,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:43:10,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:43:10,304 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-08-12 19:43:10,340 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:10,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833821904] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:10,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:10,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:43:10,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741505169] [2021-08-12 19:43:10,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:43:10,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:10,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:43:10,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:43:10,341 INFO L87 Difference]: Start difference. First operand 1205 states and 5594 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:10,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:10,922 INFO L93 Difference]: Finished difference Result 1255 states and 5721 transitions. [2021-08-12 19:43:10,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:43:10,922 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 19:43:10,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:10,926 INFO L225 Difference]: With dead ends: 1255 [2021-08-12 19:43:10,926 INFO L226 Difference]: Without dead ends: 1240 [2021-08-12 19:43:10,926 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 527.4ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:43:10,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-08-12 19:43:11,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1201. [2021-08-12 19:43:11,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1200 states have (on average 4.651666666666666) internal successors, (5582), 1200 states have internal predecessors, (5582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:11,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 5582 transitions. [2021-08-12 19:43:11,033 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 5582 transitions. Word has length 24 [2021-08-12 19:43:11,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:11,033 INFO L482 AbstractCegarLoop]: Abstraction has 1201 states and 5582 transitions. [2021-08-12 19:43:11,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:11,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 5582 transitions. [2021-08-12 19:43:11,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:43:11,035 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:11,035 INFO L550 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:11,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:11,236 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:11,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:11,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1506985901, now seen corresponding path program 27 times [2021-08-12 19:43:11,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:11,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812138089] [2021-08-12 19:43:11,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:11,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:11,364 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:11,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:11,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812138089] [2021-08-12 19:43:11,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812138089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:11,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225129409] [2021-08-12 19:43:11,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:11,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:43:11,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:43:11,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:43:11,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:11,723 INFO L446 ElimStorePlain]: Different costs {0=[node_2], 1=[v_prenex_27]} [2021-08-12 19:43:11,726 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 [2021-08-12 19:43:11,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:43:11,748 INFO L628 ElimStorePlain]: treesize reduction 52, result has 37.3 percent of original size [2021-08-12 19:43:11,748 INFO L518 ElimStorePlain]: Eliminatee v_prenex_27 vanished before elimination [2021-08-12 19:43:11,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:43:11,749 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:90, output treesize:31 [2021-08-12 19:43:11,787 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:11,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225129409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:11,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:11,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:43:11,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043098105] [2021-08-12 19:43:11,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:43:11,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:11,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:43:11,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:43:11,788 INFO L87 Difference]: Start difference. First operand 1201 states and 5582 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:12,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:12,527 INFO L93 Difference]: Finished difference Result 1244 states and 5697 transitions. [2021-08-12 19:43:12,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:43:12,528 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 19:43:12,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:12,532 INFO L225 Difference]: With dead ends: 1244 [2021-08-12 19:43:12,532 INFO L226 Difference]: Without dead ends: 1227 [2021-08-12 19:43:12,533 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 675.6ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:43:12,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2021-08-12 19:43:12,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1209. [2021-08-12 19:43:12,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 1208 states have (on average 4.6490066225165565) internal successors, (5616), 1208 states have internal predecessors, (5616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:12,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 5616 transitions. [2021-08-12 19:43:12,641 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 5616 transitions. Word has length 24 [2021-08-12 19:43:12,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:12,641 INFO L482 AbstractCegarLoop]: Abstraction has 1209 states and 5616 transitions. [2021-08-12 19:43:12,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:12,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 5616 transitions. [2021-08-12 19:43:12,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:43:12,643 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:12,643 INFO L550 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:12,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-08-12 19:43:12,857 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:12,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:12,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1553209715, now seen corresponding path program 28 times [2021-08-12 19:43:12,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:12,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764004392] [2021-08-12 19:43:12,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:12,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:12,947 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:43:12,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:12,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764004392] [2021-08-12 19:43:12,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764004392] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:12,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079953947] [2021-08-12 19:43:12,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:12,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:43:12,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:43:12,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:43:12,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:13,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-12 19:43:13,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:43:13,144 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 [2021-08-12 19:43:13,145 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:43:13,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:43:13,172 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. [2021-08-12 19:43:13,173 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-08-12 19:43:13,262 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:43:13,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079953947] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:13,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:13,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-08-12 19:43:13,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499292449] [2021-08-12 19:43:13,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:43:13,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:13,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:43:13,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:43:13,263 INFO L87 Difference]: Start difference. First operand 1209 states and 5616 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:13,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:13,798 INFO L93 Difference]: Finished difference Result 1665 states and 7330 transitions. [2021-08-12 19:43:13,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:43:13,798 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 19:43:13,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:13,802 INFO L225 Difference]: With dead ends: 1665 [2021-08-12 19:43:13,802 INFO L226 Difference]: Without dead ends: 1213 [2021-08-12 19:43:13,803 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 369.1ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:43:13,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2021-08-12 19:43:13,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1052. [2021-08-12 19:43:13,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1051 states have (on average 4.60418648905804) internal successors, (4839), 1051 states have internal predecessors, (4839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:13,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 4839 transitions. [2021-08-12 19:43:13,900 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 4839 transitions. Word has length 24 [2021-08-12 19:43:13,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:13,900 INFO L482 AbstractCegarLoop]: Abstraction has 1052 states and 4839 transitions. [2021-08-12 19:43:13,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:13,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 4839 transitions. [2021-08-12 19:43:13,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:43:13,902 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:13,902 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:14,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:14,102 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:14,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:14,103 INFO L82 PathProgramCache]: Analyzing trace with hash 528495791, now seen corresponding path program 29 times [2021-08-12 19:43:14,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:14,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537270078] [2021-08-12 19:43:14,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:14,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:14,204 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:14,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:14,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537270078] [2021-08-12 19:43:14,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537270078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:14,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993572478] [2021-08-12 19:43:14,205 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:14,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-12 19:43:14,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:43:14,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:43:14,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:14,617 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:14,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993572478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:14,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:14,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-12 19:43:14,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21172632] [2021-08-12 19:43:14,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:43:14,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:14,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:43:14,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:43:14,618 INFO L87 Difference]: Start difference. First operand 1052 states and 4839 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:15,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:15,112 INFO L93 Difference]: Finished difference Result 1200 states and 5361 transitions. [2021-08-12 19:43:15,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:43:15,112 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 19:43:15,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:15,116 INFO L225 Difference]: With dead ends: 1200 [2021-08-12 19:43:15,116 INFO L226 Difference]: Without dead ends: 1074 [2021-08-12 19:43:15,117 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 415.0ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:43:15,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-08-12 19:43:15,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 1050. [2021-08-12 19:43:15,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1049 states have (on average 4.598665395614871) internal successors, (4824), 1049 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:15,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 4824 transitions. [2021-08-12 19:43:15,213 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 4824 transitions. Word has length 24 [2021-08-12 19:43:15,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:15,213 INFO L482 AbstractCegarLoop]: Abstraction has 1050 states and 4824 transitions. [2021-08-12 19:43:15,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:15,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 4824 transitions. [2021-08-12 19:43:15,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:43:15,215 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:15,215 INFO L550 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:15,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:15,416 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:15,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:15,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1069230183, now seen corresponding path program 30 times [2021-08-12 19:43:15,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:15,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383698700] [2021-08-12 19:43:15,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:15,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:15,567 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:15,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:15,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383698700] [2021-08-12 19:43:15,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383698700] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:15,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911249663] [2021-08-12 19:43:15,567 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:15,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:43:15,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:43:15,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:43:15,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:15,850 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 [2021-08-12 19:43:15,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:43:15,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:43:15,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:43:15,858 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-08-12 19:43:15,893 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:15,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911249663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:15,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:15,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:43:15,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218640560] [2021-08-12 19:43:15,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:43:15,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:15,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:43:15,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:43:15,894 INFO L87 Difference]: Start difference. First operand 1050 states and 4824 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:16,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:16,289 INFO L93 Difference]: Finished difference Result 1101 states and 4957 transitions. [2021-08-12 19:43:16,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:43:16,289 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 19:43:16,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:16,293 INFO L225 Difference]: With dead ends: 1101 [2021-08-12 19:43:16,293 INFO L226 Difference]: Without dead ends: 1086 [2021-08-12 19:43:16,294 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 375.3ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:43:16,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-08-12 19:43:16,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 1046. [2021-08-12 19:43:16,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1045 states have (on average 4.604784688995215) internal successors, (4812), 1045 states have internal predecessors, (4812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:16,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 4812 transitions. [2021-08-12 19:43:16,390 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 4812 transitions. Word has length 24 [2021-08-12 19:43:16,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:16,390 INFO L482 AbstractCegarLoop]: Abstraction has 1046 states and 4812 transitions. [2021-08-12 19:43:16,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:16,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 4812 transitions. [2021-08-12 19:43:16,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:43:16,392 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:16,392 INFO L550 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:16,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-08-12 19:43:16,593 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:16,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:16,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1249973783, now seen corresponding path program 31 times [2021-08-12 19:43:16,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:16,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428519572] [2021-08-12 19:43:16,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:16,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:16,770 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:16,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:16,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428519572] [2021-08-12 19:43:16,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428519572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:16,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849309484] [2021-08-12 19:43:16,770 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:16,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:16,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:43:16,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:17,060 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:17,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849309484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:17,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:17,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:43:17,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092596221] [2021-08-12 19:43:17,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:43:17,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:17,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:43:17,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:43:17,061 INFO L87 Difference]: Start difference. First operand 1046 states and 4812 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:17,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:17,549 INFO L93 Difference]: Finished difference Result 1142 states and 5067 transitions. [2021-08-12 19:43:17,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:43:17,550 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 19:43:17,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:17,554 INFO L225 Difference]: With dead ends: 1142 [2021-08-12 19:43:17,554 INFO L226 Difference]: Without dead ends: 1108 [2021-08-12 19:43:17,554 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 455.3ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:43:17,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-08-12 19:43:17,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 1059. [2021-08-12 19:43:17,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 1058 states have (on average 4.581285444234404) internal successors, (4847), 1058 states have internal predecessors, (4847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:17,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 4847 transitions. [2021-08-12 19:43:17,652 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 4847 transitions. Word has length 24 [2021-08-12 19:43:17,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:17,652 INFO L482 AbstractCegarLoop]: Abstraction has 1059 states and 4847 transitions. [2021-08-12 19:43:17,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:17,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 4847 transitions. [2021-08-12 19:43:17,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:43:17,654 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:17,654 INFO L550 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:17,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:17,856 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:17,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:17,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1775732329, now seen corresponding path program 32 times [2021-08-12 19:43:17,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:17,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66201760] [2021-08-12 19:43:17,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:17,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:18,046 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:18,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:18,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66201760] [2021-08-12 19:43:18,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66201760] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:18,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219533872] [2021-08-12 19:43:18,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:18,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:43:18,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:43:18,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:43:18,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:18,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-12 19:43:18,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:43:18,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:43:18,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:43:18,331 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-08-12 19:43:18,363 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:18,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219533872] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:18,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:18,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:43:18,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284726874] [2021-08-12 19:43:18,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:43:18,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:18,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:43:18,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:43:18,364 INFO L87 Difference]: Start difference. First operand 1059 states and 4847 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:18,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:18,900 INFO L93 Difference]: Finished difference Result 1103 states and 4959 transitions. [2021-08-12 19:43:18,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:43:18,900 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 19:43:18,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:18,904 INFO L225 Difference]: With dead ends: 1103 [2021-08-12 19:43:18,904 INFO L226 Difference]: Without dead ends: 1086 [2021-08-12 19:43:18,904 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 548.5ms TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:43:18,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-08-12 19:43:18,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 1061. [2021-08-12 19:43:18,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 1060 states have (on average 4.583018867924529) internal successors, (4858), 1060 states have internal predecessors, (4858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:19,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 4858 transitions. [2021-08-12 19:43:19,003 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 4858 transitions. Word has length 24 [2021-08-12 19:43:19,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:19,003 INFO L482 AbstractCegarLoop]: Abstraction has 1061 states and 4858 transitions. [2021-08-12 19:43:19,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:19,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 4858 transitions. [2021-08-12 19:43:19,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:43:19,005 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:19,005 INFO L550 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:19,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:19,206 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:19,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:19,206 INFO L82 PathProgramCache]: Analyzing trace with hash 2102593587, now seen corresponding path program 33 times [2021-08-12 19:43:19,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:19,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322458351] [2021-08-12 19:43:19,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:19,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:19,338 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:19,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:19,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322458351] [2021-08-12 19:43:19,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322458351] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:19,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718270555] [2021-08-12 19:43:19,339 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:19,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:43:19,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:43:19,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:43:19,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:19,634 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:19,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718270555] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:19,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:19,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:43:19,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083837180] [2021-08-12 19:43:19,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:43:19,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:19,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:43:19,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:43:19,635 INFO L87 Difference]: Start difference. First operand 1061 states and 4858 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:20,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:20,127 INFO L93 Difference]: Finished difference Result 1144 states and 5073 transitions. [2021-08-12 19:43:20,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:43:20,128 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 19:43:20,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:20,131 INFO L225 Difference]: With dead ends: 1144 [2021-08-12 19:43:20,132 INFO L226 Difference]: Without dead ends: 1110 [2021-08-12 19:43:20,132 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 399.4ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:43:20,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-08-12 19:43:20,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 1048. [2021-08-12 19:43:20,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1047 states have (on average 4.6017191977077365) internal successors, (4818), 1047 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:20,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 4818 transitions. [2021-08-12 19:43:20,229 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 4818 transitions. Word has length 24 [2021-08-12 19:43:20,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:20,230 INFO L482 AbstractCegarLoop]: Abstraction has 1048 states and 4818 transitions. [2021-08-12 19:43:20,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:20,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 4818 transitions. [2021-08-12 19:43:20,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:43:20,231 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:20,231 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:20,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:20,433 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:20,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:20,433 INFO L82 PathProgramCache]: Analyzing trace with hash -2029878931, now seen corresponding path program 34 times [2021-08-12 19:43:20,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:20,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445035557] [2021-08-12 19:43:20,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:20,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:20,581 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:20,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:20,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445035557] [2021-08-12 19:43:20,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445035557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:20,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583905069] [2021-08-12 19:43:20,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:20,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:43:20,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:43:20,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 19:43:20,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:21,053 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:21,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583905069] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:21,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:21,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-08-12 19:43:21,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388107813] [2021-08-12 19:43:21,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:43:21,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:21,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:43:21,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:43:21,054 INFO L87 Difference]: Start difference. First operand 1048 states and 4818 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:21,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:21,749 INFO L93 Difference]: Finished difference Result 1277 states and 5775 transitions. [2021-08-12 19:43:21,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:43:21,749 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 19:43:21,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:21,753 INFO L225 Difference]: With dead ends: 1277 [2021-08-12 19:43:21,753 INFO L226 Difference]: Without dead ends: 1066 [2021-08-12 19:43:21,754 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 781.7ms TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:43:21,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2021-08-12 19:43:21,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1048. [2021-08-12 19:43:21,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1047 states have (on average 4.5978987583572115) internal successors, (4814), 1047 states have internal predecessors, (4814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:21,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 4814 transitions. [2021-08-12 19:43:21,853 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 4814 transitions. Word has length 24 [2021-08-12 19:43:21,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:21,853 INFO L482 AbstractCegarLoop]: Abstraction has 1048 states and 4814 transitions. [2021-08-12 19:43:21,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:21,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 4814 transitions. [2021-08-12 19:43:21,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:43:21,855 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:21,855 INFO L550 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:22,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:22,069 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:22,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:22,069 INFO L82 PathProgramCache]: Analyzing trace with hash 2094923731, now seen corresponding path program 35 times [2021-08-12 19:43:22,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:22,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311535346] [2021-08-12 19:43:22,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:22,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:22,203 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:22,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:22,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311535346] [2021-08-12 19:43:22,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311535346] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:22,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596952943] [2021-08-12 19:43:22,203 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:22,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:43:22,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:43:22,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:43:22,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:22,562 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 [2021-08-12 19:43:22,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:43:22,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:43:22,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:43:22,572 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-08-12 19:43:22,606 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:22,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596952943] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:22,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:22,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:43:22,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796680537] [2021-08-12 19:43:22,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:43:22,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:22,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:43:22,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:43:22,607 INFO L87 Difference]: Start difference. First operand 1048 states and 4814 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:23,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:23,072 INFO L93 Difference]: Finished difference Result 1109 states and 4972 transitions. [2021-08-12 19:43:23,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:43:23,072 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 19:43:23,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:23,077 INFO L225 Difference]: With dead ends: 1109 [2021-08-12 19:43:23,077 INFO L226 Difference]: Without dead ends: 1092 [2021-08-12 19:43:23,077 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 480.2ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:43:23,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2021-08-12 19:43:23,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 1050. [2021-08-12 19:43:23,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1049 states have (on average 4.599618684461392) internal successors, (4825), 1049 states have internal predecessors, (4825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:23,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 4825 transitions. [2021-08-12 19:43:23,177 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 4825 transitions. Word has length 24 [2021-08-12 19:43:23,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:23,177 INFO L482 AbstractCegarLoop]: Abstraction has 1050 states and 4825 transitions. [2021-08-12 19:43:23,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:23,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 4825 transitions. [2021-08-12 19:43:23,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:43:23,179 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:23,179 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:23,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:23,379 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:23,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:23,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1420116913, now seen corresponding path program 36 times [2021-08-12 19:43:23,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:23,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620043885] [2021-08-12 19:43:23,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:23,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:23,484 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:23,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:23,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620043885] [2021-08-12 19:43:23,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620043885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:23,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311141307] [2021-08-12 19:43:23,484 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:23,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 19:43:23,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:43:23,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 19:43:23,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:23,928 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:23,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311141307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:23,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:23,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-12 19:43:23,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206898433] [2021-08-12 19:43:23,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:43:23,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:23,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:43:23,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:43:23,929 INFO L87 Difference]: Start difference. First operand 1050 states and 4825 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:24,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:24,517 INFO L93 Difference]: Finished difference Result 1279 states and 5782 transitions. [2021-08-12 19:43:24,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:43:24,518 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 19:43:24,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:24,522 INFO L225 Difference]: With dead ends: 1279 [2021-08-12 19:43:24,522 INFO L226 Difference]: Without dead ends: 1064 [2021-08-12 19:43:24,523 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 633.1ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:43:24,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2021-08-12 19:43:24,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 1046. [2021-08-12 19:43:24,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1045 states have (on average 4.598086124401914) internal successors, (4805), 1045 states have internal predecessors, (4805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:24,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 4805 transitions. [2021-08-12 19:43:24,621 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 4805 transitions. Word has length 24 [2021-08-12 19:43:24,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:24,622 INFO L482 AbstractCegarLoop]: Abstraction has 1046 states and 4805 transitions. [2021-08-12 19:43:24,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:24,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 4805 transitions. [2021-08-12 19:43:24,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:43:24,623 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:24,623 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:24,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2021-08-12 19:43:24,824 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:24,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:24,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1692504397, now seen corresponding path program 37 times [2021-08-12 19:43:24,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:24,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721148848] [2021-08-12 19:43:24,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:24,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:24,943 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:24,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:24,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721148848] [2021-08-12 19:43:24,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721148848] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:24,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631259397] [2021-08-12 19:43:24,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:24,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:24,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 19:43:24,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:25,502 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:25,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631259397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:25,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:25,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-12 19:43:25,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280404425] [2021-08-12 19:43:25,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:43:25,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:25,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:43:25,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:43:25,503 INFO L87 Difference]: Start difference. First operand 1046 states and 4805 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:26,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:26,099 INFO L93 Difference]: Finished difference Result 1251 states and 5517 transitions. [2021-08-12 19:43:26,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:43:26,101 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 19:43:26,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:26,105 INFO L225 Difference]: With dead ends: 1251 [2021-08-12 19:43:26,105 INFO L226 Difference]: Without dead ends: 1049 [2021-08-12 19:43:26,106 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 711.9ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:43:26,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2021-08-12 19:43:26,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 1009. [2021-08-12 19:43:26,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 1008 states have (on average 4.565476190476191) internal successors, (4602), 1008 states have internal predecessors, (4602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:26,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 4602 transitions. [2021-08-12 19:43:26,203 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 4602 transitions. Word has length 24 [2021-08-12 19:43:26,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:26,203 INFO L482 AbstractCegarLoop]: Abstraction has 1009 states and 4602 transitions. [2021-08-12 19:43:26,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:26,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 4602 transitions. [2021-08-12 19:43:26,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:43:26,205 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:26,205 INFO L550 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:26,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:26,405 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:26,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:26,406 INFO L82 PathProgramCache]: Analyzing trace with hash -12313431, now seen corresponding path program 38 times [2021-08-12 19:43:26,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:26,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157123557] [2021-08-12 19:43:26,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:26,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:26,486 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:26,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:26,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157123557] [2021-08-12 19:43:26,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157123557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:26,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688197146] [2021-08-12 19:43:26,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:26,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:43:26,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:43:26,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:43:26,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:26,711 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 [2021-08-12 19:43:26,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:43:26,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:43:26,720 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. [2021-08-12 19:43:26,720 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:33 [2021-08-12 19:43:26,763 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:26,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688197146] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:26,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:26,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-08-12 19:43:26,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622934370] [2021-08-12 19:43:26,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:43:26,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:26,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:43:26,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:43:26,764 INFO L87 Difference]: Start difference. First operand 1009 states and 4602 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:27,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:27,349 INFO L93 Difference]: Finished difference Result 1688 states and 7294 transitions. [2021-08-12 19:43:27,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:43:27,349 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 19:43:27,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:27,354 INFO L225 Difference]: With dead ends: 1688 [2021-08-12 19:43:27,354 INFO L226 Difference]: Without dead ends: 1179 [2021-08-12 19:43:27,355 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 391.3ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:43:27,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2021-08-12 19:43:27,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 925. [2021-08-12 19:43:27,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 924 states have (on average 4.41991341991342) internal successors, (4084), 924 states have internal predecessors, (4084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:27,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 4084 transitions. [2021-08-12 19:43:27,454 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 4084 transitions. Word has length 24 [2021-08-12 19:43:27,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:27,454 INFO L482 AbstractCegarLoop]: Abstraction has 925 states and 4084 transitions. [2021-08-12 19:43:27,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:27,454 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 4084 transitions. [2021-08-12 19:43:27,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:43:27,456 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:27,456 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:27,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-08-12 19:43:27,656 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:27,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:27,657 INFO L82 PathProgramCache]: Analyzing trace with hash -919528497, now seen corresponding path program 39 times [2021-08-12 19:43:27,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:27,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714118759] [2021-08-12 19:43:27,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:27,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:27,764 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:27,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:27,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714118759] [2021-08-12 19:43:27,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714118759] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:27,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280664486] [2021-08-12 19:43:27,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:27,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 19:43:27,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:43:27,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 19:43:27,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:28,234 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:28,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280664486] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:28,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:28,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-12 19:43:28,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791934913] [2021-08-12 19:43:28,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:43:28,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:28,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:43:28,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:43:28,235 INFO L87 Difference]: Start difference. First operand 925 states and 4084 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:28,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:28,952 INFO L93 Difference]: Finished difference Result 1065 states and 4581 transitions. [2021-08-12 19:43:28,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:43:28,953 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 19:43:28,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:28,957 INFO L225 Difference]: With dead ends: 1065 [2021-08-12 19:43:28,957 INFO L226 Difference]: Without dead ends: 951 [2021-08-12 19:43:28,957 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 764.8ms TimeCoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:43:28,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-08-12 19:43:29,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 927. [2021-08-12 19:43:29,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 926 states have (on average 4.411447084233261) internal successors, (4085), 926 states have internal predecessors, (4085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:29,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 4085 transitions. [2021-08-12 19:43:29,052 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 4085 transitions. Word has length 24 [2021-08-12 19:43:29,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:29,053 INFO L482 AbstractCegarLoop]: Abstraction has 927 states and 4085 transitions. [2021-08-12 19:43:29,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:29,053 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 4085 transitions. [2021-08-12 19:43:29,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:43:29,054 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:29,054 INFO L550 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:29,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2021-08-12 19:43:29,255 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:29,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:29,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1203098579, now seen corresponding path program 40 times [2021-08-12 19:43:29,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:29,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048246173] [2021-08-12 19:43:29,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:29,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:29,414 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:29,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:29,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048246173] [2021-08-12 19:43:29,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048246173] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:29,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974113704] [2021-08-12 19:43:29,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:29,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:43:29,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:43:29,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:43:29,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:29,787 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 [2021-08-12 19:43:29,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:43:29,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:43:29,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:43:29,798 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-08-12 19:43:29,839 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:29,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974113704] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:29,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:29,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:43:29,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539422555] [2021-08-12 19:43:29,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:43:29,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:29,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:43:29,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:43:29,840 INFO L87 Difference]: Start difference. First operand 927 states and 4085 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:30,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:30,552 INFO L93 Difference]: Finished difference Result 1004 states and 4291 transitions. [2021-08-12 19:43:30,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:43:30,553 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 19:43:30,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:30,557 INFO L225 Difference]: With dead ends: 1004 [2021-08-12 19:43:30,557 INFO L226 Difference]: Without dead ends: 989 [2021-08-12 19:43:30,557 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 745.9ms TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:43:30,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2021-08-12 19:43:30,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 931. [2021-08-12 19:43:30,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 4.411827956989248) internal successors, (4103), 930 states have internal predecessors, (4103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:30,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 4103 transitions. [2021-08-12 19:43:30,653 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 4103 transitions. Word has length 24 [2021-08-12 19:43:30,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:30,653 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 4103 transitions. [2021-08-12 19:43:30,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:30,653 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 4103 transitions. [2021-08-12 19:43:30,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:43:30,655 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:30,655 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:30,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-08-12 19:43:30,857 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:30,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:30,857 INFO L82 PathProgramCache]: Analyzing trace with hash 2067154793, now seen corresponding path program 41 times [2021-08-12 19:43:30,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:30,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494827955] [2021-08-12 19:43:30,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:30,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:30,964 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:30,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:30,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494827955] [2021-08-12 19:43:30,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494827955] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:30,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363814038] [2021-08-12 19:43:30,964 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:31,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:43:31,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:43:31,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:43:31,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:31,667 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-08-12 19:43:31,751 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:31,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363814038] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:31,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:31,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-12 19:43:31,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994371700] [2021-08-12 19:43:31,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:43:31,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:31,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:43:31,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:43:31,752 INFO L87 Difference]: Start difference. First operand 931 states and 4103 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:32,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:32,125 INFO L93 Difference]: Finished difference Result 1067 states and 4591 transitions. [2021-08-12 19:43:32,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:43:32,126 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 19:43:32,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:32,130 INFO L225 Difference]: With dead ends: 1067 [2021-08-12 19:43:32,130 INFO L226 Difference]: Without dead ends: 955 [2021-08-12 19:43:32,130 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 713.3ms TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:43:32,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-08-12 19:43:32,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 929. [2021-08-12 19:43:32,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 4.405172413793103) internal successors, (4088), 928 states have internal predecessors, (4088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:32,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 4088 transitions. [2021-08-12 19:43:32,227 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 4088 transitions. Word has length 24 [2021-08-12 19:43:32,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:32,227 INFO L482 AbstractCegarLoop]: Abstraction has 929 states and 4088 transitions. [2021-08-12 19:43:32,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:32,227 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 4088 transitions. [2021-08-12 19:43:32,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:43:32,228 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:32,228 INFO L550 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:32,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-08-12 19:43:32,429 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:32,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:32,429 INFO L82 PathProgramCache]: Analyzing trace with hash -541688431, now seen corresponding path program 42 times [2021-08-12 19:43:32,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:32,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506514598] [2021-08-12 19:43:32,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:32,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:32,548 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:32,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:32,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506514598] [2021-08-12 19:43:32,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506514598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:32,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645351313] [2021-08-12 19:43:32,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:32,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:43:32,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:43:32,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:43:32,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:32,820 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 [2021-08-12 19:43:32,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:43:32,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:43:32,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:43:32,828 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-08-12 19:43:32,863 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:32,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645351313] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:32,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:32,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:43:32,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326429667] [2021-08-12 19:43:32,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:43:32,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:32,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:43:32,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:43:32,864 INFO L87 Difference]: Start difference. First operand 929 states and 4088 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:33,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:33,254 INFO L93 Difference]: Finished difference Result 980 states and 4221 transitions. [2021-08-12 19:43:33,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:43:33,254 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 19:43:33,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:33,259 INFO L225 Difference]: With dead ends: 980 [2021-08-12 19:43:33,259 INFO L226 Difference]: Without dead ends: 965 [2021-08-12 19:43:33,259 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 355.6ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:43:33,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2021-08-12 19:43:33,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 921. [2021-08-12 19:43:33,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 920 states have (on average 4.417391304347826) internal successors, (4064), 920 states have internal predecessors, (4064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:33,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 4064 transitions. [2021-08-12 19:43:33,355 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 4064 transitions. Word has length 24 [2021-08-12 19:43:33,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:33,355 INFO L482 AbstractCegarLoop]: Abstraction has 921 states and 4064 transitions. [2021-08-12 19:43:33,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:33,355 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 4064 transitions. [2021-08-12 19:43:33,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:43:33,356 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:33,356 INFO L550 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:33,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:33,557 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:33,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:33,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1248190577, now seen corresponding path program 43 times [2021-08-12 19:43:33,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:33,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613644323] [2021-08-12 19:43:33,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:33,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:33,672 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:33,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:33,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613644323] [2021-08-12 19:43:33,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613644323] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:33,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027712123] [2021-08-12 19:43:33,673 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:33,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:33,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:43:33,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:33,969 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 [2021-08-12 19:43:33,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:43:33,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:43:33,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:43:33,977 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-08-12 19:43:34,011 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:34,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027712123] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:34,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:34,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:43:34,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712800135] [2021-08-12 19:43:34,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:43:34,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:34,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:43:34,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:43:34,012 INFO L87 Difference]: Start difference. First operand 921 states and 4064 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:34,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:34,487 INFO L93 Difference]: Finished difference Result 964 states and 4161 transitions. [2021-08-12 19:43:34,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:43:34,488 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 19:43:34,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:34,492 INFO L225 Difference]: With dead ends: 964 [2021-08-12 19:43:34,492 INFO L226 Difference]: Without dead ends: 947 [2021-08-12 19:43:34,492 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 449.6ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:43:34,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2021-08-12 19:43:34,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 919. [2021-08-12 19:43:34,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 4.415032679738562) internal successors, (4053), 918 states have internal predecessors, (4053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:34,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 4053 transitions. [2021-08-12 19:43:34,588 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 4053 transitions. Word has length 24 [2021-08-12 19:43:34,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:34,588 INFO L482 AbstractCegarLoop]: Abstraction has 919 states and 4053 transitions. [2021-08-12 19:43:34,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:34,588 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 4053 transitions. [2021-08-12 19:43:34,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:43:34,589 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:34,589 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:34,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:34,790 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:34,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:34,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1188274925, now seen corresponding path program 44 times [2021-08-12 19:43:34,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:34,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830135666] [2021-08-12 19:43:34,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:34,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:34,886 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:34,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:34,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830135666] [2021-08-12 19:43:34,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830135666] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:34,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412800301] [2021-08-12 19:43:34,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:34,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:43:34,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:43:34,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 19:43:34,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:35,247 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:35,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412800301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:35,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:35,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-12 19:43:35,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200399263] [2021-08-12 19:43:35,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:43:35,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:35,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:43:35,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:43:35,248 INFO L87 Difference]: Start difference. First operand 919 states and 4053 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:35,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:35,880 INFO L93 Difference]: Finished difference Result 1049 states and 4524 transitions. [2021-08-12 19:43:35,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:43:35,881 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 19:43:35,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:35,885 INFO L225 Difference]: With dead ends: 1049 [2021-08-12 19:43:35,885 INFO L226 Difference]: Without dead ends: 943 [2021-08-12 19:43:35,885 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 612.6ms TimeCoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:43:35,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-08-12 19:43:35,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 917. [2021-08-12 19:43:35,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 916 states have (on average 4.41703056768559) internal successors, (4046), 916 states have internal predecessors, (4046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:35,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 4046 transitions. [2021-08-12 19:43:35,980 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 4046 transitions. Word has length 24 [2021-08-12 19:43:35,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:35,980 INFO L482 AbstractCegarLoop]: Abstraction has 917 states and 4046 transitions. [2021-08-12 19:43:35,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:35,980 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 4046 transitions. [2021-08-12 19:43:35,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:43:35,981 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:35,981 INFO L550 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:36,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-08-12 19:43:36,182 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:36,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:36,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1471845007, now seen corresponding path program 45 times [2021-08-12 19:43:36,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:36,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271057162] [2021-08-12 19:43:36,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:36,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:36,283 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:36,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:36,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271057162] [2021-08-12 19:43:36,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271057162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:36,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029709603] [2021-08-12 19:43:36,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:36,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:43:36,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:43:36,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:43:36,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:36,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-12 19:43:36,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:43:36,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:43:36,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:43:36,697 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-08-12 19:43:36,731 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:36,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029709603] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:36,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:36,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 19:43:36,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680948602] [2021-08-12 19:43:36,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:43:36,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:36,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:43:36,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:43:36,732 INFO L87 Difference]: Start difference. First operand 917 states and 4046 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:37,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:37,255 INFO L93 Difference]: Finished difference Result 1236 states and 5099 transitions. [2021-08-12 19:43:37,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:43:37,255 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 19:43:37,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:37,261 INFO L225 Difference]: With dead ends: 1236 [2021-08-12 19:43:37,261 INFO L226 Difference]: Without dead ends: 1207 [2021-08-12 19:43:37,261 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 448.2ms TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:43:37,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2021-08-12 19:43:37,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 959. [2021-08-12 19:43:37,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 958 states have (on average 4.458246346555324) internal successors, (4271), 958 states have internal predecessors, (4271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:37,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 4271 transitions. [2021-08-12 19:43:37,359 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 4271 transitions. Word has length 24 [2021-08-12 19:43:37,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:37,359 INFO L482 AbstractCegarLoop]: Abstraction has 959 states and 4271 transitions. [2021-08-12 19:43:37,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:37,359 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 4271 transitions. [2021-08-12 19:43:37,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:43:37,360 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:37,360 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:37,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-08-12 19:43:37,561 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:37,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:37,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1798408365, now seen corresponding path program 46 times [2021-08-12 19:43:37,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:37,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109254029] [2021-08-12 19:43:37,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:37,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:37,685 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:37,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:37,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109254029] [2021-08-12 19:43:37,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109254029] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:37,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980924229] [2021-08-12 19:43:37,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:37,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:43:37,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:43:37,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 19:43:37,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:38,153 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:38,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980924229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:38,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:38,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-12 19:43:38,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240535393] [2021-08-12 19:43:38,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:43:38,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:38,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:43:38,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:43:38,154 INFO L87 Difference]: Start difference. First operand 959 states and 4271 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:38,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:38,758 INFO L93 Difference]: Finished difference Result 1095 states and 4763 transitions. [2021-08-12 19:43:38,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:43:38,758 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 19:43:38,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:38,762 INFO L225 Difference]: With dead ends: 1095 [2021-08-12 19:43:38,762 INFO L226 Difference]: Without dead ends: 987 [2021-08-12 19:43:38,763 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 638.7ms TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:43:38,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2021-08-12 19:43:38,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 959. [2021-08-12 19:43:38,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 958 states have (on average 4.449895615866389) internal successors, (4263), 958 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:38,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 4263 transitions. [2021-08-12 19:43:38,871 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 4263 transitions. Word has length 24 [2021-08-12 19:43:38,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:38,871 INFO L482 AbstractCegarLoop]: Abstraction has 959 states and 4263 transitions. [2021-08-12 19:43:38,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:38,871 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 4263 transitions. [2021-08-12 19:43:38,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:43:38,872 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:38,872 INFO L550 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:39,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-08-12 19:43:39,073 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:39,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:39,073 INFO L82 PathProgramCache]: Analyzing trace with hash 2054881064, now seen corresponding path program 23 times [2021-08-12 19:43:39,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:39,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466848380] [2021-08-12 19:43:39,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:39,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:39,132 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 19:43:39,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:39,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466848380] [2021-08-12 19:43:39,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466848380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:39,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887953920] [2021-08-12 19:43:39,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:39,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:43:39,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:43:39,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 19:43:39,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:39,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-12 19:43:39,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:43:39,385 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:43:39,386 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:43:39,408 INFO L628 ElimStorePlain]: treesize reduction 7, result has 85.7 percent of original size [2021-08-12 19:43:39,409 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. [2021-08-12 19:43:39,409 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:115, output treesize:42 [2021-08-12 19:43:39,451 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 19:43:39,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887953920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:39,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:39,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-08-12 19:43:39,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160995682] [2021-08-12 19:43:39,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:43:39,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:39,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:43:39,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:43:39,451 INFO L87 Difference]: Start difference. First operand 959 states and 4263 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:39,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:39,824 INFO L93 Difference]: Finished difference Result 1454 states and 6296 transitions. [2021-08-12 19:43:39,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:43:39,824 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:43:39,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:39,828 INFO L225 Difference]: With dead ends: 1454 [2021-08-12 19:43:39,828 INFO L226 Difference]: Without dead ends: 892 [2021-08-12 19:43:39,829 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 266.5ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:43:39,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2021-08-12 19:43:39,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 763. [2021-08-12 19:43:39,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 4.2204724409448815) internal successors, (3216), 762 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:39,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 3216 transitions. [2021-08-12 19:43:39,917 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 3216 transitions. Word has length 25 [2021-08-12 19:43:39,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:39,918 INFO L482 AbstractCegarLoop]: Abstraction has 763 states and 3216 transitions. [2021-08-12 19:43:39,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:39,918 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 3216 transitions. [2021-08-12 19:43:39,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:43:39,919 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:39,919 INFO L550 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:40,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:40,119 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:40,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:40,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1538598462, now seen corresponding path program 47 times [2021-08-12 19:43:40,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:40,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544054522] [2021-08-12 19:43:40,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:40,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:40,177 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:43:40,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:40,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544054522] [2021-08-12 19:43:40,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544054522] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:40,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354416176] [2021-08-12 19:43:40,178 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:40,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:43:40,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:43:40,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:43:40,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:40,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-12 19:43:40,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:43:40,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-12 19:43:40,376 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:43:40,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:43:40,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-08-12 19:43:40,412 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:109, output treesize:95 [2021-08-12 19:43:40,741 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:43:40,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354416176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:40,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:40,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-08-12 19:43:40,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31340886] [2021-08-12 19:43:40,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:43:40,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:40,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:43:40,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:43:40,742 INFO L87 Difference]: Start difference. First operand 763 states and 3216 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:41,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:41,308 INFO L93 Difference]: Finished difference Result 1343 states and 5344 transitions. [2021-08-12 19:43:41,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:43:41,309 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:43:41,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:41,313 INFO L225 Difference]: With dead ends: 1343 [2021-08-12 19:43:41,313 INFO L226 Difference]: Without dead ends: 1159 [2021-08-12 19:43:41,314 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 360.8ms TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:43:41,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-08-12 19:43:41,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 766. [2021-08-12 19:43:41,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 765 states have (on average 4.203921568627451) internal successors, (3216), 765 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:41,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 3216 transitions. [2021-08-12 19:43:41,407 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 3216 transitions. Word has length 25 [2021-08-12 19:43:41,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:41,407 INFO L482 AbstractCegarLoop]: Abstraction has 766 states and 3216 transitions. [2021-08-12 19:43:41,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:41,407 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 3216 transitions. [2021-08-12 19:43:41,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:43:41,408 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:41,408 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:41,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-08-12 19:43:41,612 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:41,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:41,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1293460578, now seen corresponding path program 48 times [2021-08-12 19:43:41,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:41,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399209030] [2021-08-12 19:43:41,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:41,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:41,774 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:41,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:41,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399209030] [2021-08-12 19:43:41,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399209030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:41,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867809495] [2021-08-12 19:43:41,774 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:41,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 19:43:41,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:43:41,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 19:43:41,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:42,176 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:42,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867809495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:42,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:42,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:43:42,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369630038] [2021-08-12 19:43:42,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:43:42,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:42,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:43:42,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:43:42,177 INFO L87 Difference]: Start difference. First operand 766 states and 3216 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:42,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:42,730 INFO L93 Difference]: Finished difference Result 819 states and 3364 transitions. [2021-08-12 19:43:42,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:43:42,730 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:43:42,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:42,733 INFO L225 Difference]: With dead ends: 819 [2021-08-12 19:43:42,733 INFO L226 Difference]: Without dead ends: 808 [2021-08-12 19:43:42,734 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 573.4ms TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:43:42,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2021-08-12 19:43:42,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 774. [2021-08-12 19:43:42,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 4.186287192755498) internal successors, (3236), 773 states have internal predecessors, (3236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:42,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 3236 transitions. [2021-08-12 19:43:42,829 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 3236 transitions. Word has length 25 [2021-08-12 19:43:42,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:42,829 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 3236 transitions. [2021-08-12 19:43:42,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:42,829 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 3236 transitions. [2021-08-12 19:43:42,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:43:42,830 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:42,830 INFO L550 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:43,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-08-12 19:43:43,031 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:43,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:43,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1871613760, now seen corresponding path program 49 times [2021-08-12 19:43:43,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:43,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342896561] [2021-08-12 19:43:43,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:43,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:43,106 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 19:43:43,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:43,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342896561] [2021-08-12 19:43:43,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342896561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:43,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900122362] [2021-08-12 19:43:43,106 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:43,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:43,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:43:43,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:43,271 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 [2021-08-12 19:43:43,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:43:43,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-12 19:43:43,275 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:43:43,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:43:43,299 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. [2021-08-12 19:43:43,299 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:81, output treesize:67 [2021-08-12 19:43:43,433 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 19:43:43,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900122362] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:43,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:43,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-08-12 19:43:43,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095886984] [2021-08-12 19:43:43,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:43:43,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:43,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:43:43,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:43:43,434 INFO L87 Difference]: Start difference. First operand 774 states and 3236 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:44,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:44,010 INFO L93 Difference]: Finished difference Result 1023 states and 4037 transitions. [2021-08-12 19:43:44,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:43:44,010 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:43:44,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:44,014 INFO L225 Difference]: With dead ends: 1023 [2021-08-12 19:43:44,014 INFO L226 Difference]: Without dead ends: 865 [2021-08-12 19:43:44,014 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 351.2ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:43:44,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2021-08-12 19:43:44,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 778. [2021-08-12 19:43:44,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 777 states have (on average 4.175032175032175) internal successors, (3244), 777 states have internal predecessors, (3244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:44,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 3244 transitions. [2021-08-12 19:43:44,111 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 3244 transitions. Word has length 25 [2021-08-12 19:43:44,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:44,111 INFO L482 AbstractCegarLoop]: Abstraction has 778 states and 3244 transitions. [2021-08-12 19:43:44,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:44,111 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 3244 transitions. [2021-08-12 19:43:44,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:43:44,114 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:44,114 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:44,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:44,315 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:44,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:44,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1099408196, now seen corresponding path program 50 times [2021-08-12 19:43:44,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:44,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838012438] [2021-08-12 19:43:44,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:44,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:44,477 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:44,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:44,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838012438] [2021-08-12 19:43:44,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838012438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:44,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174790510] [2021-08-12 19:43:44,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:44,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:43:44,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:43:44,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:43:44,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:45,020 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:45,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174790510] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:45,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:45,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:43:45,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864911176] [2021-08-12 19:43:45,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:43:45,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:45,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:43:45,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:43:45,021 INFO L87 Difference]: Start difference. First operand 778 states and 3244 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:45,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:45,679 INFO L93 Difference]: Finished difference Result 827 states and 3384 transitions. [2021-08-12 19:43:45,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:43:45,680 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:43:45,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:45,683 INFO L225 Difference]: With dead ends: 827 [2021-08-12 19:43:45,684 INFO L226 Difference]: Without dead ends: 816 [2021-08-12 19:43:45,684 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 789.5ms TimeCoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:43:45,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2021-08-12 19:43:45,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 786. [2021-08-12 19:43:45,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 4.15796178343949) internal successors, (3264), 785 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:45,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 3264 transitions. [2021-08-12 19:43:45,784 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 3264 transitions. Word has length 25 [2021-08-12 19:43:45,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:45,784 INFO L482 AbstractCegarLoop]: Abstraction has 786 states and 3264 transitions. [2021-08-12 19:43:45,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:45,784 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 3264 transitions. [2021-08-12 19:43:45,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:43:45,785 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:45,785 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:45,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:45,986 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:45,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:45,986 INFO L82 PathProgramCache]: Analyzing trace with hash 213609916, now seen corresponding path program 51 times [2021-08-12 19:43:45,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:45,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003215091] [2021-08-12 19:43:45,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:46,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:46,201 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:46,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:46,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003215091] [2021-08-12 19:43:46,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003215091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:46,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027111890] [2021-08-12 19:43:46,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:46,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 19:43:46,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:43:46,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 19:43:46,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:46,811 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:46,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027111890] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:46,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:46,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:43:46,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518207043] [2021-08-12 19:43:46,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:43:46,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:46,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:43:46,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:43:46,812 INFO L87 Difference]: Start difference. First operand 786 states and 3264 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:47,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:47,528 INFO L93 Difference]: Finished difference Result 835 states and 3404 transitions. [2021-08-12 19:43:47,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:43:47,528 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:43:47,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:47,531 INFO L225 Difference]: With dead ends: 835 [2021-08-12 19:43:47,532 INFO L226 Difference]: Without dead ends: 824 [2021-08-12 19:43:47,532 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 926.2ms TimeCoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:43:47,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2021-08-12 19:43:47,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 786. [2021-08-12 19:43:47,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 4.15796178343949) internal successors, (3264), 785 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:47,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 3264 transitions. [2021-08-12 19:43:47,630 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 3264 transitions. Word has length 25 [2021-08-12 19:43:47,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:47,630 INFO L482 AbstractCegarLoop]: Abstraction has 786 states and 3264 transitions. [2021-08-12 19:43:47,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:47,630 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 3264 transitions. [2021-08-12 19:43:47,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:43:47,632 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:47,632 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:47,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-08-12 19:43:47,832 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:47,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:47,832 INFO L82 PathProgramCache]: Analyzing trace with hash 616680640, now seen corresponding path program 52 times [2021-08-12 19:43:47,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:47,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691216985] [2021-08-12 19:43:47,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:47,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:47,982 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:47,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:47,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691216985] [2021-08-12 19:43:47,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691216985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:47,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616768318] [2021-08-12 19:43:47,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:48,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:43:48,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:43:48,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 19:43:48,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:48,328 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:48,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616768318] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:48,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:48,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:43:48,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004695750] [2021-08-12 19:43:48,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:43:48,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:48,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:43:48,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:43:48,329 INFO L87 Difference]: Start difference. First operand 786 states and 3264 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:48,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:48,813 INFO L93 Difference]: Finished difference Result 862 states and 3506 transitions. [2021-08-12 19:43:48,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:43:48,814 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:43:48,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:48,818 INFO L225 Difference]: With dead ends: 862 [2021-08-12 19:43:48,818 INFO L226 Difference]: Without dead ends: 846 [2021-08-12 19:43:48,818 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 476.8ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:43:48,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2021-08-12 19:43:48,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 803. [2021-08-12 19:43:48,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 4.139650872817955) internal successors, (3320), 802 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:48,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 3320 transitions. [2021-08-12 19:43:48,922 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 3320 transitions. Word has length 25 [2021-08-12 19:43:48,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:48,922 INFO L482 AbstractCegarLoop]: Abstraction has 803 states and 3320 transitions. [2021-08-12 19:43:48,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:48,922 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 3320 transitions. [2021-08-12 19:43:48,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:43:48,923 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:48,923 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:49,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:49,124 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:49,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:49,124 INFO L82 PathProgramCache]: Analyzing trace with hash -691603366, now seen corresponding path program 53 times [2021-08-12 19:43:49,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:49,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499081564] [2021-08-12 19:43:49,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:49,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:49,268 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:49,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:49,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499081564] [2021-08-12 19:43:49,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499081564] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:49,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471971153] [2021-08-12 19:43:49,268 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:49,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 19:43:49,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:43:49,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 19:43:49,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:49,700 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:49,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471971153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:49,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:49,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:43:49,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928510548] [2021-08-12 19:43:49,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:43:49,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:49,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:43:49,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:43:49,701 INFO L87 Difference]: Start difference. First operand 803 states and 3320 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:50,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:50,104 INFO L93 Difference]: Finished difference Result 848 states and 3448 transitions. [2021-08-12 19:43:50,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:43:50,104 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:43:50,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:50,108 INFO L225 Difference]: With dead ends: 848 [2021-08-12 19:43:50,108 INFO L226 Difference]: Without dead ends: 837 [2021-08-12 19:43:50,108 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 441.3ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:43:50,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2021-08-12 19:43:50,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 799. [2021-08-12 19:43:50,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 4.145363408521304) internal successors, (3308), 798 states have internal predecessors, (3308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:50,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 3308 transitions. [2021-08-12 19:43:50,212 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 3308 transitions. Word has length 25 [2021-08-12 19:43:50,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:50,213 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 3308 transitions. [2021-08-12 19:43:50,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:50,213 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 3308 transitions. [2021-08-12 19:43:50,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:43:50,214 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:50,214 INFO L550 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:50,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:50,414 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:50,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:50,415 INFO L82 PathProgramCache]: Analyzing trace with hash 905805466, now seen corresponding path program 54 times [2021-08-12 19:43:50,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:50,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436266604] [2021-08-12 19:43:50,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:50,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:50,478 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:43:50,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:50,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436266604] [2021-08-12 19:43:50,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436266604] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:50,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810526577] [2021-08-12 19:43:50,478 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:50,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:43:50,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:43:50,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:43:50,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:50,680 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 [2021-08-12 19:43:50,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:43:50,683 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 [2021-08-12 19:43:50,684 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:43:50,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:43:50,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-08-12 19:43:50,720 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:105, output treesize:91 [2021-08-12 19:43:50,927 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:43:50,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810526577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:50,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:50,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-08-12 19:43:50,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537456260] [2021-08-12 19:43:50,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:43:50,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:50,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:43:50,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:43:50,928 INFO L87 Difference]: Start difference. First operand 799 states and 3308 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:51,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:51,496 INFO L93 Difference]: Finished difference Result 1194 states and 5017 transitions. [2021-08-12 19:43:51,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:43:51,496 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:43:51,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:51,501 INFO L225 Difference]: With dead ends: 1194 [2021-08-12 19:43:51,501 INFO L226 Difference]: Without dead ends: 826 [2021-08-12 19:43:51,501 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 368.4ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:43:51,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-08-12 19:43:51,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 791. [2021-08-12 19:43:51,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 4.111392405063291) internal successors, (3248), 790 states have internal predecessors, (3248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:51,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 3248 transitions. [2021-08-12 19:43:51,606 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 3248 transitions. Word has length 25 [2021-08-12 19:43:51,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:51,606 INFO L482 AbstractCegarLoop]: Abstraction has 791 states and 3248 transitions. [2021-08-12 19:43:51,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:51,606 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 3248 transitions. [2021-08-12 19:43:51,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:43:51,607 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:51,607 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:51,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-08-12 19:43:51,808 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:51,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:51,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1044989208, now seen corresponding path program 55 times [2021-08-12 19:43:51,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:51,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69093748] [2021-08-12 19:43:51,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:51,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:51,941 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:51,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:51,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69093748] [2021-08-12 19:43:51,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69093748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:51,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546170929] [2021-08-12 19:43:51,942 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:51,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:51,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 19:43:51,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:52,401 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:52,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546170929] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:52,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:52,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:43:52,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102207542] [2021-08-12 19:43:52,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:43:52,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:52,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:43:52,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:43:52,402 INFO L87 Difference]: Start difference. First operand 791 states and 3248 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:52,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:52,955 INFO L93 Difference]: Finished difference Result 836 states and 3376 transitions. [2021-08-12 19:43:52,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:43:52,956 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:43:52,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:52,960 INFO L225 Difference]: With dead ends: 836 [2021-08-12 19:43:52,960 INFO L226 Difference]: Without dead ends: 825 [2021-08-12 19:43:52,961 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 572.3ms TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:43:52,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-08-12 19:43:53,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 803. [2021-08-12 19:43:53,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 4.103491271820449) internal successors, (3291), 802 states have internal predecessors, (3291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:53,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 3291 transitions. [2021-08-12 19:43:53,068 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 3291 transitions. Word has length 25 [2021-08-12 19:43:53,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:53,068 INFO L482 AbstractCegarLoop]: Abstraction has 803 states and 3291 transitions. [2021-08-12 19:43:53,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:53,068 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 3291 transitions. [2021-08-12 19:43:53,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:43:53,069 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:53,070 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:53,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:53,273 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:53,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:53,273 INFO L82 PathProgramCache]: Analyzing trace with hash 200017756, now seen corresponding path program 56 times [2021-08-12 19:43:53,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:53,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358665323] [2021-08-12 19:43:53,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:53,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:53,448 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:53,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:53,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358665323] [2021-08-12 19:43:53,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358665323] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:53,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357178090] [2021-08-12 19:43:53,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:53,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:43:53,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:43:53,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:43:53,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:53,927 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:53,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357178090] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:53,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:53,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:43:53,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777918081] [2021-08-12 19:43:53,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:43:53,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:53,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:43:53,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:43:53,928 INFO L87 Difference]: Start difference. First operand 803 states and 3291 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:54,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:54,454 INFO L93 Difference]: Finished difference Result 844 states and 3407 transitions. [2021-08-12 19:43:54,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:43:54,455 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:43:54,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:54,459 INFO L225 Difference]: With dead ends: 844 [2021-08-12 19:43:54,459 INFO L226 Difference]: Without dead ends: 833 [2021-08-12 19:43:54,459 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 606.4ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:43:54,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2021-08-12 19:43:54,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 799. [2021-08-12 19:43:54,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 4.109022556390977) internal successors, (3279), 798 states have internal predecessors, (3279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:54,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 3279 transitions. [2021-08-12 19:43:54,576 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 3279 transitions. Word has length 25 [2021-08-12 19:43:54,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:54,576 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 3279 transitions. [2021-08-12 19:43:54,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:54,576 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 3279 transitions. [2021-08-12 19:43:54,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:43:54,577 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:54,577 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:54,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:54,783 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:54,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:54,784 INFO L82 PathProgramCache]: Analyzing trace with hash 875475964, now seen corresponding path program 57 times [2021-08-12 19:43:54,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:54,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403739513] [2021-08-12 19:43:54,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:54,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:54,920 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:54,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:54,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403739513] [2021-08-12 19:43:54,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403739513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:54,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360031545] [2021-08-12 19:43:54,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:54,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 19:43:54,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:43:54,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 19:43:54,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:55,384 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:55,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360031545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:55,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:55,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:43:55,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715038761] [2021-08-12 19:43:55,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:43:55,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:55,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:43:55,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:43:55,385 INFO L87 Difference]: Start difference. First operand 799 states and 3279 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:55,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:55,980 INFO L93 Difference]: Finished difference Result 840 states and 3399 transitions. [2021-08-12 19:43:55,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:43:55,981 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:43:55,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:55,985 INFO L225 Difference]: With dead ends: 840 [2021-08-12 19:43:55,985 INFO L226 Difference]: Without dead ends: 829 [2021-08-12 19:43:55,985 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 648.2ms TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:43:55,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2021-08-12 19:43:56,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 791. [2021-08-12 19:43:56,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 4.125316455696202) internal successors, (3259), 790 states have internal predecessors, (3259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:56,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 3259 transitions. [2021-08-12 19:43:56,092 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 3259 transitions. Word has length 25 [2021-08-12 19:43:56,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:56,092 INFO L482 AbstractCegarLoop]: Abstraction has 791 states and 3259 transitions. [2021-08-12 19:43:56,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:56,092 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 3259 transitions. [2021-08-12 19:43:56,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:43:56,094 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:56,094 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:56,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-08-12 19:43:56,299 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:56,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:56,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1303784532, now seen corresponding path program 58 times [2021-08-12 19:43:56,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:56,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457028094] [2021-08-12 19:43:56,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:56,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:56,494 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:56,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:56,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457028094] [2021-08-12 19:43:56,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457028094] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:56,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801668877] [2021-08-12 19:43:56,494 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:56,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:43:56,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:43:56,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 19:43:56,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:56,851 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:56,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801668877] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:56,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:56,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:43:56,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368012713] [2021-08-12 19:43:56,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:43:56,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:56,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:43:56,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:43:56,852 INFO L87 Difference]: Start difference. First operand 791 states and 3259 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:57,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:57,379 INFO L93 Difference]: Finished difference Result 830 states and 3370 transitions. [2021-08-12 19:43:57,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:43:57,379 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:43:57,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:57,383 INFO L225 Difference]: With dead ends: 830 [2021-08-12 19:43:57,383 INFO L226 Difference]: Without dead ends: 819 [2021-08-12 19:43:57,383 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 529.1ms TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:43:57,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2021-08-12 19:43:57,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 785. [2021-08-12 19:43:57,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 4.135204081632653) internal successors, (3242), 784 states have internal predecessors, (3242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:57,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 3242 transitions. [2021-08-12 19:43:57,487 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 3242 transitions. Word has length 25 [2021-08-12 19:43:57,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:57,487 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 3242 transitions. [2021-08-12 19:43:57,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:57,487 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 3242 transitions. [2021-08-12 19:43:57,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:43:57,488 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:57,488 INFO L550 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:57,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:57,689 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:57,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:57,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1856262014, now seen corresponding path program 59 times [2021-08-12 19:43:57,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:57,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955551348] [2021-08-12 19:43:57,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:57,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:57,765 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:57,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:57,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955551348] [2021-08-12 19:43:57,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955551348] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:57,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268531244] [2021-08-12 19:43:57,765 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:57,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:43:57,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:43:57,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 19:43:57,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:57,938 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 [2021-08-12 19:43:57,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:43:57,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-12 19:43:57,942 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:43:57,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:43:57,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-08-12 19:43:57,978 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:105, output treesize:91 [2021-08-12 19:43:58,221 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:43:58,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268531244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:58,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:58,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-08-12 19:43:58,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596824190] [2021-08-12 19:43:58,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:43:58,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:58,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:43:58,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:43:58,222 INFO L87 Difference]: Start difference. First operand 785 states and 3242 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:59,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:59,050 INFO L93 Difference]: Finished difference Result 1679 states and 7030 transitions. [2021-08-12 19:43:59,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:43:59,051 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:43:59,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:59,056 INFO L225 Difference]: With dead ends: 1679 [2021-08-12 19:43:59,056 INFO L226 Difference]: Without dead ends: 1428 [2021-08-12 19:43:59,057 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 402.2ms TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:43:59,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2021-08-12 19:43:59,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1013. [2021-08-12 19:43:59,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 4.450592885375494) internal successors, (4504), 1012 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:59,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 4504 transitions. [2021-08-12 19:43:59,182 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 4504 transitions. Word has length 25 [2021-08-12 19:43:59,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:59,182 INFO L482 AbstractCegarLoop]: Abstraction has 1013 states and 4504 transitions. [2021-08-12 19:43:59,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:59,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 4504 transitions. [2021-08-12 19:43:59,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:43:59,184 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:59,184 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:59,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:59,385 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:59,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:59,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1459349340, now seen corresponding path program 60 times [2021-08-12 19:43:59,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:59,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364627871] [2021-08-12 19:43:59,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:59,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:59,584 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:59,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:59,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364627871] [2021-08-12 19:43:59,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364627871] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:59,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390046406] [2021-08-12 19:43:59,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:59,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 19:43:59,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:43:59,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:43:59,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:44:00,063 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:00,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390046406] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:00,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:44:00,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:44:00,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296343049] [2021-08-12 19:44:00,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:44:00,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:44:00,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:44:00,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:44:00,064 INFO L87 Difference]: Start difference. First operand 1013 states and 4504 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:00,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:44:00,711 INFO L93 Difference]: Finished difference Result 1048 states and 4596 transitions. [2021-08-12 19:44:00,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:44:00,711 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:44:00,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:44:00,716 INFO L225 Difference]: With dead ends: 1048 [2021-08-12 19:44:00,716 INFO L226 Difference]: Without dead ends: 1037 [2021-08-12 19:44:00,716 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 677.4ms TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:44:00,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2021-08-12 19:44:00,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 1020. [2021-08-12 19:44:00,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 1019 states have (on average 4.439646712463199) internal successors, (4524), 1019 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:00,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 4524 transitions. [2021-08-12 19:44:00,838 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 4524 transitions. Word has length 25 [2021-08-12 19:44:00,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:44:00,839 INFO L482 AbstractCegarLoop]: Abstraction has 1020 states and 4524 transitions. [2021-08-12 19:44:00,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:00,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 4524 transitions. [2021-08-12 19:44:00,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:44:00,840 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:44:00,840 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:44:01,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-08-12 19:44:01,041 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:44:01,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:44:01,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1035038104, now seen corresponding path program 61 times [2021-08-12 19:44:01,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:44:01,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710202646] [2021-08-12 19:44:01,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:44:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:44:01,182 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:01,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:44:01,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710202646] [2021-08-12 19:44:01,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710202646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:01,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52395070] [2021-08-12 19:44:01,182 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:01,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:44:01,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 19:44:01,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:44:01,707 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:01,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52395070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:01,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:44:01,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:44:01,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198238804] [2021-08-12 19:44:01,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:44:01,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:44:01,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:44:01,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:44:01,708 INFO L87 Difference]: Start difference. First operand 1020 states and 4524 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:02,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:44:02,426 INFO L93 Difference]: Finished difference Result 1061 states and 4644 transitions. [2021-08-12 19:44:02,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:44:02,426 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:44:02,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:44:02,431 INFO L225 Difference]: With dead ends: 1061 [2021-08-12 19:44:02,431 INFO L226 Difference]: Without dead ends: 1050 [2021-08-12 19:44:02,431 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 761.4ms TimeCoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:44:02,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-08-12 19:44:02,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 1023. [2021-08-12 19:44:02,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 4.448140900195694) internal successors, (4546), 1022 states have internal predecessors, (4546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:02,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 4546 transitions. [2021-08-12 19:44:02,550 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 4546 transitions. Word has length 25 [2021-08-12 19:44:02,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:44:02,551 INFO L482 AbstractCegarLoop]: Abstraction has 1023 states and 4546 transitions. [2021-08-12 19:44:02,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:02,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 4546 transitions. [2021-08-12 19:44:02,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:44:02,552 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:44:02,552 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:44:02,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:02,753 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:44:02,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:44:02,753 INFO L82 PathProgramCache]: Analyzing trace with hash 190066652, now seen corresponding path program 62 times [2021-08-12 19:44:02,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:44:02,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508876272] [2021-08-12 19:44:02,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:44:02,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:44:02,926 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:02,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:44:02,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508876272] [2021-08-12 19:44:02,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508876272] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:02,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115358877] [2021-08-12 19:44:02,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:02,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:44:02,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:44:02,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:44:02,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:44:03,491 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:03,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115358877] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:03,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:44:03,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:44:03,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178271577] [2021-08-12 19:44:03,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:44:03,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:44:03,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:44:03,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:44:03,492 INFO L87 Difference]: Start difference. First operand 1023 states and 4546 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:04,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:44:04,088 INFO L93 Difference]: Finished difference Result 1066 states and 4665 transitions. [2021-08-12 19:44:04,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:44:04,089 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:44:04,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:44:04,093 INFO L225 Difference]: With dead ends: 1066 [2021-08-12 19:44:04,093 INFO L226 Difference]: Without dead ends: 1055 [2021-08-12 19:44:04,094 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 728.7ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:44:04,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2021-08-12 19:44:04,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 1017. [2021-08-12 19:44:04,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1016 states have (on average 4.457677165354331) internal successors, (4529), 1016 states have internal predecessors, (4529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:04,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 4529 transitions. [2021-08-12 19:44:04,213 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 4529 transitions. Word has length 25 [2021-08-12 19:44:04,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:44:04,213 INFO L482 AbstractCegarLoop]: Abstraction has 1017 states and 4529 transitions. [2021-08-12 19:44:04,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:04,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 4529 transitions. [2021-08-12 19:44:04,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:44:04,214 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:44:04,215 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:44:04,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:04,421 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:44:04,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:44:04,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1860740126, now seen corresponding path program 63 times [2021-08-12 19:44:04,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:44:04,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248644147] [2021-08-12 19:44:04,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:44:04,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:44:04,571 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:04,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:44:04,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248644147] [2021-08-12 19:44:04,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248644147] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:04,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491032183] [2021-08-12 19:44:04,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:04,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 19:44:04,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:44:04,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:44:04,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:44:05,146 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:05,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491032183] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:05,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:44:05,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:44:05,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919047904] [2021-08-12 19:44:05,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:44:05,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:44:05,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:44:05,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:44:05,147 INFO L87 Difference]: Start difference. First operand 1017 states and 4529 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:05,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:44:05,966 INFO L93 Difference]: Finished difference Result 1056 states and 4616 transitions. [2021-08-12 19:44:05,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:44:05,967 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:44:05,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:44:05,972 INFO L225 Difference]: With dead ends: 1056 [2021-08-12 19:44:05,972 INFO L226 Difference]: Without dead ends: 1041 [2021-08-12 19:44:05,972 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 895.1ms TimeCoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:44:05,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2021-08-12 19:44:06,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 1011. [2021-08-12 19:44:06,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 1010 states have (on average 4.461386138613862) internal successors, (4506), 1010 states have internal predecessors, (4506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:06,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 4506 transitions. [2021-08-12 19:44:06,090 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 4506 transitions. Word has length 25 [2021-08-12 19:44:06,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:44:06,090 INFO L482 AbstractCegarLoop]: Abstraction has 1011 states and 4506 transitions. [2021-08-12 19:44:06,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:06,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 4506 transitions. [2021-08-12 19:44:06,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:44:06,092 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:44:06,092 INFO L550 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:44:06,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-08-12 19:44:06,292 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:44:06,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:44:06,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1856073988, now seen corresponding path program 64 times [2021-08-12 19:44:06,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:44:06,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86802306] [2021-08-12 19:44:06,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:44:06,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:44:06,393 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:44:06,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:44:06,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86802306] [2021-08-12 19:44:06,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86802306] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:06,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204542501] [2021-08-12 19:44:06,393 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:06,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:44:06,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:44:06,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:44:06,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:44:06,553 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 [2021-08-12 19:44:06,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:44:06,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-12 19:44:06,557 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:44:06,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:44:06,581 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. [2021-08-12 19:44:06,581 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:81, output treesize:67 [2021-08-12 19:44:06,709 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:44:06,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204542501] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:06,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:44:06,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2021-08-12 19:44:06,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915042061] [2021-08-12 19:44:06,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:44:06,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:44:06,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:44:06,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:44:06,710 INFO L87 Difference]: Start difference. First operand 1011 states and 4506 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:07,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:44:07,433 INFO L93 Difference]: Finished difference Result 1487 states and 6270 transitions. [2021-08-12 19:44:07,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:44:07,437 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:44:07,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:44:07,443 INFO L225 Difference]: With dead ends: 1487 [2021-08-12 19:44:07,443 INFO L226 Difference]: Without dead ends: 1094 [2021-08-12 19:44:07,444 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 425.2ms TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:44:07,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2021-08-12 19:44:07,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 976. [2021-08-12 19:44:07,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 975 states have (on average 4.441025641025641) internal successors, (4330), 975 states have internal predecessors, (4330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:07,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 4330 transitions. [2021-08-12 19:44:07,575 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 4330 transitions. Word has length 25 [2021-08-12 19:44:07,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:44:07,575 INFO L482 AbstractCegarLoop]: Abstraction has 976 states and 4330 transitions. [2021-08-12 19:44:07,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:07,575 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 4330 transitions. [2021-08-12 19:44:07,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:44:07,576 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:44:07,576 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:44:07,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2021-08-12 19:44:07,777 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:44:07,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:44:07,777 INFO L82 PathProgramCache]: Analyzing trace with hash 532128648, now seen corresponding path program 65 times [2021-08-12 19:44:07,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:44:07,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361513139] [2021-08-12 19:44:07,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:44:07,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:44:07,948 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:07,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:44:07,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361513139] [2021-08-12 19:44:07,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361513139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:07,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791870618] [2021-08-12 19:44:07,948 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:07,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:44:07,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:44:07,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 19:44:07,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:44:08,480 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:08,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791870618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:08,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:44:08,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:44:08,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665602386] [2021-08-12 19:44:08,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:44:08,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:44:08,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:44:08,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:44:08,481 INFO L87 Difference]: Start difference. First operand 976 states and 4330 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:09,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:44:09,284 INFO L93 Difference]: Finished difference Result 1035 states and 4493 transitions. [2021-08-12 19:44:09,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:44:09,284 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:44:09,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:44:09,289 INFO L225 Difference]: With dead ends: 1035 [2021-08-12 19:44:09,289 INFO L226 Difference]: Without dead ends: 1024 [2021-08-12 19:44:09,289 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 860.9ms TimeCoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:44:09,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2021-08-12 19:44:09,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 980. [2021-08-12 19:44:09,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 979 states have (on average 4.435137895812053) internal successors, (4342), 979 states have internal predecessors, (4342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:09,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 4342 transitions. [2021-08-12 19:44:09,407 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 4342 transitions. Word has length 25 [2021-08-12 19:44:09,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:44:09,407 INFO L482 AbstractCegarLoop]: Abstraction has 980 states and 4342 transitions. [2021-08-12 19:44:09,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:09,407 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 4342 transitions. [2021-08-12 19:44:09,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:44:09,409 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:44:09,409 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:44:09,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2021-08-12 19:44:09,610 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:44:09,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:44:09,610 INFO L82 PathProgramCache]: Analyzing trace with hash -353669632, now seen corresponding path program 66 times [2021-08-12 19:44:09,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:44:09,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224900585] [2021-08-12 19:44:09,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:44:09,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:44:09,732 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:09,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:44:09,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224900585] [2021-08-12 19:44:09,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224900585] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:09,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619201088] [2021-08-12 19:44:09,732 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:09,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:44:09,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:44:09,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 19:44:09,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:44:10,318 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:10,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619201088] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:10,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:44:10,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:44:10,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982119223] [2021-08-12 19:44:10,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:44:10,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:44:10,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:44:10,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:44:10,319 INFO L87 Difference]: Start difference. First operand 980 states and 4342 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:10,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:44:10,905 INFO L93 Difference]: Finished difference Result 1035 states and 4493 transitions. [2021-08-12 19:44:10,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:44:10,905 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:44:10,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:44:10,910 INFO L225 Difference]: With dead ends: 1035 [2021-08-12 19:44:10,910 INFO L226 Difference]: Without dead ends: 1024 [2021-08-12 19:44:10,910 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 709.6ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:44:10,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2021-08-12 19:44:11,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 974. [2021-08-12 19:44:11,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 973 states have (on average 4.445015416238438) internal successors, (4325), 973 states have internal predecessors, (4325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:11,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 4325 transitions. [2021-08-12 19:44:11,033 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 4325 transitions. Word has length 25 [2021-08-12 19:44:11,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:44:11,033 INFO L482 AbstractCegarLoop]: Abstraction has 974 states and 4325 transitions. [2021-08-12 19:44:11,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:11,034 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 4325 transitions. [2021-08-12 19:44:11,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:44:11,035 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:44:11,035 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:44:11,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:11,235 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:44:11,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:44:11,236 INFO L82 PathProgramCache]: Analyzing trace with hash 49401092, now seen corresponding path program 67 times [2021-08-12 19:44:11,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:44:11,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455367375] [2021-08-12 19:44:11,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:44:11,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:44:11,386 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:11,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:44:11,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455367375] [2021-08-12 19:44:11,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455367375] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:11,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566344169] [2021-08-12 19:44:11,387 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:11,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:44:11,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 19:44:11,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:44:11,745 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:11,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566344169] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:11,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:44:11,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:44:11,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251420271] [2021-08-12 19:44:11,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:44:11,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:44:11,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:44:11,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:44:11,746 INFO L87 Difference]: Start difference. First operand 974 states and 4325 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:12,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:44:12,353 INFO L93 Difference]: Finished difference Result 1019 states and 4453 transitions. [2021-08-12 19:44:12,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:44:12,354 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:44:12,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:44:12,358 INFO L225 Difference]: With dead ends: 1019 [2021-08-12 19:44:12,359 INFO L226 Difference]: Without dead ends: 1008 [2021-08-12 19:44:12,359 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 577.9ms TimeCoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:44:12,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2021-08-12 19:44:12,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 974. [2021-08-12 19:44:12,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 973 states have (on average 4.445015416238438) internal successors, (4325), 973 states have internal predecessors, (4325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:12,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 4325 transitions. [2021-08-12 19:44:12,476 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 4325 transitions. Word has length 25 [2021-08-12 19:44:12,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:44:12,476 INFO L482 AbstractCegarLoop]: Abstraction has 974 states and 4325 transitions. [2021-08-12 19:44:12,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:12,477 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 4325 transitions. [2021-08-12 19:44:12,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:44:12,478 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:44:12,478 INFO L550 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:44:12,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:12,678 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:44:12,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:44:12,679 INFO L82 PathProgramCache]: Analyzing trace with hash -234168990, now seen corresponding path program 68 times [2021-08-12 19:44:12,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:44:12,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355968768] [2021-08-12 19:44:12,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:44:12,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:44:12,747 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:44:12,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:44:12,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355968768] [2021-08-12 19:44:12,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355968768] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:12,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318791746] [2021-08-12 19:44:12,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:12,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:44:12,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:44:12,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 19:44:12,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:44:13,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-12 19:44:13,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:44:13,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-12 19:44:13,055 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:44:13,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:44:13,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-08-12 19:44:13,094 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:119, output treesize:105 [2021-08-12 19:44:13,205 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:44:13,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318791746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:13,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:44:13,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-08-12 19:44:13,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649572365] [2021-08-12 19:44:13,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:44:13,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:44:13,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:44:13,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:44:13,206 INFO L87 Difference]: Start difference. First operand 974 states and 4325 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:16,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:44:16,170 INFO L93 Difference]: Finished difference Result 2441 states and 10591 transitions. [2021-08-12 19:44:16,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:44:16,170 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:44:16,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:44:16,177 INFO L225 Difference]: With dead ends: 2441 [2021-08-12 19:44:16,177 INFO L226 Difference]: Without dead ends: 2008 [2021-08-12 19:44:16,177 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 419.7ms TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:44:16,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2008 states. [2021-08-12 19:44:16,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2008 to 1253. [2021-08-12 19:44:16,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 1252 states have (on average 4.634984025559105) internal successors, (5803), 1252 states have internal predecessors, (5803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:16,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 5803 transitions. [2021-08-12 19:44:16,325 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 5803 transitions. Word has length 25 [2021-08-12 19:44:16,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:44:16,325 INFO L482 AbstractCegarLoop]: Abstraction has 1253 states and 5803 transitions. [2021-08-12 19:44:16,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:16,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 5803 transitions. [2021-08-12 19:44:16,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:44:16,327 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:44:16,327 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:44:16,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2021-08-12 19:44:16,527 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:44:16,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:44:16,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1258882914, now seen corresponding path program 69 times [2021-08-12 19:44:16,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:44:16,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319994323] [2021-08-12 19:44:16,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:44:16,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:44:16,683 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:16,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:44:16,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319994323] [2021-08-12 19:44:16,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319994323] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:16,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471292756] [2021-08-12 19:44:16,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:16,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:44:16,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:44:16,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 19:44:16,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:44:17,148 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:17,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471292756] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:17,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:44:17,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:44:17,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413204573] [2021-08-12 19:44:17,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:44:17,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:44:17,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:44:17,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:44:17,149 INFO L87 Difference]: Start difference. First operand 1253 states and 5803 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:17,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:44:17,864 INFO L93 Difference]: Finished difference Result 1302 states and 5929 transitions. [2021-08-12 19:44:17,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:44:17,864 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:44:17,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:44:17,869 INFO L225 Difference]: With dead ends: 1302 [2021-08-12 19:44:17,869 INFO L226 Difference]: Without dead ends: 1285 [2021-08-12 19:44:17,870 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 647.5ms TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:44:17,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2021-08-12 19:44:18,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1257. [2021-08-12 19:44:18,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1256 states have (on average 4.629777070063694) internal successors, (5815), 1256 states have internal predecessors, (5815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:18,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 5815 transitions. [2021-08-12 19:44:18,013 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 5815 transitions. Word has length 25 [2021-08-12 19:44:18,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:44:18,013 INFO L482 AbstractCegarLoop]: Abstraction has 1257 states and 5815 transitions. [2021-08-12 19:44:18,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:18,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 5815 transitions. [2021-08-12 19:44:18,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:44:18,015 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:44:18,015 INFO L550 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:44:18,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:18,225 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:44:18,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:44:18,225 INFO L82 PathProgramCache]: Analyzing trace with hash 338525918, now seen corresponding path program 70 times [2021-08-12 19:44:18,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:44:18,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666348637] [2021-08-12 19:44:18,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:44:18,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:44:18,320 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:44:18,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:44:18,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666348637] [2021-08-12 19:44:18,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666348637] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:18,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877567506] [2021-08-12 19:44:18,320 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:18,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:44:18,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:44:18,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:44:18,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:44:18,522 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 [2021-08-12 19:44:18,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:44:18,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-12 19:44:18,526 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:44:18,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:44:18,550 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. [2021-08-12 19:44:18,550 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:81, output treesize:67 [2021-08-12 19:44:18,675 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:18,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877567506] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:18,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:44:18,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-08-12 19:44:18,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624081852] [2021-08-12 19:44:18,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:44:18,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:44:18,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:44:18,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:44:18,675 INFO L87 Difference]: Start difference. First operand 1257 states and 5815 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:19,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:44:19,307 INFO L93 Difference]: Finished difference Result 1535 states and 6970 transitions. [2021-08-12 19:44:19,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:44:19,308 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:44:19,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:44:19,313 INFO L225 Difference]: With dead ends: 1535 [2021-08-12 19:44:19,313 INFO L226 Difference]: Without dead ends: 1276 [2021-08-12 19:44:19,313 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 447.0ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:44:19,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-08-12 19:44:19,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1251. [2021-08-12 19:44:19,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1250 states have (on average 4.6256) internal successors, (5782), 1250 states have internal predecessors, (5782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:19,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 5782 transitions. [2021-08-12 19:44:19,455 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 5782 transitions. Word has length 25 [2021-08-12 19:44:19,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:44:19,455 INFO L482 AbstractCegarLoop]: Abstraction has 1251 states and 5782 transitions. [2021-08-12 19:44:19,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:19,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 5782 transitions. [2021-08-12 19:44:19,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:44:19,457 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:44:19,457 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:44:19,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2021-08-12 19:44:19,658 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:44:19,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:44:19,658 INFO L82 PathProgramCache]: Analyzing trace with hash 477709660, now seen corresponding path program 71 times [2021-08-12 19:44:19,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:44:19,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148295251] [2021-08-12 19:44:19,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:44:19,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:44:19,835 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:19,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:44:19,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148295251] [2021-08-12 19:44:19,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148295251] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:19,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140433774] [2021-08-12 19:44:19,836 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:19,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-12 19:44:19,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:44:19,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 19:44:19,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:44:20,287 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:20,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140433774] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:20,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:44:20,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:44:20,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961323939] [2021-08-12 19:44:20,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:44:20,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:44:20,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:44:20,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:44:20,288 INFO L87 Difference]: Start difference. First operand 1251 states and 5782 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:20,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:44:20,934 INFO L93 Difference]: Finished difference Result 1292 states and 5888 transitions. [2021-08-12 19:44:20,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:44:20,934 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:44:20,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:44:20,940 INFO L225 Difference]: With dead ends: 1292 [2021-08-12 19:44:20,940 INFO L226 Difference]: Without dead ends: 1275 [2021-08-12 19:44:20,940 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 622.7ms TimeCoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:44:20,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-08-12 19:44:21,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1249. [2021-08-12 19:44:21,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1248 states have (on average 4.6306089743589745) internal successors, (5779), 1248 states have internal predecessors, (5779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:21,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 5779 transitions. [2021-08-12 19:44:21,083 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 5779 transitions. Word has length 25 [2021-08-12 19:44:21,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:44:21,083 INFO L482 AbstractCegarLoop]: Abstraction has 1249 states and 5779 transitions. [2021-08-12 19:44:21,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:21,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 5779 transitions. [2021-08-12 19:44:21,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:44:21,085 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:44:21,085 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:44:21,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:21,285 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:44:21,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:44:21,286 INFO L82 PathProgramCache]: Analyzing trace with hash -367261792, now seen corresponding path program 72 times [2021-08-12 19:44:21,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:44:21,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180847226] [2021-08-12 19:44:21,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:44:21,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:44:21,412 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:21,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:44:21,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180847226] [2021-08-12 19:44:21,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180847226] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:21,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665439830] [2021-08-12 19:44:21,413 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:21,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 19:44:21,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:44:21,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:44:21,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:44:21,933 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:21,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665439830] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:21,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:44:21,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:44:21,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022589514] [2021-08-12 19:44:21,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:44:21,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:44:21,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:44:21,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:44:21,934 INFO L87 Difference]: Start difference. First operand 1249 states and 5779 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:22,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:44:22,593 INFO L93 Difference]: Finished difference Result 1293 states and 5886 transitions. [2021-08-12 19:44:22,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:44:22,593 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:44:22,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:44:22,599 INFO L225 Difference]: With dead ends: 1293 [2021-08-12 19:44:22,599 INFO L226 Difference]: Without dead ends: 1276 [2021-08-12 19:44:22,599 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 646.3ms TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:44:22,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-08-12 19:44:22,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1240. [2021-08-12 19:44:22,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1239 states have (on average 4.642453591606134) internal successors, (5752), 1239 states have internal predecessors, (5752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:22,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 5752 transitions. [2021-08-12 19:44:22,740 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 5752 transitions. Word has length 25 [2021-08-12 19:44:22,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:44:22,740 INFO L482 AbstractCegarLoop]: Abstraction has 1240 states and 5752 transitions. [2021-08-12 19:44:22,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:22,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 5752 transitions. [2021-08-12 19:44:22,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:44:22,742 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:44:22,742 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:44:22,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable339 [2021-08-12 19:44:22,957 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:44:22,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:44:22,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1601944802, now seen corresponding path program 73 times [2021-08-12 19:44:22,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:44:22,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961900804] [2021-08-12 19:44:22,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:44:22,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:44:23,089 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:23,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:44:23,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961900804] [2021-08-12 19:44:23,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961900804] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:23,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004023608] [2021-08-12 19:44:23,090 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:23,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:44:23,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 19:44:23,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:44:23,620 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:23,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004023608] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:23,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:44:23,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:44:23,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542487983] [2021-08-12 19:44:23,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:44:23,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:44:23,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:44:23,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:44:23,621 INFO L87 Difference]: Start difference. First operand 1240 states and 5752 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:24,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:44:24,466 INFO L93 Difference]: Finished difference Result 1278 states and 5862 transitions. [2021-08-12 19:44:24,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:44:24,467 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:44:24,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:44:24,472 INFO L225 Difference]: With dead ends: 1278 [2021-08-12 19:44:24,472 INFO L226 Difference]: Without dead ends: 1267 [2021-08-12 19:44:24,473 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 825.3ms TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:44:24,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-08-12 19:44:24,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1229. [2021-08-12 19:44:24,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1229 states, 1228 states have (on average 4.662866449511401) internal successors, (5726), 1228 states have internal predecessors, (5726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:24,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 5726 transitions. [2021-08-12 19:44:24,612 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 5726 transitions. Word has length 25 [2021-08-12 19:44:24,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:44:24,612 INFO L482 AbstractCegarLoop]: Abstraction has 1229 states and 5726 transitions. [2021-08-12 19:44:24,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:24,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 5726 transitions. [2021-08-12 19:44:24,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:44:24,614 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:44:24,614 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:44:24,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-08-12 19:44:24,817 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:44:24,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:44:24,817 INFO L82 PathProgramCache]: Analyzing trace with hash 790923972, now seen corresponding path program 74 times [2021-08-12 19:44:24,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:44:24,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509435557] [2021-08-12 19:44:24,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:44:24,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:44:24,970 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:24,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:44:24,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509435557] [2021-08-12 19:44:24,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509435557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:24,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795144373] [2021-08-12 19:44:24,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:25,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:44:25,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:44:25,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:44:25,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:44:25,576 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:25,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795144373] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:25,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:44:25,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:44:25,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215035757] [2021-08-12 19:44:25,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:44:25,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:44:25,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:44:25,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:44:25,577 INFO L87 Difference]: Start difference. First operand 1229 states and 5726 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:26,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:44:26,370 INFO L93 Difference]: Finished difference Result 1276 states and 5852 transitions. [2021-08-12 19:44:26,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:44:26,370 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:44:26,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:44:26,376 INFO L225 Difference]: With dead ends: 1276 [2021-08-12 19:44:26,376 INFO L226 Difference]: Without dead ends: 1265 [2021-08-12 19:44:26,377 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 861.7ms TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:44:26,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2021-08-12 19:44:26,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 1221. [2021-08-12 19:44:26,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1220 states have (on average 4.677049180327868) internal successors, (5706), 1220 states have internal predecessors, (5706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:26,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 5706 transitions. [2021-08-12 19:44:26,516 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 5706 transitions. Word has length 25 [2021-08-12 19:44:26,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:44:26,516 INFO L482 AbstractCegarLoop]: Abstraction has 1221 states and 5706 transitions. [2021-08-12 19:44:26,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:26,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 5706 transitions. [2021-08-12 19:44:26,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:44:26,518 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:44:26,518 INFO L550 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:44:26,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-08-12 19:44:26,736 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:44:26,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:44:26,737 INFO L82 PathProgramCache]: Analyzing trace with hash -94874308, now seen corresponding path program 75 times [2021-08-12 19:44:26,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:44:26,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281364442] [2021-08-12 19:44:26,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:44:26,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:44:26,877 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:26,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:44:26,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281364442] [2021-08-12 19:44:26,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281364442] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:26,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117205214] [2021-08-12 19:44:26,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:26,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:44:26,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:44:26,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 19:44:26,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:44:27,535 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:27,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117205214] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:27,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:44:27,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-12 19:44:27,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653886266] [2021-08-12 19:44:27,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:44:27,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:44:27,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:44:27,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:44:27,536 INFO L87 Difference]: Start difference. First operand 1221 states and 5706 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:28,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:44:28,365 INFO L93 Difference]: Finished difference Result 1268 states and 5832 transitions. [2021-08-12 19:44:28,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:44:28,365 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:44:28,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:44:28,371 INFO L225 Difference]: With dead ends: 1268 [2021-08-12 19:44:28,371 INFO L226 Difference]: Without dead ends: 1257 [2021-08-12 19:44:28,371 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 891.9ms TimeCoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:44:28,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2021-08-12 19:44:28,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 1203. [2021-08-12 19:44:28,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1202 states have (on average 4.70216306156406) internal successors, (5652), 1202 states have internal predecessors, (5652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:28,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 5652 transitions. [2021-08-12 19:44:28,509 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 5652 transitions. Word has length 25 [2021-08-12 19:44:28,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:44:28,509 INFO L482 AbstractCegarLoop]: Abstraction has 1203 states and 5652 transitions. [2021-08-12 19:44:28,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:28,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 5652 transitions. [2021-08-12 19:44:28,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:44:28,511 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:44:28,511 INFO L550 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:44:28,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable355,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:28,711 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:44:28,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:44:28,712 INFO L82 PathProgramCache]: Analyzing trace with hash -945147981, now seen corresponding path program 76 times [2021-08-12 19:44:28,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:44:28,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280367036] [2021-08-12 19:44:28,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:44:28,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:44:28,842 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:28,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:44:28,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280367036] [2021-08-12 19:44:28,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280367036] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:28,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034203946] [2021-08-12 19:44:28,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:28,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:44:28,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:44:28,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 19:44:28,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:44:29,079 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 [2021-08-12 19:44:29,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:44:29,084 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 [2021-08-12 19:44:29,085 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:44:29,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:44:29,112 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. [2021-08-12 19:44:29,112 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-08-12 19:44:29,210 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:44:29,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034203946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:29,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:44:29,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-08-12 19:44:29,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541545040] [2021-08-12 19:44:29,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:44:29,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:44:29,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:44:29,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:44:29,211 INFO L87 Difference]: Start difference. First operand 1203 states and 5652 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:29,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:44:29,925 INFO L93 Difference]: Finished difference Result 1634 states and 7369 transitions. [2021-08-12 19:44:29,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:44:29,925 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 19:44:29,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:44:29,931 INFO L225 Difference]: With dead ends: 1634 [2021-08-12 19:44:29,931 INFO L226 Difference]: Without dead ends: 1391 [2021-08-12 19:44:29,932 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 493.3ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:44:29,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2021-08-12 19:44:30,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 1239. [2021-08-12 19:44:30,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 4.676090468497577) internal successors, (5789), 1238 states have internal predecessors, (5789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:30,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 5789 transitions. [2021-08-12 19:44:30,074 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 5789 transitions. Word has length 26 [2021-08-12 19:44:30,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:44:30,074 INFO L482 AbstractCegarLoop]: Abstraction has 1239 states and 5789 transitions. [2021-08-12 19:44:30,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:30,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 5789 transitions. [2021-08-12 19:44:30,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:44:30,076 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:44:30,076 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:44:30,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:30,290 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:44:30,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:44:30,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1969861905, now seen corresponding path program 77 times [2021-08-12 19:44:30,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:44:30,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395078344] [2021-08-12 19:44:30,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:44:30,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:44:30,474 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:30,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:44:30,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395078344] [2021-08-12 19:44:30,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395078344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:30,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507658631] [2021-08-12 19:44:30,475 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:30,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 19:44:30,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:44:30,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:44:30,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:44:31,096 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:31,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507658631] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:31,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:44:31,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-12 19:44:31,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106751476] [2021-08-12 19:44:31,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:44:31,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:44:31,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:44:31,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:44:31,097 INFO L87 Difference]: Start difference. First operand 1239 states and 5789 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:31,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:44:31,662 INFO L93 Difference]: Finished difference Result 1288 states and 5930 transitions. [2021-08-12 19:44:31,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:44:31,662 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 19:44:31,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:44:31,670 INFO L225 Difference]: With dead ends: 1288 [2021-08-12 19:44:31,670 INFO L226 Difference]: Without dead ends: 1278 [2021-08-12 19:44:31,670 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 692.9ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:44:31,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2021-08-12 19:44:31,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 1246. [2021-08-12 19:44:31,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 4.674698795180723) internal successors, (5820), 1245 states have internal predecessors, (5820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:31,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 5820 transitions. [2021-08-12 19:44:31,814 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 5820 transitions. Word has length 26 [2021-08-12 19:44:31,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:44:31,814 INFO L482 AbstractCegarLoop]: Abstraction has 1246 states and 5820 transitions. [2021-08-12 19:44:31,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:31,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 5820 transitions. [2021-08-12 19:44:31,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:44:31,816 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:44:31,816 INFO L550 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:44:32,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable365,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:32,017 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:44:32,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:44:32,017 INFO L82 PathProgramCache]: Analyzing trace with hash -615589583, now seen corresponding path program 78 times [2021-08-12 19:44:32,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:44:32,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308473506] [2021-08-12 19:44:32,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:44:32,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:44:32,225 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:32,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:44:32,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308473506] [2021-08-12 19:44:32,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308473506] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:32,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193528548] [2021-08-12 19:44:32,225 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:32,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 19:44:32,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:44:32,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:44:32,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:44:32,500 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 [2021-08-12 19:44:32,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:44:32,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-12 19:44:32,506 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:44:32,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:44:32,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-08-12 19:44:32,548 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:119, output treesize:105 [2021-08-12 19:44:32,654 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:44:32,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193528548] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:32,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:44:32,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-12 19:44:32,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723435386] [2021-08-12 19:44:32,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:44:32,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:44:32,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:44:32,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:44:32,655 INFO L87 Difference]: Start difference. First operand 1246 states and 5820 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:33,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:44:33,601 INFO L93 Difference]: Finished difference Result 1498 states and 6683 transitions. [2021-08-12 19:44:33,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:44:33,601 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 19:44:33,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:44:33,608 INFO L225 Difference]: With dead ends: 1498 [2021-08-12 19:44:33,608 INFO L226 Difference]: Without dead ends: 1341 [2021-08-12 19:44:33,608 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 763.1ms TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:44:33,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2021-08-12 19:44:33,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1247. [2021-08-12 19:44:33,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1247 states, 1246 states have (on average 4.657303370786517) internal successors, (5803), 1246 states have internal predecessors, (5803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:33,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 5803 transitions. [2021-08-12 19:44:33,763 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 5803 transitions. Word has length 26 [2021-08-12 19:44:33,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:44:33,763 INFO L482 AbstractCegarLoop]: Abstraction has 1247 states and 5803 transitions. [2021-08-12 19:44:33,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:33,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 5803 transitions. [2021-08-12 19:44:33,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:44:33,765 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:44:33,765 INFO L550 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:44:33,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:33,966 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:44:33,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:44:33,966 INFO L82 PathProgramCache]: Analyzing trace with hash 219339981, now seen corresponding path program 79 times [2021-08-12 19:44:33,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:44:33,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173540054] [2021-08-12 19:44:33,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:44:33,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:44:34,076 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:44:34,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:44:34,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173540054] [2021-08-12 19:44:34,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173540054] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:34,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987346841] [2021-08-12 19:44:34,076 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:34,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:44:34,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 19:44:34,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:44:34,309 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 [2021-08-12 19:44:34,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:44:34,313 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 [2021-08-12 19:44:34,314 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:44:34,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:44:34,342 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. [2021-08-12 19:44:34,342 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-08-12 19:44:34,434 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 19:44:34,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987346841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:34,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:44:34,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-08-12 19:44:34,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231974115] [2021-08-12 19:44:34,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:44:34,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:44:34,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:44:34,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:44:34,435 INFO L87 Difference]: Start difference. First operand 1247 states and 5803 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:35,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:44:35,679 INFO L93 Difference]: Finished difference Result 3298 states and 15034 transitions. [2021-08-12 19:44:35,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 19:44:35,679 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 19:44:35,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:44:35,688 INFO L225 Difference]: With dead ends: 3298 [2021-08-12 19:44:35,688 INFO L226 Difference]: Without dead ends: 2633 [2021-08-12 19:44:35,689 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 562.2ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:44:35,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2633 states. [2021-08-12 19:44:35,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2633 to 1458. [2021-08-12 19:44:35,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1457 states have (on average 4.881949210706932) internal successors, (7113), 1457 states have internal predecessors, (7113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:35,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 7113 transitions. [2021-08-12 19:44:35,865 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 7113 transitions. Word has length 26 [2021-08-12 19:44:35,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:44:35,865 INFO L482 AbstractCegarLoop]: Abstraction has 1458 states and 7113 transitions. [2021-08-12 19:44:35,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:35,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 7113 transitions. [2021-08-12 19:44:35,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:44:35,867 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:44:35,867 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:44:36,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable374 [2021-08-12 19:44:36,069 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:44:36,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:44:36,069 INFO L82 PathProgramCache]: Analyzing trace with hash -805373943, now seen corresponding path program 80 times [2021-08-12 19:44:36,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:44:36,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948777565] [2021-08-12 19:44:36,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:44:36,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:44:36,262 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:36,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:44:36,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948777565] [2021-08-12 19:44:36,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948777565] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:36,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055623163] [2021-08-12 19:44:36,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:36,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:44:36,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:44:36,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 19:44:36,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:44:36,847 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:36,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055623163] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:36,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:44:36,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-12 19:44:36,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570353534] [2021-08-12 19:44:36,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:44:36,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:44:36,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:44:36,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:44:36,848 INFO L87 Difference]: Start difference. First operand 1458 states and 7113 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:37,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:44:37,821 INFO L93 Difference]: Finished difference Result 1509 states and 7261 transitions. [2021-08-12 19:44:37,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:44:37,821 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 19:44:37,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:44:37,828 INFO L225 Difference]: With dead ends: 1509 [2021-08-12 19:44:37,828 INFO L226 Difference]: Without dead ends: 1499 [2021-08-12 19:44:37,828 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 934.0ms TimeCoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 19:44:37,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1499 states. [2021-08-12 19:44:37,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1499 to 1460. [2021-08-12 19:44:37,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 4.885538039753255) internal successors, (7128), 1459 states have internal predecessors, (7128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:37,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 7128 transitions. [2021-08-12 19:44:38,002 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 7128 transitions. Word has length 26 [2021-08-12 19:44:38,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:44:38,002 INFO L482 AbstractCegarLoop]: Abstraction has 1460 states and 7128 transitions. [2021-08-12 19:44:38,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:38,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 7128 transitions. [2021-08-12 19:44:38,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:44:38,004 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:44:38,004 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:44:38,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-08-12 19:44:38,205 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:44:38,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:44:38,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1799650449, now seen corresponding path program 81 times [2021-08-12 19:44:38,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:44:38,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130003386] [2021-08-12 19:44:38,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:44:38,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:44:38,342 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:38,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:44:38,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130003386] [2021-08-12 19:44:38,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130003386] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:38,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800452573] [2021-08-12 19:44:38,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:38,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 19:44:38,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:44:38,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:44:38,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:44:38,997 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:38,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800452573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:38,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:44:38,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-12 19:44:38,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806892202] [2021-08-12 19:44:38,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:44:38,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:44:38,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:44:38,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:44:38,998 INFO L87 Difference]: Start difference. First operand 1460 states and 7128 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:39,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:44:39,892 INFO L93 Difference]: Finished difference Result 1522 states and 7321 transitions. [2021-08-12 19:44:39,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:44:39,892 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 19:44:39,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:44:39,899 INFO L225 Difference]: With dead ends: 1522 [2021-08-12 19:44:39,899 INFO L226 Difference]: Without dead ends: 1515 [2021-08-12 19:44:39,899 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 860.7ms TimeCoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2021-08-12 19:44:39,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-08-12 19:44:40,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1465. [2021-08-12 19:44:40,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1464 states have (on average 4.8756830601092895) internal successors, (7138), 1464 states have internal predecessors, (7138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:40,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 7138 transitions. [2021-08-12 19:44:40,068 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 7138 transitions. Word has length 26 [2021-08-12 19:44:40,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:44:40,068 INFO L482 AbstractCegarLoop]: Abstraction has 1465 states and 7138 transitions. [2021-08-12 19:44:40,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:40,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 7138 transitions. [2021-08-12 19:44:40,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:44:40,071 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:44:40,071 INFO L550 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:44:40,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:40,271 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:44:40,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:44:40,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1153082439, now seen corresponding path program 82 times [2021-08-12 19:44:40,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:44:40,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042833078] [2021-08-12 19:44:40,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:44:40,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:44:40,349 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:40,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:44:40,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042833078] [2021-08-12 19:44:40,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042833078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:40,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78506837] [2021-08-12 19:44:40,349 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:40,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:44:40,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:44:40,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:44:40,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:44:40,580 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 [2021-08-12 19:44:40,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:44:40,584 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 [2021-08-12 19:44:40,584 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:44:40,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:44:40,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-08-12 19:44:40,630 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:95, output treesize:81 [2021-08-12 19:44:40,725 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:40,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78506837] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:40,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:44:40,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-08-12 19:44:40,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437725292] [2021-08-12 19:44:40,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:44:40,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:44:40,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:44:40,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:44:40,726 INFO L87 Difference]: Start difference. First operand 1465 states and 7138 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:44,981 WARN L205 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-08-12 19:44:47,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:44:47,710 INFO L93 Difference]: Finished difference Result 2378 states and 11286 transitions. [2021-08-12 19:44:47,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:44:47,710 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 19:44:47,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:44:47,717 INFO L225 Difference]: With dead ends: 2378 [2021-08-12 19:44:47,717 INFO L226 Difference]: Without dead ends: 1777 [2021-08-12 19:44:47,718 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 4491.8ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:44:47,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2021-08-12 19:44:47,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1513. [2021-08-12 19:44:47,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1513 states, 1512 states have (on average 4.866402116402116) internal successors, (7358), 1512 states have internal predecessors, (7358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:47,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 7358 transitions. [2021-08-12 19:44:47,899 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 7358 transitions. Word has length 26 [2021-08-12 19:44:47,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:44:47,899 INFO L482 AbstractCegarLoop]: Abstraction has 1513 states and 7358 transitions. [2021-08-12 19:44:47,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:47,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 7358 transitions. [2021-08-12 19:44:47,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:44:47,902 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:44:47,902 INFO L550 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:44:48,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-08-12 19:44:48,118 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:44:48,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:44:48,118 INFO L82 PathProgramCache]: Analyzing trace with hash 532556407, now seen corresponding path program 83 times [2021-08-12 19:44:48,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:44:48,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813456036] [2021-08-12 19:44:48,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:44:48,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:44:48,241 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:44:48,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:44:48,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813456036] [2021-08-12 19:44:48,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813456036] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:48,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222809271] [2021-08-12 19:44:48,241 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:48,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 19:44:48,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:44:48,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 19:44:48,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:44:48,576 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 [2021-08-12 19:44:48,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:44:48,581 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 [2021-08-12 19:44:48,582 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:44:48,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:44:48,662 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 [2021-08-12 19:44:48,663 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:44:48,667 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 [2021-08-12 19:44:48,668 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:44:48,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:44:48,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-08-12 19:44:48,752 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:251, output treesize:223 [2021-08-12 19:44:49,032 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:44:49,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222809271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:49,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:44:49,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-12 19:44:49,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65943865] [2021-08-12 19:44:49,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:44:49,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:44:49,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:44:49,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:44:49,033 INFO L87 Difference]: Start difference. First operand 1513 states and 7358 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:49,520 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 107 [2021-08-12 19:44:50,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:44:50,130 INFO L93 Difference]: Finished difference Result 2591 states and 12071 transitions. [2021-08-12 19:44:50,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:44:50,131 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 19:44:50,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:44:50,138 INFO L225 Difference]: With dead ends: 2591 [2021-08-12 19:44:50,139 INFO L226 Difference]: Without dead ends: 1812 [2021-08-12 19:44:50,140 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 635.5ms TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:44:50,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2021-08-12 19:44:50,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1232. [2021-08-12 19:44:50,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1231 states have (on average 4.560519902518278) internal successors, (5614), 1231 states have internal predecessors, (5614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:50,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 5614 transitions. [2021-08-12 19:44:50,315 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 5614 transitions. Word has length 26 [2021-08-12 19:44:50,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:44:50,316 INFO L482 AbstractCegarLoop]: Abstraction has 1232 states and 5614 transitions. [2021-08-12 19:44:50,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:50,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 5614 transitions. [2021-08-12 19:44:50,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:44:50,318 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:44:50,318 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:44:50,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:50,518 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:44:50,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:44:50,518 INFO L82 PathProgramCache]: Analyzing trace with hash -492157517, now seen corresponding path program 84 times [2021-08-12 19:44:50,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:44:50,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415061945] [2021-08-12 19:44:50,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:44:50,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:44:50,672 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:50,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:44:50,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415061945] [2021-08-12 19:44:50,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415061945] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:50,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844404362] [2021-08-12 19:44:50,673 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:50,711 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 19:44:50,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:44:50,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 19:44:50,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:44:51,157 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:51,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844404362] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:51,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:44:51,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-12 19:44:51,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109056826] [2021-08-12 19:44:51,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:44:51,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:44:51,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:44:51,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:44:51,159 INFO L87 Difference]: Start difference. First operand 1232 states and 5614 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:51,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:44:51,927 INFO L93 Difference]: Finished difference Result 1289 states and 5775 transitions. [2021-08-12 19:44:51,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:44:51,928 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 19:44:51,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:44:51,934 INFO L225 Difference]: With dead ends: 1289 [2021-08-12 19:44:51,934 INFO L226 Difference]: Without dead ends: 1279 [2021-08-12 19:44:51,934 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 622.2ms TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:44:51,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2021-08-12 19:44:52,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1242. [2021-08-12 19:44:52,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1242 states, 1241 states have (on average 4.556809024979855) internal successors, (5655), 1241 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:52,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 5655 transitions. [2021-08-12 19:44:52,109 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 5655 transitions. Word has length 26 [2021-08-12 19:44:52,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:44:52,109 INFO L482 AbstractCegarLoop]: Abstraction has 1242 states and 5655 transitions. [2021-08-12 19:44:52,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:52,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 5655 transitions. [2021-08-12 19:44:52,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:44:52,122 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:44:52,122 INFO L550 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:44:52,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-08-12 19:44:52,325 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:44:52,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:44:52,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1587344779, now seen corresponding path program 85 times [2021-08-12 19:44:52,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:44:52,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004499551] [2021-08-12 19:44:52,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:44:52,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:44:52,447 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:52,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:44:52,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004499551] [2021-08-12 19:44:52,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004499551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:52,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53798523] [2021-08-12 19:44:52,447 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:52,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:44:52,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 19:44:52,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:44:52,684 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 [2021-08-12 19:44:52,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:44:52,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-12 19:44:52,688 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:44:52,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:44:52,717 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. [2021-08-12 19:44:52,717 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-08-12 19:44:52,805 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:44:52,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53798523] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:52,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:44:52,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-08-12 19:44:52,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144553476] [2021-08-12 19:44:52,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:44:52,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:44:52,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:44:52,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:44:52,806 INFO L87 Difference]: Start difference. First operand 1242 states and 5655 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:53,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:44:53,733 INFO L93 Difference]: Finished difference Result 1666 states and 7392 transitions. [2021-08-12 19:44:53,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:44:53,733 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 19:44:53,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:44:53,741 INFO L225 Difference]: With dead ends: 1666 [2021-08-12 19:44:53,741 INFO L226 Difference]: Without dead ends: 1358 [2021-08-12 19:44:53,741 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 577.1ms TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:44:53,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2021-08-12 19:44:53,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 1255. [2021-08-12 19:44:53,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 1254 states have (on average 4.54066985645933) internal successors, (5694), 1254 states have internal predecessors, (5694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:53,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 5694 transitions. [2021-08-12 19:44:53,929 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 5694 transitions. Word has length 26 [2021-08-12 19:44:53,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:44:53,929 INFO L482 AbstractCegarLoop]: Abstraction has 1255 states and 5694 transitions. [2021-08-12 19:44:53,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:53,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 5694 transitions. [2021-08-12 19:44:53,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:44:53,931 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:44:53,931 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:44:54,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable401,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:54,132 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:44:54,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:44:54,132 INFO L82 PathProgramCache]: Analyzing trace with hash 2032815699, now seen corresponding path program 86 times [2021-08-12 19:44:54,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:44:54,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323039429] [2021-08-12 19:44:54,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:44:54,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:44:54,303 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:54,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:44:54,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323039429] [2021-08-12 19:44:54,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323039429] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:54,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696405120] [2021-08-12 19:44:54,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:54,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:44:54,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:44:54,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 19:44:54,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:44:54,846 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:54,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696405120] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:54,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:44:54,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-12 19:44:54,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063995898] [2021-08-12 19:44:54,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:44:54,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:44:54,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:44:54,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:44:54,847 INFO L87 Difference]: Start difference. First operand 1255 states and 5694 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:55,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:44:55,574 INFO L93 Difference]: Finished difference Result 1291 states and 5780 transitions. [2021-08-12 19:44:55,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:44:55,574 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 19:44:55,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:44:55,580 INFO L225 Difference]: With dead ends: 1291 [2021-08-12 19:44:55,581 INFO L226 Difference]: Without dead ends: 1277 [2021-08-12 19:44:55,581 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 682.0ms TimeCoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:44:55,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2021-08-12 19:44:55,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 1252. [2021-08-12 19:44:55,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1252 states, 1251 states have (on average 4.545163868904876) internal successors, (5686), 1251 states have internal predecessors, (5686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:55,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1252 states to 1252 states and 5686 transitions. [2021-08-12 19:44:55,777 INFO L78 Accepts]: Start accepts. Automaton has 1252 states and 5686 transitions. Word has length 26 [2021-08-12 19:44:55,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:44:55,777 INFO L482 AbstractCegarLoop]: Abstraction has 1252 states and 5686 transitions. [2021-08-12 19:44:55,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:55,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1252 states and 5686 transitions. [2021-08-12 19:44:55,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:44:55,779 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:44:55,779 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:44:55,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-08-12 19:44:55,979 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:44:55,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:44:55,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1608504463, now seen corresponding path program 87 times [2021-08-12 19:44:55,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:44:55,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499152052] [2021-08-12 19:44:55,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:44:55,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:44:56,180 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:56,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:44:56,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499152052] [2021-08-12 19:44:56,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499152052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:56,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852231559] [2021-08-12 19:44:56,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:56,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-12 19:44:56,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:44:56,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 19:44:56,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:44:56,853 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:56,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852231559] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:56,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:44:56,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-12 19:44:56,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559504051] [2021-08-12 19:44:56,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:44:56,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:44:56,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:44:56,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:44:56,854 INFO L87 Difference]: Start difference. First operand 1252 states and 5686 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:57,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:44:57,726 INFO L93 Difference]: Finished difference Result 1297 states and 5811 transitions. [2021-08-12 19:44:57,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:44:57,726 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 19:44:57,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:44:57,734 INFO L225 Difference]: With dead ends: 1297 [2021-08-12 19:44:57,734 INFO L226 Difference]: Without dead ends: 1287 [2021-08-12 19:44:57,734 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 839.5ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:44:57,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-08-12 19:44:57,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1254. [2021-08-12 19:44:57,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 1253 states have (on average 4.5474860335195535) internal successors, (5698), 1253 states have internal predecessors, (5698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:57,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 5698 transitions. [2021-08-12 19:44:57,916 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 5698 transitions. Word has length 26 [2021-08-12 19:44:57,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:44:57,916 INFO L482 AbstractCegarLoop]: Abstraction has 1254 states and 5698 transitions. [2021-08-12 19:44:57,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:57,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 5698 transitions. [2021-08-12 19:44:57,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:44:57,918 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:44:57,918 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:44:58,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:58,119 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:44:58,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:44:58,119 INFO L82 PathProgramCache]: Analyzing trace with hash 842661457, now seen corresponding path program 88 times [2021-08-12 19:44:58,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:44:58,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075946273] [2021-08-12 19:44:58,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:44:58,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:44:58,284 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:58,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:44:58,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075946273] [2021-08-12 19:44:58,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075946273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:58,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146198664] [2021-08-12 19:44:58,285 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:58,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:44:58,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:44:58,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:44:58,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:44:58,805 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:58,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146198664] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:58,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:44:58,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-12 19:44:58,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88854740] [2021-08-12 19:44:58,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:44:58,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:44:58,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:44:58,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:44:58,806 INFO L87 Difference]: Start difference. First operand 1254 states and 5698 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:59,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:44:59,578 INFO L93 Difference]: Finished difference Result 1303 states and 5848 transitions. [2021-08-12 19:44:59,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:44:59,579 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 19:44:59,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:44:59,585 INFO L225 Difference]: With dead ends: 1303 [2021-08-12 19:44:59,585 INFO L226 Difference]: Without dead ends: 1296 [2021-08-12 19:44:59,585 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 638.0ms TimeCoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:44:59,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2021-08-12 19:44:59,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 1250. [2021-08-12 19:44:59,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 4.551641313050441) internal successors, (5685), 1249 states have internal predecessors, (5685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:59,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 5685 transitions. [2021-08-12 19:44:59,761 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 5685 transitions. Word has length 26 [2021-08-12 19:44:59,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:44:59,761 INFO L482 AbstractCegarLoop]: Abstraction has 1250 states and 5685 transitions. [2021-08-12 19:44:59,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:59,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 5685 transitions. [2021-08-12 19:44:59,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:44:59,763 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:44:59,763 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:44:59,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-08-12 19:44:59,964 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:44:59,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:44:59,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1059437065, now seen corresponding path program 89 times [2021-08-12 19:44:59,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:44:59,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974167518] [2021-08-12 19:44:59,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:44:59,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:45:00,174 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:45:00,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:45:00,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974167518] [2021-08-12 19:45:00,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974167518] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:45:00,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586514247] [2021-08-12 19:45:00,174 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:45:00,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-12 19:45:00,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:45:00,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 19:45:00,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:45:00,727 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:45:00,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586514247] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:45:00,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:45:00,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-12 19:45:00,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435666158] [2021-08-12 19:45:00,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:45:00,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:45:00,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:45:00,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:45:00,728 INFO L87 Difference]: Start difference. First operand 1250 states and 5685 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:45:01,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:45:01,650 INFO L93 Difference]: Finished difference Result 1391 states and 6094 transitions. [2021-08-12 19:45:01,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:45:01,650 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 19:45:01,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:45:01,657 INFO L225 Difference]: With dead ends: 1391 [2021-08-12 19:45:01,657 INFO L226 Difference]: Without dead ends: 1381 [2021-08-12 19:45:01,657 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 695.7ms TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:45:01,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2021-08-12 19:45:01,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 1243. [2021-08-12 19:45:01,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1243 states, 1242 states have (on average 4.563607085346216) internal successors, (5668), 1242 states have internal predecessors, (5668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:45:01,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 5668 transitions. [2021-08-12 19:45:01,848 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 5668 transitions. Word has length 26 [2021-08-12 19:45:01,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:45:01,849 INFO L482 AbstractCegarLoop]: Abstraction has 1243 states and 5668 transitions. [2021-08-12 19:45:01,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:45:01,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 5668 transitions. [2021-08-12 19:45:01,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:45:01,850 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:45:01,851 INFO L550 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:45:02,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-08-12 19:45:02,051 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:45:02,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:45:02,051 INFO L82 PathProgramCache]: Analyzing trace with hash 2140342969, now seen corresponding path program 90 times [2021-08-12 19:45:02,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:45:02,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615703885] [2021-08-12 19:45:02,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:45:02,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:45:02,159 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:45:02,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:45:02,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615703885] [2021-08-12 19:45:02,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615703885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:45:02,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525588014] [2021-08-12 19:45:02,159 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:45:02,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 19:45:02,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:45:02,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 19:45:02,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:45:02,591 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 [2021-08-12 19:45:02,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:45:02,595 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 [2021-08-12 19:45:02,596 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:45:02,704 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2021-08-12 19:45:02,705 INFO L628 ElimStorePlain]: treesize reduction 14, result has 92.6 percent of original size [2021-08-12 19:45:02,708 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 [2021-08-12 19:45:02,709 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:45:02,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-12 19:45:02,713 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:45:02,770 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.3 percent of original size [2021-08-12 19:45:02,772 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. [2021-08-12 19:45:02,772 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:203, output treesize:73 [2021-08-12 19:45:02,868 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:45:02,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525588014] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:45:02,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:45:02,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-12 19:45:02,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850680479] [2021-08-12 19:45:02,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:45:02,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:45:02,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:45:02,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:45:02,869 INFO L87 Difference]: Start difference. First operand 1243 states and 5668 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:45:03,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:45:03,842 INFO L93 Difference]: Finished difference Result 1539 states and 6831 transitions. [2021-08-12 19:45:03,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:45:03,843 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 19:45:03,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:45:03,849 INFO L225 Difference]: With dead ends: 1539 [2021-08-12 19:45:03,849 INFO L226 Difference]: Without dead ends: 1284 [2021-08-12 19:45:03,849 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 659.0ms TimeCoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:45:03,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2021-08-12 19:45:04,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 1239. [2021-08-12 19:45:04,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 4.554119547657512) internal successors, (5638), 1238 states have internal predecessors, (5638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:45:04,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 5638 transitions. [2021-08-12 19:45:04,028 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 5638 transitions. Word has length 26 [2021-08-12 19:45:04,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:45:04,029 INFO L482 AbstractCegarLoop]: Abstraction has 1239 states and 5638 transitions. [2021-08-12 19:45:04,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:45:04,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 5638 transitions. [2021-08-12 19:45:04,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:45:04,031 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:45:04,031 INFO L550 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:45:04,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:45:04,231 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:45:04,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:45:04,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1627082575, now seen corresponding path program 91 times [2021-08-12 19:45:04,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:45:04,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915594270] [2021-08-12 19:45:04,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:45:04,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:45:04,349 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:45:04,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:45:04,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915594270] [2021-08-12 19:45:04,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915594270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:45:04,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885740567] [2021-08-12 19:45:04,350 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:45:04,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:45:04,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 19:45:04,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:45:04,594 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 [2021-08-12 19:45:04,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:45:04,598 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 [2021-08-12 19:45:04,599 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:45:04,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:45:04,627 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. [2021-08-12 19:45:04,627 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-08-12 19:45:04,715 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:45:04,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885740567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:45:04,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:45:04,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-08-12 19:45:04,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850977360] [2021-08-12 19:45:04,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:45:04,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:45:04,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:45:04,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:45:04,716 INFO L87 Difference]: Start difference. First operand 1239 states and 5638 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:45:05,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:45:05,389 INFO L93 Difference]: Finished difference Result 1489 states and 6654 transitions. [2021-08-12 19:45:05,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:45:05,390 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 19:45:05,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:45:05,395 INFO L225 Difference]: With dead ends: 1489 [2021-08-12 19:45:05,395 INFO L226 Difference]: Without dead ends: 994 [2021-08-12 19:45:05,396 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 459.2ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:45:05,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-08-12 19:45:05,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 974. [2021-08-12 19:45:05,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 973 states have (on average 4.34737923946557) internal successors, (4230), 973 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:45:05,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 4230 transitions. [2021-08-12 19:45:05,552 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 4230 transitions. Word has length 26 [2021-08-12 19:45:05,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:45:05,552 INFO L482 AbstractCegarLoop]: Abstraction has 974 states and 4230 transitions. [2021-08-12 19:45:05,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:45:05,552 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 4230 transitions. [2021-08-12 19:45:05,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:45:05,553 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:45:05,553 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:45:05,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable426,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:45:05,754 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:45:05,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:45:05,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1993077903, now seen corresponding path program 92 times [2021-08-12 19:45:05,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:45:05,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357885792] [2021-08-12 19:45:05,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:45:05,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:45:05,931 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:45:05,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:45:05,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357885792] [2021-08-12 19:45:05,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357885792] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:45:05,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653764930] [2021-08-12 19:45:05,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:45:05,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:45:05,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:45:05,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 19:45:05,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:45:06,567 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:45:06,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653764930] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:45:06,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:45:06,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-12 19:45:06,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424037595] [2021-08-12 19:45:06,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:45:06,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:45:06,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:45:06,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:45:06,568 INFO L87 Difference]: Start difference. First operand 974 states and 4230 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:45:07,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:45:07,614 INFO L93 Difference]: Finished difference Result 1027 states and 4379 transitions. [2021-08-12 19:45:07,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:45:07,615 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 19:45:07,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:45:07,620 INFO L225 Difference]: With dead ends: 1027 [2021-08-12 19:45:07,621 INFO L226 Difference]: Without dead ends: 1017 [2021-08-12 19:45:07,621 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1076.3ms TimeCoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 19:45:07,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2021-08-12 19:45:07,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 986. [2021-08-12 19:45:07,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 4.336040609137056) internal successors, (4271), 985 states have internal predecessors, (4271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:45:07,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 4271 transitions. [2021-08-12 19:45:07,782 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 4271 transitions. Word has length 26 [2021-08-12 19:45:07,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:45:07,783 INFO L482 AbstractCegarLoop]: Abstraction has 986 states and 4271 transitions. [2021-08-12 19:45:07,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:45:07,783 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 4271 transitions. [2021-08-12 19:45:07,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:45:07,784 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:45:07,784 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:45:07,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:45:07,985 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:45:07,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:45:07,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1724331475, now seen corresponding path program 93 times [2021-08-12 19:45:07,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:45:07,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022329696] [2021-08-12 19:45:07,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:45:07,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:45:08,197 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:45:08,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:45:08,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022329696] [2021-08-12 19:45:08,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022329696] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:45:08,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901764853] [2021-08-12 19:45:08,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:45:08,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 19:45:08,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:45:08,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:45:08,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:45:08,782 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:45:08,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901764853] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:45:08,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:45:08,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-12 19:45:08,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154058075] [2021-08-12 19:45:08,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:45:08,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:45:08,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:45:08,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:45:08,783 INFO L87 Difference]: Start difference. First operand 986 states and 4271 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:45:09,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:45:09,563 INFO L93 Difference]: Finished difference Result 1035 states and 4403 transitions. [2021-08-12 19:45:09,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:45:09,563 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 19:45:09,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:45:09,569 INFO L225 Difference]: With dead ends: 1035 [2021-08-12 19:45:09,569 INFO L226 Difference]: Without dead ends: 1025 [2021-08-12 19:45:09,569 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 799.5ms TimeCoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:45:09,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2021-08-12 19:45:09,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 975. [2021-08-12 19:45:09,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 974 states have (on average 4.354209445585216) internal successors, (4241), 974 states have internal predecessors, (4241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:45:09,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 4241 transitions. [2021-08-12 19:45:09,725 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 4241 transitions. Word has length 26 [2021-08-12 19:45:09,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:45:09,725 INFO L482 AbstractCegarLoop]: Abstraction has 975 states and 4241 transitions. [2021-08-12 19:45:09,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:45:09,725 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 4241 transitions. [2021-08-12 19:45:09,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:45:09,727 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:45:09,727 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:45:09,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-08-12 19:45:09,927 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:45:09,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:45:09,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1300020239, now seen corresponding path program 94 times [2021-08-12 19:45:09,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:45:09,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930463888] [2021-08-12 19:45:09,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:45:09,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:45:10,113 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:45:10,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:45:10,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930463888] [2021-08-12 19:45:10,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930463888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:45:10,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052632310] [2021-08-12 19:45:10,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:45:10,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:45:10,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:45:10,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:45:10,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:45:10,743 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:45:10,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052632310] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:45:10,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:45:10,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-12 19:45:10,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884189640] [2021-08-12 19:45:10,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:45:10,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:45:10,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:45:10,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:45:10,744 INFO L87 Difference]: Start difference. First operand 975 states and 4241 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:45:11,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:45:11,466 INFO L93 Difference]: Finished difference Result 1023 states and 4371 transitions. [2021-08-12 19:45:11,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:45:11,466 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 19:45:11,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:45:11,472 INFO L225 Difference]: With dead ends: 1023 [2021-08-12 19:45:11,473 INFO L226 Difference]: Without dead ends: 1013 [2021-08-12 19:45:11,473 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 783.8ms TimeCoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:45:11,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2021-08-12 19:45:11,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 974. [2021-08-12 19:45:11,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 973 states have (on average 4.362795477903392) internal successors, (4245), 973 states have internal predecessors, (4245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:45:11,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 4245 transitions. [2021-08-12 19:45:11,632 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 4245 transitions. Word has length 26 [2021-08-12 19:45:11,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:45:11,633 INFO L482 AbstractCegarLoop]: Abstraction has 974 states and 4245 transitions. [2021-08-12 19:45:11,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:45:11,633 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 4245 transitions. [2021-08-12 19:45:11,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:45:11,634 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:45:11,634 INFO L550 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:45:11,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-08-12 19:45:11,835 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:45:11,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:45:11,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1350944785, now seen corresponding path program 95 times [2021-08-12 19:45:11,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:45:11,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909352012] [2021-08-12 19:45:11,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:45:11,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:45:11,960 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:45:11,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:45:11,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909352012] [2021-08-12 19:45:11,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909352012] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:45:11,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481742205] [2021-08-12 19:45:11,961 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:45:11,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 19:45:11,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:45:12,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:45:12,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:45:12,489 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 [2021-08-12 19:45:12,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:45:12,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-12 19:45:12,493 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:45:12,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:45:12,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-08-12 19:45:12,534 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:119, output treesize:105 [2021-08-12 19:45:12,655 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:45:12,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481742205] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:45:12,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:45:12,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-08-12 19:45:12,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693395677] [2021-08-12 19:45:12,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 19:45:12,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:45:12,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 19:45:12,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:45:12,656 INFO L87 Difference]: Start difference. First operand 974 states and 4245 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:45:13,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:45:13,247 INFO L93 Difference]: Finished difference Result 1238 states and 5312 transitions. [2021-08-12 19:45:13,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:45:13,247 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 19:45:13,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:45:13,253 INFO L225 Difference]: With dead ends: 1238 [2021-08-12 19:45:13,253 INFO L226 Difference]: Without dead ends: 985 [2021-08-12 19:45:13,253 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 530.0ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:45:13,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2021-08-12 19:45:13,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 963. [2021-08-12 19:45:13,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 4.353430353430354) internal successors, (4188), 962 states have internal predecessors, (4188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:45:13,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 4188 transitions. [2021-08-12 19:45:13,409 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 4188 transitions. Word has length 26 [2021-08-12 19:45:13,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:45:13,410 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 4188 transitions. [2021-08-12 19:45:13,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:45:13,410 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 4188 transitions. [2021-08-12 19:45:13,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:45:13,411 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:45:13,411 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:45:13,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-08-12 19:45:13,612 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:45:13,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:45:13,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1919308587, now seen corresponding path program 96 times [2021-08-12 19:45:13,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:45:13,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740185367] [2021-08-12 19:45:13,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:45:13,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:45:13,765 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:45:13,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:45:13,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740185367] [2021-08-12 19:45:13,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740185367] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:45:13,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993543795] [2021-08-12 19:45:13,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:45:13,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 19:45:13,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:45:13,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 19:45:13,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:45:14,295 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:45:14,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993543795] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:45:14,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:45:14,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-12 19:45:14,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198389960] [2021-08-12 19:45:14,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:45:14,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:45:14,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:45:14,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:45:14,296 INFO L87 Difference]: Start difference. First operand 963 states and 4188 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:45:14,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:45:14,969 INFO L93 Difference]: Finished difference Result 1010 states and 4335 transitions. [2021-08-12 19:45:14,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:45:14,970 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 19:45:14,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:45:14,976 INFO L225 Difference]: With dead ends: 1010 [2021-08-12 19:45:14,976 INFO L226 Difference]: Without dead ends: 1003 [2021-08-12 19:45:14,976 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 629.8ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:45:14,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2021-08-12 19:45:15,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 965. [2021-08-12 19:45:15,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 964 states have (on average 4.348547717842323) internal successors, (4192), 964 states have internal predecessors, (4192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:45:15,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 4192 transitions. [2021-08-12 19:45:15,135 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 4192 transitions. Word has length 26 [2021-08-12 19:45:15,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:45:15,135 INFO L482 AbstractCegarLoop]: Abstraction has 965 states and 4192 transitions. [2021-08-12 19:45:15,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:45:15,135 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 4192 transitions. [2021-08-12 19:45:15,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:45:15,137 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:45:15,137 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:45:15,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable449 [2021-08-12 19:45:15,337 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:45:15,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:45:15,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1211170747, now seen corresponding path program 97 times [2021-08-12 19:45:15,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:45:15,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235837948] [2021-08-12 19:45:15,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:45:15,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:45:15,608 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:45:15,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:45:15,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235837948] [2021-08-12 19:45:15,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235837948] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:45:15,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397133941] [2021-08-12 19:45:15,609 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:45:15,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:45:15,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:45:15,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:45:16,157 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:45:16,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397133941] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:45:16,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:45:16,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-12 19:45:16,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120464840] [2021-08-12 19:45:16,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:45:16,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:45:16,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:45:16,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:45:16,158 INFO L87 Difference]: Start difference. First operand 965 states and 4192 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:45:17,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:45:17,207 INFO L93 Difference]: Finished difference Result 1340 states and 5547 transitions. [2021-08-12 19:45:17,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 19:45:17,208 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 19:45:17,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:45:17,214 INFO L225 Difference]: With dead ends: 1340 [2021-08-12 19:45:17,214 INFO L226 Difference]: Without dead ends: 1222 [2021-08-12 19:45:17,215 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 842.9ms TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 19:45:17,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2021-08-12 19:45:17,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 1036. [2021-08-12 19:45:17,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 4.33719806763285) internal successors, (4489), 1035 states have internal predecessors, (4489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:45:17,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 4489 transitions. [2021-08-12 19:45:17,387 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 4489 transitions. Word has length 26 [2021-08-12 19:45:17,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:45:17,387 INFO L482 AbstractCegarLoop]: Abstraction has 1036 states and 4489 transitions. [2021-08-12 19:45:17,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:45:17,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 4489 transitions. [2021-08-12 19:45:17,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:45:17,389 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:45:17,389 INFO L550 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:45:17,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-08-12 19:45:17,589 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:45:17,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:45:17,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1876399727, now seen corresponding path program 98 times [2021-08-12 19:45:17,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:45:17,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179242216] [2021-08-12 19:45:17,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:45:17,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:45:17,729 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:45:17,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:45:17,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179242216] [2021-08-12 19:45:17,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179242216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:45:17,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892664868] [2021-08-12 19:45:17,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:45:17,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:45:17,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:45:17,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 19:45:17,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:45:18,221 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 [2021-08-12 19:45:18,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:45:18,226 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 [2021-08-12 19:45:18,227 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:45:18,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:45:18,318 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 [2021-08-12 19:45:18,319 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:45:18,323 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 [2021-08-12 19:45:18,323 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:45:18,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:45:18,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-08-12 19:45:18,405 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:251, output treesize:223 [2021-08-12 19:46:29,208 WARN L205 SmtUtils]: Spent 1.18 m on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2021-08-12 19:46:29,322 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:46:29,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892664868] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:46:29,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:46:29,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-08-12 19:46:29,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318780921] [2021-08-12 19:46:29,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 19:46:29,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:46:29,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 19:46:29,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:46:29,323 INFO L87 Difference]: Start difference. First operand 1036 states and 4489 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:47:25,231 WARN L205 SmtUtils]: Spent 55.46 s on a formula simplification. DAG size of input: 105 DAG size of output: 97 [2021-08-12 19:47:25,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:47:25,899 INFO L93 Difference]: Finished difference Result 1678 states and 7015 transitions. [2021-08-12 19:47:25,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:47:25,900 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 19:47:25,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:47:25,906 INFO L225 Difference]: With dead ends: 1678 [2021-08-12 19:47:25,906 INFO L226 Difference]: Without dead ends: 1354 [2021-08-12 19:47:25,907 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 126898.8ms TimeCoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:47:25,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-08-12 19:47:26,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 968. [2021-08-12 19:47:26,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 967 states have (on average 4.269906928645295) internal successors, (4129), 967 states have internal predecessors, (4129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:47:26,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 4129 transitions. [2021-08-12 19:47:26,077 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 4129 transitions. Word has length 26 [2021-08-12 19:47:26,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:47:26,077 INFO L482 AbstractCegarLoop]: Abstraction has 968 states and 4129 transitions. [2021-08-12 19:47:26,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:47:26,077 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 4129 transitions. [2021-08-12 19:47:26,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:47:26,079 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:47:26,079 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:47:26,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable457 [2021-08-12 19:47:26,289 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:47:26,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:47:26,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1393853645, now seen corresponding path program 99 times [2021-08-12 19:47:26,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:47:26,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070290253] [2021-08-12 19:47:26,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:47:26,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:47:26,470 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:47:26,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:47:26,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070290253] [2021-08-12 19:47:26,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070290253] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:47:26,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667075999] [2021-08-12 19:47:26,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:47:26,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:47:26,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:47:26,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 19:47:26,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:47:27,048 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:47:27,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667075999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:47:27,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:47:27,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-12 19:47:27,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164019557] [2021-08-12 19:47:27,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:47:27,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:47:27,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:47:27,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:47:27,049 INFO L87 Difference]: Start difference. First operand 968 states and 4129 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:47:27,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:47:27,798 INFO L93 Difference]: Finished difference Result 1033 states and 4318 transitions. [2021-08-12 19:47:27,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:47:27,799 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 19:47:27,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:47:27,804 INFO L225 Difference]: With dead ends: 1033 [2021-08-12 19:47:27,804 INFO L226 Difference]: Without dead ends: 1023 [2021-08-12 19:47:27,805 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 643.7ms TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:47:27,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2021-08-12 19:47:27,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 981. [2021-08-12 19:47:27,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 980 states have (on average 4.259183673469388) internal successors, (4174), 980 states have internal predecessors, (4174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:47:27,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 4174 transitions. [2021-08-12 19:47:27,978 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 4174 transitions. Word has length 26 [2021-08-12 19:47:27,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:47:27,978 INFO L482 AbstractCegarLoop]: Abstraction has 981 states and 4174 transitions. [2021-08-12 19:47:27,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:47:27,979 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 4174 transitions. [2021-08-12 19:47:27,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:47:27,980 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:47:27,980 INFO L550 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:47:28,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable463 [2021-08-12 19:47:28,180 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:47:28,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:47:28,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1558879243, now seen corresponding path program 100 times [2021-08-12 19:47:28,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:47:28,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002026940] [2021-08-12 19:47:28,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:47:28,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:47:28,314 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:47:28,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:47:28,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002026940] [2021-08-12 19:47:28,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002026940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:47:28,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677602517] [2021-08-12 19:47:28,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:47:28,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:47:28,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:47:28,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 19:47:28,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:47:28,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-12 19:47:28,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:47:28,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-12 19:47:28,575 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:47:28,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:47:28,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-08-12 19:47:28,611 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:105, output treesize:91 [2021-08-12 19:47:28,712 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:47:28,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677602517] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:47:28,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:47:28,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-08-12 19:47:28,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648314377] [2021-08-12 19:47:28,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:47:28,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:47:28,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:47:28,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:47:28,713 INFO L87 Difference]: Start difference. First operand 981 states and 4174 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:47:33,027 WARN L205 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2021-08-12 19:47:37,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:47:37,581 INFO L93 Difference]: Finished difference Result 1271 states and 5440 transitions. [2021-08-12 19:47:37,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:47:37,582 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 19:47:37,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:47:37,587 INFO L225 Difference]: With dead ends: 1271 [2021-08-12 19:47:37,587 INFO L226 Difference]: Without dead ends: 996 [2021-08-12 19:47:37,588 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 4564.4ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:47:37,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2021-08-12 19:47:37,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 972. [2021-08-12 19:47:37,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 4.25643666323378) internal successors, (4133), 971 states have internal predecessors, (4133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:47:37,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 4133 transitions. [2021-08-12 19:47:37,760 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 4133 transitions. Word has length 26 [2021-08-12 19:47:37,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:47:37,761 INFO L482 AbstractCegarLoop]: Abstraction has 972 states and 4133 transitions. [2021-08-12 19:47:37,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:47:37,761 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 4133 transitions. [2021-08-12 19:47:37,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:47:37,762 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:47:37,762 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:47:37,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-08-12 19:47:37,963 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:47:37,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:47:37,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1004144201, now seen corresponding path program 101 times [2021-08-12 19:47:37,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:47:37,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432645156] [2021-08-12 19:47:37,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:47:37,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:47:38,182 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:47:38,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:47:38,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432645156] [2021-08-12 19:47:38,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432645156] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:47:38,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152604660] [2021-08-12 19:47:38,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:47:38,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 19:47:38,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:47:38,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 19:47:38,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:47:38,623 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:47:38,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152604660] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:47:38,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:47:38,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-12 19:47:38,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610178109] [2021-08-12 19:47:38,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:47:38,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:47:38,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:47:38,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:47:38,624 INFO L87 Difference]: Start difference. First operand 972 states and 4133 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:47:39,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:47:39,413 INFO L93 Difference]: Finished difference Result 1076 states and 4470 transitions. [2021-08-12 19:47:39,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:47:39,414 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 19:47:39,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:47:39,420 INFO L225 Difference]: With dead ends: 1076 [2021-08-12 19:47:39,420 INFO L226 Difference]: Without dead ends: 1064 [2021-08-12 19:47:39,420 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 606.5ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:47:39,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2021-08-12 19:47:39,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 998. [2021-08-12 19:47:39,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 997 states have (on average 4.235707121364093) internal successors, (4223), 997 states have internal predecessors, (4223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:47:39,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 4223 transitions. [2021-08-12 19:47:39,601 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 4223 transitions. Word has length 26 [2021-08-12 19:47:39,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:47:39,601 INFO L482 AbstractCegarLoop]: Abstraction has 998 states and 4223 transitions. [2021-08-12 19:47:39,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:47:39,601 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 4223 transitions. [2021-08-12 19:47:39,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:47:39,603 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:47:39,603 INFO L550 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:47:39,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:47:39,817 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:47:39,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:47:39,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1300083919, now seen corresponding path program 102 times [2021-08-12 19:47:39,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:47:39,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497854301] [2021-08-12 19:47:39,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:47:39,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:47:39,916 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:47:39,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:47:39,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497854301] [2021-08-12 19:47:39,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497854301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:47:39,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635444189] [2021-08-12 19:47:39,916 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:47:39,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:47:39,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:47:39,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 19:47:39,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:47:40,367 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 [2021-08-12 19:47:40,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:47:40,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-12 19:47:40,372 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:47:40,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:47:40,401 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. [2021-08-12 19:47:40,401 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:99, output treesize:85 [2021-08-12 19:47:40,479 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:47:40,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635444189] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:47:40,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:47:40,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 19 [2021-08-12 19:47:40,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919717160] [2021-08-12 19:47:40,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:47:40,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:47:40,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:47:40,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:47:40,480 INFO L87 Difference]: Start difference. First operand 998 states and 4223 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:47:41,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:47:41,381 INFO L93 Difference]: Finished difference Result 1422 states and 5983 transitions. [2021-08-12 19:47:41,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:47:41,381 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 19:47:41,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:47:41,387 INFO L225 Difference]: With dead ends: 1422 [2021-08-12 19:47:41,387 INFO L226 Difference]: Without dead ends: 1087 [2021-08-12 19:47:41,388 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 568.5ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:47:41,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2021-08-12 19:47:41,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 1004. [2021-08-12 19:47:41,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 4.200398803589232) internal successors, (4213), 1003 states have internal predecessors, (4213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:47:41,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 4213 transitions. [2021-08-12 19:47:41,573 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 4213 transitions. Word has length 26 [2021-08-12 19:47:41,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:47:41,573 INFO L482 AbstractCegarLoop]: Abstraction has 1004 states and 4213 transitions. [2021-08-12 19:47:41,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:47:41,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 4213 transitions. [2021-08-12 19:47:41,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:47:41,574 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:47:41,574 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:47:41,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:47:41,775 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:47:41,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:47:41,775 INFO L82 PathProgramCache]: Analyzing trace with hash -897954321, now seen corresponding path program 103 times [2021-08-12 19:47:41,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:47:41,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311535404] [2021-08-12 19:47:41,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:47:41,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:47:41,921 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:47:41,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:47:41,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311535404] [2021-08-12 19:47:41,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311535404] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:47:41,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845352016] [2021-08-12 19:47:41,922 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:47:41,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:47:41,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:47:41,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:47:42,450 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:47:42,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845352016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:47:42,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:47:42,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-12 19:47:42,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945211216] [2021-08-12 19:47:42,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:47:42,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:47:42,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:47:42,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:47:42,452 INFO L87 Difference]: Start difference. First operand 1004 states and 4213 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:47:43,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:47:43,172 INFO L93 Difference]: Finished difference Result 1061 states and 4374 transitions. [2021-08-12 19:47:43,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:47:43,172 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 19:47:43,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:47:43,178 INFO L225 Difference]: With dead ends: 1061 [2021-08-12 19:47:43,178 INFO L226 Difference]: Without dead ends: 1051 [2021-08-12 19:47:43,179 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 570.1ms TimeCoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:47:43,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2021-08-12 19:47:43,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 1004. [2021-08-12 19:47:43,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 4.200398803589232) internal successors, (4213), 1003 states have internal predecessors, (4213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:47:43,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 4213 transitions. [2021-08-12 19:47:43,363 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 4213 transitions. Word has length 26 [2021-08-12 19:47:43,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:47:43,363 INFO L482 AbstractCegarLoop]: Abstraction has 1004 states and 4213 transitions. [2021-08-12 19:47:43,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:47:43,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 4213 transitions. [2021-08-12 19:47:43,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:47:43,365 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:47:43,365 INFO L550 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:47:43,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-08-12 19:47:43,565 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:47:43,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:47:43,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1993141583, now seen corresponding path program 104 times [2021-08-12 19:47:43,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:47:43,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911864334] [2021-08-12 19:47:43,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:47:43,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:47:43,653 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:47:43,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:47:43,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911864334] [2021-08-12 19:47:43,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911864334] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:47:43,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103774687] [2021-08-12 19:47:43,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:47:43,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:47:43,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:47:43,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:47:43,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:47:44,078 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 [2021-08-12 19:47:44,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:47:44,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-12 19:47:44,083 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:47:44,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:47:44,161 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 [2021-08-12 19:47:44,162 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:47:44,165 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 [2021-08-12 19:47:44,166 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:47:44,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:47:44,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-08-12 19:47:44,247 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:251, output treesize:223 [2021-08-12 19:48:57,108 WARN L205 SmtUtils]: Spent 1.21 m on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2021-08-12 19:48:57,190 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:48:57,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103774687] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:48:57,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:48:57,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-08-12 19:48:57,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884908031] [2021-08-12 19:48:57,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:48:57,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:48:57,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:48:57,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:48:57,191 INFO L87 Difference]: Start difference. First operand 1004 states and 4213 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:34,409 WARN L205 SmtUtils]: Spent 1.62 m on a formula simplification. DAG size of input: 98 DAG size of output: 96 [2021-08-12 19:50:35,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:50:35,059 INFO L93 Difference]: Finished difference Result 1166 states and 4807 transitions. [2021-08-12 19:50:35,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:50:35,059 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 19:50:35,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:50:35,065 INFO L225 Difference]: With dead ends: 1166 [2021-08-12 19:50:35,065 INFO L226 Difference]: Without dead ends: 1013 [2021-08-12 19:50:35,066 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 170326.4ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:50:35,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2021-08-12 19:50:35,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 989. [2021-08-12 19:50:35,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 988 states have (on average 4.202429149797571) internal successors, (4152), 988 states have internal predecessors, (4152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:35,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 4152 transitions. [2021-08-12 19:50:35,252 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 4152 transitions. Word has length 26 [2021-08-12 19:50:35,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:50:35,252 INFO L482 AbstractCegarLoop]: Abstraction has 989 states and 4152 transitions. [2021-08-12 19:50:35,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:35,252 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 4152 transitions. [2021-08-12 19:50:35,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:50:35,254 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:50:35,254 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:50:35,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:50:35,454 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:50:35,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:50:35,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1627018895, now seen corresponding path program 105 times [2021-08-12 19:50:35,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:50:35,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857890829] [2021-08-12 19:50:35,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:50:35,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:50:35,601 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:50:35,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:50:35,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857890829] [2021-08-12 19:50:35,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857890829] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:50:35,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381128773] [2021-08-12 19:50:35,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:50:35,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-12 19:50:35,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:50:35,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:50:35,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:50:36,137 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:50:36,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381128773] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:50:36,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:50:36,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-12 19:50:36,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172616168] [2021-08-12 19:50:36,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:50:36,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:50:36,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:50:36,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:50:36,138 INFO L87 Difference]: Start difference. First operand 989 states and 4152 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:37,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:50:37,011 INFO L93 Difference]: Finished difference Result 1038 states and 4293 transitions. [2021-08-12 19:50:37,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:50:37,012 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 19:50:37,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:50:37,019 INFO L225 Difference]: With dead ends: 1038 [2021-08-12 19:50:37,019 INFO L226 Difference]: Without dead ends: 1028 [2021-08-12 19:50:37,019 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 704.5ms TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:50:37,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2021-08-12 19:50:37,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 985. [2021-08-12 19:50:37,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 4.211382113821138) internal successors, (4144), 984 states have internal predecessors, (4144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:37,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 4144 transitions. [2021-08-12 19:50:37,204 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 4144 transitions. Word has length 26 [2021-08-12 19:50:37,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:50:37,205 INFO L482 AbstractCegarLoop]: Abstraction has 985 states and 4144 transitions. [2021-08-12 19:50:37,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:37,205 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 4144 transitions. [2021-08-12 19:50:37,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:50:37,206 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:50:37,206 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:50:37,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-08-12 19:50:37,407 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:50:37,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:50:37,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1202707659, now seen corresponding path program 106 times [2021-08-12 19:50:37,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:50:37,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642525108] [2021-08-12 19:50:37,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:50:37,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:50:37,580 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:50:37,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:50:37,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642525108] [2021-08-12 19:50:37,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642525108] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:50:37,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695054619] [2021-08-12 19:50:37,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:50:37,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:50:37,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:50:37,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:50:37,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:50:38,178 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:50:38,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695054619] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:50:38,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:50:38,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-12 19:50:38,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301380190] [2021-08-12 19:50:38,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:50:38,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:50:38,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:50:38,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:50:38,179 INFO L87 Difference]: Start difference. First operand 985 states and 4144 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:39,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:50:39,160 INFO L93 Difference]: Finished difference Result 1046 states and 4313 transitions. [2021-08-12 19:50:39,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:50:39,161 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 19:50:39,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:50:39,167 INFO L225 Difference]: With dead ends: 1046 [2021-08-12 19:50:39,167 INFO L226 Difference]: Without dead ends: 1036 [2021-08-12 19:50:39,167 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 814.4ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:50:39,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2021-08-12 19:50:39,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 983. [2021-08-12 19:50:39,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 982 states have (on average 4.214867617107943) internal successors, (4139), 982 states have internal predecessors, (4139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:39,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 4139 transitions. [2021-08-12 19:50:39,357 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 4139 transitions. Word has length 26 [2021-08-12 19:50:39,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:50:39,357 INFO L482 AbstractCegarLoop]: Abstraction has 983 states and 4139 transitions. [2021-08-12 19:50:39,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:39,357 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 4139 transitions. [2021-08-12 19:50:39,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:50:39,359 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:50:39,359 INFO L550 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:50:39,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:50:39,559 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:50:39,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:50:39,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1918224333, now seen corresponding path program 107 times [2021-08-12 19:50:39,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:50:39,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339189847] [2021-08-12 19:50:39,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:50:39,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:50:39,638 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:50:39,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:50:39,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339189847] [2021-08-12 19:50:39,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339189847] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:50:39,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495397042] [2021-08-12 19:50:39,639 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:50:39,687 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 19:50:39,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:50:39,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 19:50:39,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:50:40,061 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 [2021-08-12 19:50:40,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:50:40,065 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 [2021-08-12 19:50:40,066 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:50:40,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:50:40,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-08-12 19:50:40,112 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:129, output treesize:115 [2021-08-12 19:50:40,250 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:50:40,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495397042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:50:40,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:50:40,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-08-12 19:50:40,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439679668] [2021-08-12 19:50:40,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:50:40,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:50:40,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:50:40,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:50:40,251 INFO L87 Difference]: Start difference. First operand 983 states and 4139 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:40,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:50:40,935 INFO L93 Difference]: Finished difference Result 1192 states and 4940 transitions. [2021-08-12 19:50:40,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:50:40,935 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 19:50:40,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:50:40,941 INFO L225 Difference]: With dead ends: 1192 [2021-08-12 19:50:40,941 INFO L226 Difference]: Without dead ends: 939 [2021-08-12 19:50:40,942 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 439.0ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:50:40,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-08-12 19:50:41,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 911. [2021-08-12 19:50:41,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 910 states have (on average 4.175824175824176) internal successors, (3800), 910 states have internal predecessors, (3800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:41,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 3800 transitions. [2021-08-12 19:50:41,122 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 3800 transitions. Word has length 26 [2021-08-12 19:50:41,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:50:41,122 INFO L482 AbstractCegarLoop]: Abstraction has 911 states and 3800 transitions. [2021-08-12 19:50:41,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:41,122 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 3800 transitions. [2021-08-12 19:50:41,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:50:41,123 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:50:41,123 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:50:41,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-08-12 19:50:41,327 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:50:41,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:50:41,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1352029039, now seen corresponding path program 108 times [2021-08-12 19:50:41,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:50:41,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046345011] [2021-08-12 19:50:41,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:50:41,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:50:41,565 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:50:41,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:50:41,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046345011] [2021-08-12 19:50:41,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046345011] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:50:41,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044352721] [2021-08-12 19:50:41,565 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:50:41,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 19:50:41,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:50:41,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 19:50:41,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:50:42,177 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:50:42,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044352721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:50:42,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:50:42,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-12 19:50:42,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554741508] [2021-08-12 19:50:42,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:50:42,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:50:42,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:50:42,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:50:42,178 INFO L87 Difference]: Start difference. First operand 911 states and 3800 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:42,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:50:42,952 INFO L93 Difference]: Finished difference Result 987 states and 4055 transitions. [2021-08-12 19:50:42,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:50:42,952 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 19:50:42,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:50:42,959 INFO L225 Difference]: With dead ends: 987 [2021-08-12 19:50:42,959 INFO L226 Difference]: Without dead ends: 975 [2021-08-12 19:50:42,960 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 795.3ms TimeCoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:50:42,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-08-12 19:50:43,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 915. [2021-08-12 19:50:43,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 4.168490153172867) internal successors, (3810), 914 states have internal predecessors, (3810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:43,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 3810 transitions. [2021-08-12 19:50:43,156 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 3810 transitions. Word has length 26 [2021-08-12 19:50:43,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:50:43,156 INFO L482 AbstractCegarLoop]: Abstraction has 915 states and 3810 transitions. [2021-08-12 19:50:43,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:43,156 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 3810 transitions. [2021-08-12 19:50:43,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:50:43,157 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:50:43,157 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:50:43,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable501,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:50:43,358 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:50:43,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:50:43,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1778450295, now seen corresponding path program 109 times [2021-08-12 19:50:43,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:50:43,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300115112] [2021-08-12 19:50:43,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:50:43,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:50:43,546 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:50:43,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:50:43,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300115112] [2021-08-12 19:50:43,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300115112] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:50:43,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159980785] [2021-08-12 19:50:43,547 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:50:43,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:50:43,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:50:43,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:50:44,188 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:50:44,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159980785] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:50:44,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:50:44,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-12 19:50:44,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223455223] [2021-08-12 19:50:44,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:50:44,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:50:44,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:50:44,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:50:44,189 INFO L87 Difference]: Start difference. First operand 915 states and 3810 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:45,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:50:45,153 INFO L93 Difference]: Finished difference Result 960 states and 3951 transitions. [2021-08-12 19:50:45,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:50:45,154 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 19:50:45,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:50:45,160 INFO L225 Difference]: With dead ends: 960 [2021-08-12 19:50:45,160 INFO L226 Difference]: Without dead ends: 953 [2021-08-12 19:50:45,160 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 872.8ms TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:50:45,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-08-12 19:50:45,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 907. [2021-08-12 19:50:45,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 4.181015452538631) internal successors, (3788), 906 states have internal predecessors, (3788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:45,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 3788 transitions. [2021-08-12 19:50:45,339 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 3788 transitions. Word has length 26 [2021-08-12 19:50:45,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:50:45,339 INFO L482 AbstractCegarLoop]: Abstraction has 907 states and 3788 transitions. [2021-08-12 19:50:45,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:45,339 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 3788 transitions. [2021-08-12 19:50:45,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:50:45,340 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:50:45,341 INFO L550 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:50:45,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:50:45,541 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:50:45,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:50:45,542 INFO L82 PathProgramCache]: Analyzing trace with hash 826574097, now seen corresponding path program 110 times [2021-08-12 19:50:45,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:50:45,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078670531] [2021-08-12 19:50:45,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:50:45,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:50:45,719 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:50:45,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:50:45,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078670531] [2021-08-12 19:50:45,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078670531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:50:45,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639814238] [2021-08-12 19:50:45,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:50:45,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:50:45,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:50:45,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:50:45,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:50:46,302 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:50:46,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639814238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:50:46,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:50:46,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-12 19:50:46,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960598474] [2021-08-12 19:50:46,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:50:46,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:50:46,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:50:46,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:50:46,303 INFO L87 Difference]: Start difference. First operand 907 states and 3788 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:47,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:50:47,172 INFO L93 Difference]: Finished difference Result 956 states and 3921 transitions. [2021-08-12 19:50:47,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:50:47,173 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 19:50:47,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:50:47,178 INFO L225 Difference]: With dead ends: 956 [2021-08-12 19:50:47,178 INFO L226 Difference]: Without dead ends: 946 [2021-08-12 19:50:47,179 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 782.8ms TimeCoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:50:47,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-08-12 19:50:47,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 895. [2021-08-12 19:50:47,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 4.196868008948546) internal successors, (3752), 894 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:47,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 3752 transitions. [2021-08-12 19:50:47,352 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 3752 transitions. Word has length 26 [2021-08-12 19:50:47,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:50:47,352 INFO L482 AbstractCegarLoop]: Abstraction has 895 states and 3752 transitions. [2021-08-12 19:50:47,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:47,352 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 3752 transitions. [2021-08-12 19:50:47,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:50:47,353 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:50:47,353 INFO L550 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:50:47,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable512 [2021-08-12 19:50:47,554 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:50:47,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:50:47,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1463466562, now seen corresponding path program 111 times [2021-08-12 19:50:47,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:50:47,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778411803] [2021-08-12 19:50:47,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:50:47,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:50:47,715 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:50:47,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:50:47,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778411803] [2021-08-12 19:50:47,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778411803] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:50:47,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254623030] [2021-08-12 19:50:47,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:50:47,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 19:50:47,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:50:47,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 19:50:47,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:50:48,448 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:50:48,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254623030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:50:48,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:50:48,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-08-12 19:50:48,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439278863] [2021-08-12 19:50:48,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-08-12 19:50:48,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:50:48,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-12 19:50:48,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:50:48,449 INFO L87 Difference]: Start difference. First operand 895 states and 3752 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:49,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:50:49,240 INFO L93 Difference]: Finished difference Result 1014 states and 4179 transitions. [2021-08-12 19:50:49,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:50:49,241 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-12 19:50:49,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:50:49,247 INFO L225 Difference]: With dead ends: 1014 [2021-08-12 19:50:49,247 INFO L226 Difference]: Without dead ends: 909 [2021-08-12 19:50:49,247 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 847.3ms TimeCoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:50:49,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2021-08-12 19:50:49,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 897. [2021-08-12 19:50:49,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 4.180803571428571) internal successors, (3746), 896 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:49,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3746 transitions. [2021-08-12 19:50:49,437 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3746 transitions. Word has length 27 [2021-08-12 19:50:49,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:50:49,437 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 3746 transitions. [2021-08-12 19:50:49,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:49,437 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3746 transitions. [2021-08-12 19:50:49,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:50:49,438 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:50:49,438 INFO L550 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:50:49,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:50:49,639 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:50:49,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:50:49,639 INFO L82 PathProgramCache]: Analyzing trace with hash 275921892, now seen corresponding path program 112 times [2021-08-12 19:50:49,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:50:49,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917347849] [2021-08-12 19:50:49,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:50:49,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:50:49,822 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:50:49,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:50:49,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917347849] [2021-08-12 19:50:49,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917347849] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:50:49,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630321195] [2021-08-12 19:50:49,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:50:49,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:50:49,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:50:49,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 19:50:49,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:50:50,431 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:50:50,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630321195] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:50:50,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:50:50,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-08-12 19:50:50,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040512249] [2021-08-12 19:50:50,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-08-12 19:50:50,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:50:50,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-12 19:50:50,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:50:50,433 INFO L87 Difference]: Start difference. First operand 897 states and 3746 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:51,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:50:51,453 INFO L93 Difference]: Finished difference Result 1158 states and 4889 transitions. [2021-08-12 19:50:51,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:50:51,454 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-12 19:50:51,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:50:51,461 INFO L225 Difference]: With dead ends: 1158 [2021-08-12 19:50:51,461 INFO L226 Difference]: Without dead ends: 908 [2021-08-12 19:50:51,461 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 933.3ms TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 19:50:51,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2021-08-12 19:50:51,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 891. [2021-08-12 19:50:51,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 4.180898876404495) internal successors, (3721), 890 states have internal predecessors, (3721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:51,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 3721 transitions. [2021-08-12 19:50:51,637 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 3721 transitions. Word has length 27 [2021-08-12 19:50:51,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:50:51,637 INFO L482 AbstractCegarLoop]: Abstraction has 891 states and 3721 transitions. [2021-08-12 19:50:51,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:51,637 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 3721 transitions. [2021-08-12 19:50:51,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:50:51,638 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:50:51,639 INFO L550 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:50:51,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2021-08-12 19:50:51,839 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:50:51,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:50:51,839 INFO L82 PathProgramCache]: Analyzing trace with hash -572700580, now seen corresponding path program 113 times [2021-08-12 19:50:51,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:50:51,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466476468] [2021-08-12 19:50:51,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:50:51,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:50:52,065 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:50:52,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:50:52,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466476468] [2021-08-12 19:50:52,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466476468] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:50:52,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800617046] [2021-08-12 19:50:52,065 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:50:52,107 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 19:50:52,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:50:52,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 19:50:52,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:50:52,856 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:50:52,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800617046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:50:52,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:50:52,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-08-12 19:50:52,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471526062] [2021-08-12 19:50:52,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-08-12 19:50:52,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:50:52,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-12 19:50:52,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:50:52,857 INFO L87 Difference]: Start difference. First operand 891 states and 3721 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:53,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:50:53,736 INFO L93 Difference]: Finished difference Result 1061 states and 4338 transitions. [2021-08-12 19:50:53,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:50:53,736 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-12 19:50:53,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:50:53,742 INFO L225 Difference]: With dead ends: 1061 [2021-08-12 19:50:53,742 INFO L226 Difference]: Without dead ends: 913 [2021-08-12 19:50:53,743 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 894.9ms TimeCoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:50:53,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2021-08-12 19:50:53,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 888. [2021-08-12 19:50:53,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 4.174746335963923) internal successors, (3703), 887 states have internal predecessors, (3703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:53,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3703 transitions. [2021-08-12 19:50:53,922 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3703 transitions. Word has length 27 [2021-08-12 19:50:53,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:50:53,922 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3703 transitions. [2021-08-12 19:50:53,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:53,922 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3703 transitions. [2021-08-12 19:50:53,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:50:53,923 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:50:53,923 INFO L550 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:50:54,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable524,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:50:54,124 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:50:54,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:50:54,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1255922468, now seen corresponding path program 114 times [2021-08-12 19:50:54,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:50:54,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2168252] [2021-08-12 19:50:54,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:50:54,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:50:54,221 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:50:54,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:50:54,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2168252] [2021-08-12 19:50:54,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2168252] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:50:54,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440342460] [2021-08-12 19:50:54,221 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:50:54,258 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 19:50:54,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:50:54,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-12 19:50:54,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:50:54,664 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 [2021-08-12 19:50:54,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:50:54,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:50:54,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-12 19:50:54,678 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:50:54,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:50:54,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:50:54,687 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:50, output treesize:36 [2021-08-12 19:50:54,722 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:50:54,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440342460] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:50:54,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:50:54,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 22 [2021-08-12 19:50:54,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817790136] [2021-08-12 19:50:54,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:50:54,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:50:54,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:50:54,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:50:54,723 INFO L87 Difference]: Start difference. First operand 888 states and 3703 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:56,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:50:56,053 INFO L93 Difference]: Finished difference Result 2172 states and 8781 transitions. [2021-08-12 19:50:56,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 19:50:56,054 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-12 19:50:56,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:50:56,061 INFO L225 Difference]: With dead ends: 2172 [2021-08-12 19:50:56,062 INFO L226 Difference]: Without dead ends: 1912 [2021-08-12 19:50:56,062 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 476.8ms TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:50:56,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1912 states. [2021-08-12 19:50:56,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1912 to 960. [2021-08-12 19:50:56,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 4.211678832116788) internal successors, (4039), 959 states have internal predecessors, (4039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:56,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 4039 transitions. [2021-08-12 19:50:56,256 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 4039 transitions. Word has length 27 [2021-08-12 19:50:56,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:50:56,256 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 4039 transitions. [2021-08-12 19:50:56,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:56,257 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 4039 transitions. [2021-08-12 19:50:56,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:50:56,258 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:50:56,258 INFO L550 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:50:56,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable530,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:50:56,458 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:50:56,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:50:56,459 INFO L82 PathProgramCache]: Analyzing trace with hash 231208544, now seen corresponding path program 115 times [2021-08-12 19:50:56,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:50:56,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240125735] [2021-08-12 19:50:56,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:50:56,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:50:56,617 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:50:56,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:50:56,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240125735] [2021-08-12 19:50:56,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240125735] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:50:56,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799983521] [2021-08-12 19:50:56,617 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:50:56,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:50:56,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 19:50:56,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:50:57,070 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:50:57,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799983521] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:50:57,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:50:57,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-08-12 19:50:57,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527431819] [2021-08-12 19:50:57,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-08-12 19:50:57,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:50:57,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-12 19:50:57,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:50:57,071 INFO L87 Difference]: Start difference. First operand 960 states and 4039 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:57,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:50:57,999 INFO L93 Difference]: Finished difference Result 1237 states and 5266 transitions. [2021-08-12 19:50:57,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:50:57,999 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-12 19:50:57,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:50:58,005 INFO L225 Difference]: With dead ends: 1237 [2021-08-12 19:50:58,005 INFO L226 Difference]: Without dead ends: 982 [2021-08-12 19:50:58,005 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 672.1ms TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-08-12 19:50:58,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2021-08-12 19:50:58,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 964. [2021-08-12 19:50:58,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 963 states have (on average 4.19730010384216) internal successors, (4042), 963 states have internal predecessors, (4042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:58,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 4042 transitions. [2021-08-12 19:50:58,197 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 4042 transitions. Word has length 27 [2021-08-12 19:50:58,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:50:58,197 INFO L482 AbstractCegarLoop]: Abstraction has 964 states and 4042 transitions. [2021-08-12 19:50:58,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:50:58,197 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 4042 transitions. [2021-08-12 19:50:58,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:50:58,198 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:50:58,198 INFO L550 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:50:58,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2021-08-12 19:50:58,399 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:50:58,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:50:58,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1019543526, now seen corresponding path program 116 times [2021-08-12 19:50:58,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:50:58,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909866384] [2021-08-12 19:50:58,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:50:58,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:50:58,519 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:50:58,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:50:58,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909866384] [2021-08-12 19:50:58,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909866384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:50:58,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622677737] [2021-08-12 19:50:58,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:50:58,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:50:58,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:50:58,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 19:50:58,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:50:58,947 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 [2021-08-12 19:50:58,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:50:58,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:50:58,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-12 19:50:58,989 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:50:58,993 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 [2021-08-12 19:50:58,994 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:50:59,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:50:59,030 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 [2021-08-12 19:50:59,031 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:50:59,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:50:59,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 3 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2021-08-12 19:50:59,067 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 11 variables, input treesize:121, output treesize:93 [2021-08-12 19:51:01,133 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 57 [2021-08-12 19:51:01,183 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:01,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622677737] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:01,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:51:01,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-08-12 19:51:01,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646190949] [2021-08-12 19:51:01,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 19:51:01,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:51:01,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 19:51:01,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:51:01,184 INFO L87 Difference]: Start difference. First operand 964 states and 4042 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:04,706 WARN L205 SmtUtils]: Spent 3.25 s on a formula simplification. DAG size of input: 77 DAG size of output: 77 [2021-08-12 19:51:09,112 WARN L205 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-08-12 19:51:11,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:51:11,709 INFO L93 Difference]: Finished difference Result 1786 states and 7566 transitions. [2021-08-12 19:51:11,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:51:11,710 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-12 19:51:11,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:51:11,716 INFO L225 Difference]: With dead ends: 1786 [2021-08-12 19:51:11,716 INFO L226 Difference]: Without dead ends: 1284 [2021-08-12 19:51:11,717 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 7968.6ms TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:51:11,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2021-08-12 19:51:11,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 1004. [2021-08-12 19:51:11,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 4.161515453639082) internal successors, (4174), 1003 states have internal predecessors, (4174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:11,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 4174 transitions. [2021-08-12 19:51:11,918 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 4174 transitions. Word has length 27 [2021-08-12 19:51:11,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:51:11,918 INFO L482 AbstractCegarLoop]: Abstraction has 1004 states and 4174 transitions. [2021-08-12 19:51:11,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:11,919 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 4174 transitions. [2021-08-12 19:51:11,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:51:11,920 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:51:11,920 INFO L550 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:51:12,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-08-12 19:51:12,120 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:51:12,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:51:12,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1395696506, now seen corresponding path program 117 times [2021-08-12 19:51:12,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:51:12,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628811862] [2021-08-12 19:51:12,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:51:12,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:51:12,276 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:12,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:51:12,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628811862] [2021-08-12 19:51:12,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628811862] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:12,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260391103] [2021-08-12 19:51:12,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:51:12,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 19:51:12,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:51:12,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 19:51:12,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:51:12,785 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:12,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260391103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:12,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:51:12,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-08-12 19:51:12,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973556196] [2021-08-12 19:51:12,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-08-12 19:51:12,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:51:12,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-12 19:51:12,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:51:12,786 INFO L87 Difference]: Start difference. First operand 1004 states and 4174 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:13,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:51:13,793 INFO L93 Difference]: Finished difference Result 1178 states and 4781 transitions. [2021-08-12 19:51:13,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:51:13,793 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-12 19:51:13,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:51:13,800 INFO L225 Difference]: With dead ends: 1178 [2021-08-12 19:51:13,800 INFO L226 Difference]: Without dead ends: 1018 [2021-08-12 19:51:13,801 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 733.7ms TimeCoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 19:51:13,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2021-08-12 19:51:14,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 991. [2021-08-12 19:51:14,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 4.161616161616162) internal successors, (4120), 990 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:14,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 4120 transitions. [2021-08-12 19:51:14,007 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 4120 transitions. Word has length 27 [2021-08-12 19:51:14,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:51:14,007 INFO L482 AbstractCegarLoop]: Abstraction has 991 states and 4120 transitions. [2021-08-12 19:51:14,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:14,007 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 4120 transitions. [2021-08-12 19:51:14,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:51:14,008 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:51:14,008 INFO L550 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:51:14,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2021-08-12 19:51:14,209 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:51:14,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:51:14,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1704301448, now seen corresponding path program 118 times [2021-08-12 19:51:14,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:51:14,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795603812] [2021-08-12 19:51:14,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:51:14,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:51:14,367 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:14,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:51:14,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795603812] [2021-08-12 19:51:14,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795603812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:14,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559188232] [2021-08-12 19:51:14,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:51:14,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:51:14,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:51:14,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 19:51:14,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:51:14,969 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:14,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559188232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:14,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:51:14,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-08-12 19:51:14,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989725674] [2021-08-12 19:51:14,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-08-12 19:51:14,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:51:14,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-12 19:51:14,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:51:14,970 INFO L87 Difference]: Start difference. First operand 991 states and 4120 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:15,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:51:15,896 INFO L93 Difference]: Finished difference Result 1240 states and 5224 transitions. [2021-08-12 19:51:15,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:51:15,896 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-12 19:51:15,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:51:15,902 INFO L225 Difference]: With dead ends: 1240 [2021-08-12 19:51:15,902 INFO L226 Difference]: Without dead ends: 1002 [2021-08-12 19:51:15,903 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 813.8ms TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-08-12 19:51:15,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2021-08-12 19:51:16,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 988. [2021-08-12 19:51:16,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 988 states, 987 states have (on average 4.156028368794326) internal successors, (4102), 987 states have internal predecessors, (4102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:16,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 4102 transitions. [2021-08-12 19:51:16,099 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 4102 transitions. Word has length 27 [2021-08-12 19:51:16,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:51:16,100 INFO L482 AbstractCegarLoop]: Abstraction has 988 states and 4102 transitions. [2021-08-12 19:51:16,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:16,100 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 4102 transitions. [2021-08-12 19:51:16,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:51:16,101 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:51:16,101 INFO L550 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:51:16,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:51:16,302 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:51:16,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:51:16,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1973047876, now seen corresponding path program 119 times [2021-08-12 19:51:16,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:51:16,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093749697] [2021-08-12 19:51:16,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:51:16,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:51:16,459 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:16,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:51:16,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093749697] [2021-08-12 19:51:16,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093749697] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:16,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952040130] [2021-08-12 19:51:16,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:51:16,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-12 19:51:16,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:51:16,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 19:51:16,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:51:17,040 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:17,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952040130] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:17,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:51:17,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-08-12 19:51:17,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871513297] [2021-08-12 19:51:17,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-08-12 19:51:17,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:51:17,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-12 19:51:17,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:51:17,042 INFO L87 Difference]: Start difference. First operand 988 states and 4102 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:17,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:51:17,845 INFO L93 Difference]: Finished difference Result 1236 states and 5082 transitions. [2021-08-12 19:51:17,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:51:17,845 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-12 19:51:17,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:51:17,851 INFO L225 Difference]: With dead ends: 1236 [2021-08-12 19:51:17,851 INFO L226 Difference]: Without dead ends: 939 [2021-08-12 19:51:17,852 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 667.9ms TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:51:17,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-08-12 19:51:18,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 920. [2021-08-12 19:51:18,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 4.077257889009793) internal successors, (3747), 919 states have internal predecessors, (3747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:18,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 3747 transitions. [2021-08-12 19:51:18,038 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 3747 transitions. Word has length 27 [2021-08-12 19:51:18,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:51:18,038 INFO L482 AbstractCegarLoop]: Abstraction has 920 states and 3747 transitions. [2021-08-12 19:51:18,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:18,038 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 3747 transitions. [2021-08-12 19:51:18,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:51:18,039 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:51:18,039 INFO L550 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:51:18,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-08-12 19:51:18,240 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:51:18,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:51:18,240 INFO L82 PathProgramCache]: Analyzing trace with hash -174588260, now seen corresponding path program 120 times [2021-08-12 19:51:18,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:51:18,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101842325] [2021-08-12 19:51:18,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:51:18,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:51:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:18,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:51:18,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101842325] [2021-08-12 19:51:18,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101842325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:18,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334533628] [2021-08-12 19:51:18,398 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:51:18,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-12 19:51:18,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:51:18,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:51:18,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:51:18,961 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:18,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334533628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:18,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:51:18,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-08-12 19:51:18,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891249654] [2021-08-12 19:51:18,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-08-12 19:51:18,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:51:18,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-12 19:51:18,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:51:18,962 INFO L87 Difference]: Start difference. First operand 920 states and 3747 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:19,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:51:19,904 INFO L93 Difference]: Finished difference Result 1211 states and 5018 transitions. [2021-08-12 19:51:19,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:51:19,904 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-12 19:51:19,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:51:19,911 INFO L225 Difference]: With dead ends: 1211 [2021-08-12 19:51:19,911 INFO L226 Difference]: Without dead ends: 956 [2021-08-12 19:51:19,911 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 696.8ms TimeCoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:51:19,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2021-08-12 19:51:20,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 938. [2021-08-12 19:51:20,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 937 states have (on average 4.049092849519744) internal successors, (3794), 937 states have internal predecessors, (3794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:20,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 3794 transitions. [2021-08-12 19:51:20,114 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 3794 transitions. Word has length 27 [2021-08-12 19:51:20,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:51:20,114 INFO L482 AbstractCegarLoop]: Abstraction has 938 states and 3794 transitions. [2021-08-12 19:51:20,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:20,114 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 3794 transitions. [2021-08-12 19:51:20,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:51:20,115 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:51:20,115 INFO L550 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:51:20,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable546,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:51:20,316 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:51:20,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:51:20,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1425340330, now seen corresponding path program 121 times [2021-08-12 19:51:20,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:51:20,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533493139] [2021-08-12 19:51:20,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:51:20,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:51:20,447 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:20,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:51:20,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533493139] [2021-08-12 19:51:20,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533493139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:20,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293527945] [2021-08-12 19:51:20,447 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:51:20,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:51:20,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:51:20,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:51:20,809 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 [2021-08-12 19:51:20,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:51:20,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:51:20,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-12 19:51:20,847 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:51:20,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:51:20,880 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 [2021-08-12 19:51:20,881 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:51:20,884 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 [2021-08-12 19:51:20,885 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:51:20,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:51:20,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 3 dim-1 vars, End of recursive call: 3 dim-0 vars, and 2 xjuncts. [2021-08-12 19:51:20,914 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 9 variables, input treesize:107, output treesize:79 [2021-08-12 19:51:21,000 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:21,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293527945] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:21,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:51:21,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-08-12 19:51:21,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602874654] [2021-08-12 19:51:21,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:51:21,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:51:21,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:51:21,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:51:21,001 INFO L87 Difference]: Start difference. First operand 938 states and 3794 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:25,256 WARN L205 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2021-08-12 19:51:29,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:51:29,079 INFO L93 Difference]: Finished difference Result 3420 states and 14507 transitions. [2021-08-12 19:51:29,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 19:51:29,079 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-12 19:51:29,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:51:29,090 INFO L225 Difference]: With dead ends: 3420 [2021-08-12 19:51:29,090 INFO L226 Difference]: Without dead ends: 3001 [2021-08-12 19:51:29,091 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 4690.6ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:51:29,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3001 states. [2021-08-12 19:51:29,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3001 to 1289. [2021-08-12 19:51:29,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1289 states, 1288 states have (on average 4.475931677018633) internal successors, (5765), 1288 states have internal predecessors, (5765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:29,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 5765 transitions. [2021-08-12 19:51:29,336 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 5765 transitions. Word has length 27 [2021-08-12 19:51:29,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:51:29,336 INFO L482 AbstractCegarLoop]: Abstraction has 1289 states and 5765 transitions. [2021-08-12 19:51:29,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:29,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 5765 transitions. [2021-08-12 19:51:29,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:51:29,338 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:51:29,338 INFO L550 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:51:29,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable549 [2021-08-12 19:51:29,539 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:51:29,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:51:29,539 INFO L82 PathProgramCache]: Analyzing trace with hash 989899702, now seen corresponding path program 122 times [2021-08-12 19:51:29,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:51:29,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996098033] [2021-08-12 19:51:29,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:51:29,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:51:29,715 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:29,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:51:29,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996098033] [2021-08-12 19:51:29,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996098033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:29,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981618733] [2021-08-12 19:51:29,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:51:29,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:51:29,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:51:29,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:51:29,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:51:30,276 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:30,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981618733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:30,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:51:30,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-08-12 19:51:30,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15356820] [2021-08-12 19:51:30,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-08-12 19:51:30,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:51:30,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-12 19:51:30,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:51:30,277 INFO L87 Difference]: Start difference. First operand 1289 states and 5765 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:31,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:51:31,332 INFO L93 Difference]: Finished difference Result 1464 states and 6402 transitions. [2021-08-12 19:51:31,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:51:31,332 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-12 19:51:31,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:51:31,339 INFO L225 Difference]: With dead ends: 1464 [2021-08-12 19:51:31,340 INFO L226 Difference]: Without dead ends: 1318 [2021-08-12 19:51:31,340 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 779.0ms TimeCoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2021-08-12 19:51:31,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-08-12 19:51:31,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 1292. [2021-08-12 19:51:31,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 4.472501936483346) internal successors, (5774), 1291 states have internal predecessors, (5774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:31,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 5774 transitions. [2021-08-12 19:51:31,579 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 5774 transitions. Word has length 27 [2021-08-12 19:51:31,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:51:31,579 INFO L482 AbstractCegarLoop]: Abstraction has 1292 states and 5774 transitions. [2021-08-12 19:51:31,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:31,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 5774 transitions. [2021-08-12 19:51:31,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:51:31,581 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:51:31,581 INFO L550 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:51:31,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable552,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:51:31,782 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:51:31,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:51:31,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1435291434, now seen corresponding path program 123 times [2021-08-12 19:51:31,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:51:31,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928992600] [2021-08-12 19:51:31,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:51:31,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:51:31,934 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:31,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:51:31,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928992600] [2021-08-12 19:51:31,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928992600] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:31,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879490614] [2021-08-12 19:51:31,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:51:31,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 19:51:31,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:51:31,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:51:31,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:51:32,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-12 19:51:32,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:51:32,247 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 [2021-08-12 19:51:32,248 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:51:32,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:51:32,284 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 [2021-08-12 19:51:32,285 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:51:32,288 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 [2021-08-12 19:51:32,288 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:51:32,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:51:32,318 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. [2021-08-12 19:51:32,318 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:109, output treesize:81 [2021-08-12 19:51:32,420 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:32,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879490614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:32,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:51:32,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2021-08-12 19:51:32,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217587626] [2021-08-12 19:51:32,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 19:51:32,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:51:32,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 19:51:32,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:51:32,421 INFO L87 Difference]: Start difference. First operand 1292 states and 5774 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:34,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:51:34,674 INFO L93 Difference]: Finished difference Result 3698 states and 16284 transitions. [2021-08-12 19:51:34,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 19:51:34,674 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-12 19:51:34,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:51:34,686 INFO L225 Difference]: With dead ends: 3698 [2021-08-12 19:51:34,687 INFO L226 Difference]: Without dead ends: 3422 [2021-08-12 19:51:34,687 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 631.2ms TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:51:34,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3422 states. [2021-08-12 19:51:34,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3422 to 1575. [2021-08-12 19:51:34,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1574 states have (on average 4.708386277001271) internal successors, (7411), 1574 states have internal predecessors, (7411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:34,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 7411 transitions. [2021-08-12 19:51:34,969 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 7411 transitions. Word has length 27 [2021-08-12 19:51:34,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:51:34,969 INFO L482 AbstractCegarLoop]: Abstraction has 1575 states and 7411 transitions. [2021-08-12 19:51:34,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:34,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 7411 transitions. [2021-08-12 19:51:34,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:51:34,972 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:51:34,972 INFO L550 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:51:35,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable556,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:51:35,172 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:51:35,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:51:35,173 INFO L82 PathProgramCache]: Analyzing trace with hash -2110098252, now seen corresponding path program 124 times [2021-08-12 19:51:35,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:51:35,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237551245] [2021-08-12 19:51:35,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:51:35,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:51:35,367 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:35,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:51:35,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237551245] [2021-08-12 19:51:35,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237551245] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:35,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608097276] [2021-08-12 19:51:35,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:51:35,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:51:35,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:51:35,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 19:51:35,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:51:35,832 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:35,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608097276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:35,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:51:35,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-08-12 19:51:35,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944530653] [2021-08-12 19:51:35,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-08-12 19:51:35,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:51:35,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-12 19:51:35,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:51:35,833 INFO L87 Difference]: Start difference. First operand 1575 states and 7411 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:36,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:51:36,902 INFO L93 Difference]: Finished difference Result 1892 states and 8867 transitions. [2021-08-12 19:51:36,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:51:36,902 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-12 19:51:36,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:51:36,912 INFO L225 Difference]: With dead ends: 1892 [2021-08-12 19:51:36,912 INFO L226 Difference]: Without dead ends: 1593 [2021-08-12 19:51:36,913 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 690.3ms TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:51:36,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2021-08-12 19:51:37,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1572. [2021-08-12 19:51:37,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1571 states have (on average 4.707829408020369) internal successors, (7396), 1571 states have internal predecessors, (7396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:37,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 7396 transitions. [2021-08-12 19:51:37,188 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 7396 transitions. Word has length 27 [2021-08-12 19:51:37,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:51:37,189 INFO L482 AbstractCegarLoop]: Abstraction has 1572 states and 7396 transitions. [2021-08-12 19:51:37,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:37,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 7396 transitions. [2021-08-12 19:51:37,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:51:37,191 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:51:37,191 INFO L550 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:51:37,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2021-08-12 19:51:37,392 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:51:37,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:51:37,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1916122616, now seen corresponding path program 125 times [2021-08-12 19:51:37,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:51:37,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769387869] [2021-08-12 19:51:37,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:51:37,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:51:37,577 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:37,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:51:37,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769387869] [2021-08-12 19:51:37,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769387869] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:37,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138089617] [2021-08-12 19:51:37,577 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:51:37,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 19:51:37,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:51:37,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 19:51:37,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:51:38,178 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:38,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138089617] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:38,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:51:38,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-08-12 19:51:38,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170252487] [2021-08-12 19:51:38,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-08-12 19:51:38,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:51:38,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-12 19:51:38,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:51:38,179 INFO L87 Difference]: Start difference. First operand 1572 states and 7396 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:39,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:51:39,170 INFO L93 Difference]: Finished difference Result 1724 states and 7964 transitions. [2021-08-12 19:51:39,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:51:39,170 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-12 19:51:39,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:51:39,180 INFO L225 Difference]: With dead ends: 1724 [2021-08-12 19:51:39,180 INFO L226 Difference]: Without dead ends: 1577 [2021-08-12 19:51:39,181 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 681.5ms TimeCoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:51:39,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1577 states. [2021-08-12 19:51:39,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1577 to 1549. [2021-08-12 19:51:39,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1549 states, 1548 states have (on average 4.732558139534884) internal successors, (7326), 1548 states have internal predecessors, (7326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:39,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1549 states to 1549 states and 7326 transitions. [2021-08-12 19:51:39,444 INFO L78 Accepts]: Start accepts. Automaton has 1549 states and 7326 transitions. Word has length 27 [2021-08-12 19:51:39,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:51:39,444 INFO L482 AbstractCegarLoop]: Abstraction has 1549 states and 7326 transitions. [2021-08-12 19:51:39,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:39,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1549 states and 7326 transitions. [2021-08-12 19:51:39,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:51:39,447 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:51:39,447 INFO L550 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:51:39,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable559,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:51:39,647 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:51:39,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:51:39,647 INFO L82 PathProgramCache]: Analyzing trace with hash 2033600990, now seen corresponding path program 126 times [2021-08-12 19:51:39,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:51:39,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159062619] [2021-08-12 19:51:39,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:51:39,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:51:39,831 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:39,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:51:39,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159062619] [2021-08-12 19:51:39,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159062619] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:39,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704346678] [2021-08-12 19:51:39,831 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:51:39,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 19:51:39,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:51:39,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 19:51:39,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-08-12 19:51:40,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable562,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:51:40,165 WARN L547 AbstractCegarLoop]: Verification canceled [2021-08-12 19:51:40,167 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-12 19:51:40,168 WARN L188 ceAbstractionStarter]: Timeout [2021-08-12 19:51:40,168 INFO L202 PluginConnector]: Adding new model commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.08 07:51:40 BasicIcfg [2021-08-12 19:51:40,168 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-12 19:51:40,168 INFO L168 Benchmark]: Toolchain (without parser) took 573453.74 ms. Allocated memory was 219.2 MB in the beginning and 910.2 MB in the end (delta: 691.0 MB). Free memory was 199.3 MB in the beginning and 762.8 MB in the end (delta: -563.5 MB). Peak memory consumption was 128.9 MB. Max. memory is 8.0 GB. [2021-08-12 19:51:40,169 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 219.2 MB. Free memory is still 200.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-12 19:51:40,169 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.45 ms. Allocated memory is still 219.2 MB. Free memory was 199.3 MB in the beginning and 197.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-12 19:51:40,169 INFO L168 Benchmark]: Boogie Preprocessor took 34.68 ms. Allocated memory is still 219.2 MB. Free memory was 197.8 MB in the beginning and 196.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-12 19:51:40,169 INFO L168 Benchmark]: RCFGBuilder took 510.64 ms. Allocated memory is still 219.2 MB. Free memory was 196.6 MB in the beginning and 200.5 MB in the end (delta: -3.9 MB). Peak memory consumption was 36.9 MB. Max. memory is 8.0 GB. [2021-08-12 19:51:40,169 INFO L168 Benchmark]: TraceAbstraction took 572872.12 ms. Allocated memory was 219.2 MB in the beginning and 910.2 MB in the end (delta: 691.0 MB). Free memory was 200.0 MB in the beginning and 762.8 MB in the end (delta: -562.8 MB). Peak memory consumption was 129.8 MB. Max. memory is 8.0 GB. [2021-08-12 19:51:40,169 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 0.09 ms. Allocated memory is still 219.2 MB. Free memory is still 200.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 31.45 ms. Allocated memory is still 219.2 MB. Free memory was 199.3 MB in the beginning and 197.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.68 ms. Allocated memory is still 219.2 MB. Free memory was 197.8 MB in the beginning and 196.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 510.64 ms. Allocated memory is still 219.2 MB. Free memory was 196.6 MB in the beginning and 200.5 MB in the end (delta: -3.9 MB). Peak memory consumption was 36.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 572872.12 ms. Allocated memory was 219.2 MB in the beginning and 910.2 MB in the end (delta: 691.0 MB). Free memory was 200.0 MB in the beginning and 762.8 MB in the end (delta: -562.8 MB). Peak memory consumption was 129.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 172]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 28 with TraceHistMax 6,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 17 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 34 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 572778.4ms, OverallIterations: 169, TraceHistogramMax: 7, EmptinessCheckTime: 283.6ms, AutomataDifference: 284478.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 20.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6065 SDtfs, 9840 SDslu, 67350 SDs, 0 SdLazy, 35938 SolverSat, 2067 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 30939.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6167 GetRequests, 2546 SyntacticMatches, 9 SemanticMatches, 3612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13951 ImplicationChecksByTransitivity, 399281.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1575occurred in iteration=166, InterpolantAutomatonStates: 2186, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 18213.9ms AutomataMinimizationTime, 168 MinimizatonAttempts, 24199 StatesRemovedByMinimization, 163 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1271.7ms SsaConstructionTime, 3418.7ms SatisfiabilityAnalysisTime, 226720.1ms InterpolantComputationTime, 7926 NumberOfCodeBlocks, 7926 NumberOfCodeBlocksAsserted, 703 NumberOfCheckSat, 7594 ConstructedInterpolants, 396 QuantifiedInterpolants, 129335 SizeOfPredicates, 2162 NumberOfNonLiveVariables, 12131 ConjunctsInSsa, 2783 ConjunctsInUnsatCore, 332 InterpolantComputations, 4 PerfectInterpolantSequences, 1045/6526 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown