/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-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 20:18:48,409 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 20:18:48,412 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 20:18:48,452 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-13 20:18:48,453 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-13 20:18:48,455 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-13 20:18:48,457 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-13 20:18:48,462 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-13 20:18:48,465 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-13 20:18:48,468 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-13 20:18:48,469 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-13 20:18:48,470 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-13 20:18:48,470 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-13 20:18:48,472 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-13 20:18:48,473 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-13 20:18:48,475 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-13 20:18:48,477 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-13 20:18:48,478 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-13 20:18:48,480 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-13 20:18:48,497 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-13 20:18:48,498 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-13 20:18:48,499 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-13 20:18:48,501 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-13 20:18:48,503 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-13 20:18:48,508 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-13 20:18:48,508 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-13 20:18:48,508 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-13 20:18:48,510 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-13 20:18:48,510 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-13 20:18:48,510 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-13 20:18:48,511 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-13 20:18:48,511 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-13 20:18:48,512 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-13 20:18:48,513 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-13 20:18:48,514 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-13 20:18:48,514 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-13 20:18:48,514 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-13 20:18:48,514 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-13 20:18:48,514 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-13 20:18:48,515 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-13 20:18:48,516 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-13 20:18:48,519 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 [2021-07-13 20:18:48,548 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 20:18:48,548 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 20:18:48,548 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 20:18:48,548 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 20:18:48,550 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 20:18:48,550 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 20:18:48,550 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 20:18:48,551 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 20:18:48,551 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 20:18:48,551 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 20:18:48,552 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 20:18:48,552 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 20:18:48,552 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 20:18:48,552 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 20:18:48,552 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 20:18:48,552 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 20:18:48,552 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 20:18:48,552 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 20:18:48,553 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 20:18:48,553 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 20:18:48,553 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 20:18:48,553 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 20:18:48,553 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 20:18:48,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:18:48,553 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 20:18:48,554 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 20:18:48,554 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 20:18:48,554 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 20:18:48,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 20:18:48,554 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 20:18:48,554 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 20:18:48,554 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 20:18:48,849 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 20:18:48,866 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 20:18:48,868 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 20:18:48,869 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 20:18:48,870 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 20:18:48,871 INFO L432 ainManager$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 [2021-07-13 20:18:48,871 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-2.wvr.bpl' [2021-07-13 20:18:48,923 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 20:18:48,924 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 20:18:48,925 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 20:18:48,925 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 20:18:48,925 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 20:18:48,936 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 13.07 08:18:48" (1/1) ... [2021-07-13 20:18:48,945 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 13.07 08:18:48" (1/1) ... [2021-07-13 20:18:48,952 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 20:18:48,954 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 20:18:48,955 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 20:18:48,955 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 20:18:48,962 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:18:48" (1/1) ... [2021-07-13 20:18:48,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:18:48" (1/1) ... [2021-07-13 20:18:48,973 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:18:48" (1/1) ... [2021-07-13 20:18:48,973 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:18:48" (1/1) ... [2021-07-13 20:18:48,985 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:18:48" (1/1) ... [2021-07-13 20:18:48,988 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:18:48" (1/1) ... [2021-07-13 20:18:48,989 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:18:48" (1/1) ... [2021-07-13 20:18:48,990 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 20:18:48,990 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 20:18:48,990 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 20:18:48,990 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 20:18:49,001 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:18:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:18:49,062 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 20:18:49,062 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 20:18:49,063 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 20:18:49,063 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 20:18:49,063 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 20:18:49,063 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 20:18:49,063 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 20:18:49,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 20:18:49,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 20:18:49,063 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-13 20:18:49,063 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-13 20:18:49,063 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-13 20:18:49,063 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-07-13 20:18:49,064 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-07-13 20:18:49,064 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-07-13 20:18:49,064 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 20:18:49,521 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 20:18:49,522 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-07-13 20:18:49,522 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-07-13 20:18:49,523 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-07-13 20:18:49,523 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-07-13 20:18:49,523 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread4EXIT is neither atomic block end nor error location. [2021-07-13 20:18:49,524 INFO L202 PluginConnector]: Adding new model commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:18:49 BoogieIcfgContainer [2021-07-13 20:18:49,524 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 20:18:49,526 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 20:18:49,526 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 20:18:49,528 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 20:18:49,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:18:48" (1/2) ... [2021-07-13 20:18:49,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44b9a14b and model type commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:18:49, skipping insertion in model container [2021-07-13 20:18:49,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:18:49" (2/2) ... [2021-07-13 20:18:49,531 INFO L111 eAbstractionObserver]: Analyzing ICFG commit-2.wvr.bpl [2021-07-13 20:18:49,538 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 20:18:49,538 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 20:18:49,538 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 20:18:49,538 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 20:18:49,588 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-07-13 20:18:49,611 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-07-13 20:18:49,635 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 20:18:49,635 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 20:18:49,635 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 20:18:49,635 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 20:18:49,635 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 20:18:49,635 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 20:18:49,635 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 20:18:49,635 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 20:18:49,643 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 25 transitions, 82 flow [2021-07-13 20:18:49,658 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 49 states, 48 states have (on average 3.4375) internal successors, (165), 48 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:49,661 INFO L276 IsEmpty]: Start isEmpty. Operand has 49 states, 48 states have (on average 3.4375) internal successors, (165), 48 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:49,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 20:18:49,667 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:49,667 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:49,668 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:49,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:49,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1687097808, now seen corresponding path program 1 times [2021-07-13 20:18:49,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:49,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230165955] [2021-07-13 20:18:49,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:49,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:49,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:49,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:49,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230165955] [2021-07-13 20:18:49,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230165955] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:18:49,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:18:49,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 20:18:49,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608279005] [2021-07-13 20:18:49,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:18:49,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:49,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:18:49,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:18:49,808 INFO L87 Difference]: Start difference. First operand has 49 states, 48 states have (on average 3.4375) internal successors, (165), 48 states have internal predecessors, (165), 0 states have call successors, (0), 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) [2021-07-13 20:18:49,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:49,848 INFO L93 Difference]: Finished difference Result 94 states and 326 transitions. [2021-07-13 20:18:49,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:18:49,850 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 [2021-07-13 20:18:49,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:49,858 INFO L225 Difference]: With dead ends: 94 [2021-07-13 20:18:49,858 INFO L226 Difference]: Without dead ends: 89 [2021-07-13 20:18:49,860 INFO L764 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 [2021-07-13 20:18:49,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-07-13 20:18:49,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-07-13 20:18:49,897 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) [2021-07-13 20:18:49,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 312 transitions. [2021-07-13 20:18:49,900 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 312 transitions. Word has length 15 [2021-07-13 20:18:49,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:49,902 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 312 transitions. [2021-07-13 20:18:49,902 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) [2021-07-13 20:18:49,902 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 312 transitions. [2021-07-13 20:18:49,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 20:18:49,905 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:49,905 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:49,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 20:18:49,905 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:49,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:49,907 INFO L82 PathProgramCache]: Analyzing trace with hash -759854521, now seen corresponding path program 1 times [2021-07-13 20:18:49,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:49,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701469951] [2021-07-13 20:18:49,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:49,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:49,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:49,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:49,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701469951] [2021-07-13 20:18:49,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701469951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:49,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339070916] [2021-07-13 20:18:49,989 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 [2021-07-13 20:18:50,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:50,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 20:18:50,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:50,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:50,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339070916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:50,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:50,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-07-13 20:18:50,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101910167] [2021-07-13 20:18:50,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:18:50,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:50,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:18:50,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:18:50,228 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) [2021-07-13 20:18:50,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:50,269 INFO L93 Difference]: Finished difference Result 120 states and 425 transitions. [2021-07-13 20:18:50,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:18:50,270 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 [2021-07-13 20:18:50,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:50,273 INFO L225 Difference]: With dead ends: 120 [2021-07-13 20:18:50,273 INFO L226 Difference]: Without dead ends: 106 [2021-07-13 20:18:50,274 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:18:50,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-07-13 20:18:50,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2021-07-13 20:18:50,290 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) [2021-07-13 20:18:50,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 295 transitions. [2021-07-13 20:18:50,292 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 295 transitions. Word has length 16 [2021-07-13 20:18:50,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:50,292 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 295 transitions. [2021-07-13 20:18:50,292 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) [2021-07-13 20:18:50,292 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 295 transitions. [2021-07-13 20:18:50,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 20:18:50,293 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:50,293 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:50,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-13 20:18:50,510 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:50,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:50,511 INFO L82 PathProgramCache]: Analyzing trace with hash -263000223, now seen corresponding path program 1 times [2021-07-13 20:18:50,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:50,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38989912] [2021-07-13 20:18:50,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:50,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:50,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:50,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:50,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38989912] [2021-07-13 20:18:50,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38989912] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:18:50,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:18:50,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 20:18:50,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655483063] [2021-07-13 20:18:50,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:18:50,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:50,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:18:50,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:18:50,569 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) [2021-07-13 20:18:50,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:50,578 INFO L93 Difference]: Finished difference Result 129 states and 418 transitions. [2021-07-13 20:18:50,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:18:50,579 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 [2021-07-13 20:18:50,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:50,581 INFO L225 Difference]: With dead ends: 129 [2021-07-13 20:18:50,581 INFO L226 Difference]: Without dead ends: 121 [2021-07-13 20:18:50,581 INFO L764 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 [2021-07-13 20:18:50,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-07-13 20:18:50,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 98. [2021-07-13 20:18:50,595 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) [2021-07-13 20:18:50,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 337 transitions. [2021-07-13 20:18:50,596 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 337 transitions. Word has length 16 [2021-07-13 20:18:50,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:50,596 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 337 transitions. [2021-07-13 20:18:50,596 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) [2021-07-13 20:18:50,596 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 337 transitions. [2021-07-13 20:18:50,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 20:18:50,597 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:50,597 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:50,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 20:18:50,597 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:50,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:50,598 INFO L82 PathProgramCache]: Analyzing trace with hash 675491683, now seen corresponding path program 1 times [2021-07-13 20:18:50,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:50,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467830158] [2021-07-13 20:18:50,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:50,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:50,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:50,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:50,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467830158] [2021-07-13 20:18:50,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467830158] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:18:50,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:18:50,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 20:18:50,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685491750] [2021-07-13 20:18:50,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:18:50,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:50,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:18:50,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:18:50,632 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) [2021-07-13 20:18:50,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:50,646 INFO L93 Difference]: Finished difference Result 76 states and 237 transitions. [2021-07-13 20:18:50,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:18:50,647 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 [2021-07-13 20:18:50,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:50,647 INFO L225 Difference]: With dead ends: 76 [2021-07-13 20:18:50,647 INFO L226 Difference]: Without dead ends: 64 [2021-07-13 20:18:50,647 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:18:50,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-07-13 20:18:50,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-07-13 20:18:50,650 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) [2021-07-13 20:18:50,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 208 transitions. [2021-07-13 20:18:50,650 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 208 transitions. Word has length 16 [2021-07-13 20:18:50,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:50,651 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 208 transitions. [2021-07-13 20:18:50,651 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) [2021-07-13 20:18:50,651 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 208 transitions. [2021-07-13 20:18:50,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 20:18:50,653 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:50,653 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:50,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-13 20:18:50,654 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:50,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:50,654 INFO L82 PathProgramCache]: Analyzing trace with hash 135060591, now seen corresponding path program 1 times [2021-07-13 20:18:50,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:50,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415308834] [2021-07-13 20:18:50,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:50,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:50,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:50,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:50,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415308834] [2021-07-13 20:18:50,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415308834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:50,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094214453] [2021-07-13 20:18:50,698 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 [2021-07-13 20:18:50,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:50,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 20:18:50,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:50,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:50,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094214453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:50,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:50,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-07-13 20:18:50,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290166323] [2021-07-13 20:18:50,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:18:50,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:50,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:18:50,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:18:50,821 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) [2021-07-13 20:18:50,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:50,838 INFO L93 Difference]: Finished difference Result 115 states and 389 transitions. [2021-07-13 20:18:50,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:18:50,839 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 [2021-07-13 20:18:50,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:50,839 INFO L225 Difference]: With dead ends: 115 [2021-07-13 20:18:50,839 INFO L226 Difference]: Without dead ends: 108 [2021-07-13 20:18:50,840 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.7ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:18:50,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-07-13 20:18:50,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-07-13 20:18:50,847 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) [2021-07-13 20:18:50,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 367 transitions. [2021-07-13 20:18:50,847 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 367 transitions. Word has length 16 [2021-07-13 20:18:50,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:50,847 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 367 transitions. [2021-07-13 20:18:50,847 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) [2021-07-13 20:18:50,848 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 367 transitions. [2021-07-13 20:18:50,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 20:18:50,848 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:50,848 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:51,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:51,065 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:51,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:51,065 INFO L82 PathProgramCache]: Analyzing trace with hash -107519000, now seen corresponding path program 1 times [2021-07-13 20:18:51,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:51,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079848628] [2021-07-13 20:18:51,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:51,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:51,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:18:51,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:51,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079848628] [2021-07-13 20:18:51,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079848628] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:18:51,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:18:51,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 20:18:51,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163030777] [2021-07-13 20:18:51,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:18:51,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:51,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:18:51,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:18:51,134 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) [2021-07-13 20:18:51,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:51,142 INFO L93 Difference]: Finished difference Result 57 states and 166 transitions. [2021-07-13 20:18:51,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:18:51,142 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 [2021-07-13 20:18:51,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:51,143 INFO L225 Difference]: With dead ends: 57 [2021-07-13 20:18:51,143 INFO L226 Difference]: Without dead ends: 54 [2021-07-13 20:18:51,143 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:18:51,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-07-13 20:18:51,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-07-13 20:18:51,144 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) [2021-07-13 20:18:51,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 161 transitions. [2021-07-13 20:18:51,145 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 161 transitions. Word has length 17 [2021-07-13 20:18:51,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:51,145 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 161 transitions. [2021-07-13 20:18:51,145 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) [2021-07-13 20:18:51,145 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 161 transitions. [2021-07-13 20:18:51,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 20:18:51,146 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:51,146 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:51,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-13 20:18:51,146 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:51,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:51,147 INFO L82 PathProgramCache]: Analyzing trace with hash -2041236514, now seen corresponding path program 2 times [2021-07-13 20:18:51,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:51,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881056844] [2021-07-13 20:18:51,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:51,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:51,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:51,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881056844] [2021-07-13 20:18:51,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881056844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:51,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704118946] [2021-07-13 20:18:51,188 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 [2021-07-13 20:18:51,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:18:51,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:51,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:18:51,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:51,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:51,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704118946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:51,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:51,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-07-13 20:18:51,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104373402] [2021-07-13 20:18:51,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:18:51,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:51,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:18:51,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:18:51,353 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) [2021-07-13 20:18:51,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:51,412 INFO L93 Difference]: Finished difference Result 93 states and 298 transitions. [2021-07-13 20:18:51,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:18:51,412 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 [2021-07-13 20:18:51,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:51,413 INFO L225 Difference]: With dead ends: 93 [2021-07-13 20:18:51,413 INFO L226 Difference]: Without dead ends: 88 [2021-07-13 20:18:51,414 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:18:51,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-07-13 20:18:51,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-07-13 20:18:51,418 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) [2021-07-13 20:18:51,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 283 transitions. [2021-07-13 20:18:51,419 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 283 transitions. Word has length 17 [2021-07-13 20:18:51,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:51,419 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 283 transitions. [2021-07-13 20:18:51,419 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) [2021-07-13 20:18:51,419 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 283 transitions. [2021-07-13 20:18:51,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 20:18:51,420 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:51,423 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:51,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:51,625 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:51,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:51,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1146747481, now seen corresponding path program 3 times [2021-07-13 20:18:51,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:51,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044773445] [2021-07-13 20:18:51,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:51,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:51,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:51,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:51,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044773445] [2021-07-13 20:18:51,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044773445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:51,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595783477] [2021-07-13 20:18:51,684 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 [2021-07-13 20:18:51,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:18:51,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:51,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:18:51,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:51,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:51,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595783477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:51,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:51,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-07-13 20:18:51,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852345695] [2021-07-13 20:18:51,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:18:51,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:51,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:18:51,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:18:51,947 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) [2021-07-13 20:18:52,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:52,048 INFO L93 Difference]: Finished difference Result 144 states and 469 transitions. [2021-07-13 20:18:52,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:18:52,049 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 [2021-07-13 20:18:52,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:52,050 INFO L225 Difference]: With dead ends: 144 [2021-07-13 20:18:52,050 INFO L226 Difference]: Without dead ends: 135 [2021-07-13 20:18:52,050 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 143.8ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:18:52,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-07-13 20:18:52,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 106. [2021-07-13 20:18:52,053 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) [2021-07-13 20:18:52,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 370 transitions. [2021-07-13 20:18:52,054 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 370 transitions. Word has length 18 [2021-07-13 20:18:52,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:52,054 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 370 transitions. [2021-07-13 20:18:52,054 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) [2021-07-13 20:18:52,054 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 370 transitions. [2021-07-13 20:18:52,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 20:18:52,055 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:52,055 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:52,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:52,273 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:52,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:52,273 INFO L82 PathProgramCache]: Analyzing trace with hash 613124629, now seen corresponding path program 4 times [2021-07-13 20:18:52,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:52,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681694210] [2021-07-13 20:18:52,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:52,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:52,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:52,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:52,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681694210] [2021-07-13 20:18:52,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681694210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:52,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492583795] [2021-07-13 20:18:52,364 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 [2021-07-13 20:18:52,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:18:52,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:52,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:18:52,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:52,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:52,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492583795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:52,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:52,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-07-13 20:18:52,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120457011] [2021-07-13 20:18:52,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:18:52,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:52,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:18:52,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:18:52,497 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) [2021-07-13 20:18:52,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:52,533 INFO L93 Difference]: Finished difference Result 179 states and 628 transitions. [2021-07-13 20:18:52,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:18:52,533 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 [2021-07-13 20:18:52,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:52,534 INFO L225 Difference]: With dead ends: 179 [2021-07-13 20:18:52,534 INFO L226 Difference]: Without dead ends: 169 [2021-07-13 20:18:52,534 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:18:52,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-07-13 20:18:52,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 133. [2021-07-13 20:18:52,537 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) [2021-07-13 20:18:52,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 491 transitions. [2021-07-13 20:18:52,538 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 491 transitions. Word has length 18 [2021-07-13 20:18:52,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:52,538 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 491 transitions. [2021-07-13 20:18:52,538 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) [2021-07-13 20:18:52,538 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 491 transitions. [2021-07-13 20:18:52,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 20:18:52,539 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:52,539 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:52,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-13 20:18:52,755 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:52,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:52,756 INFO L82 PathProgramCache]: Analyzing trace with hash 64866445, now seen corresponding path program 1 times [2021-07-13 20:18:52,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:52,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418881074] [2021-07-13 20:18:52,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:52,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:52,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:52,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:52,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418881074] [2021-07-13 20:18:52,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418881074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:52,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358177712] [2021-07-13 20:18:52,798 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 [2021-07-13 20:18:52,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:52,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:18:52,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:52,952 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:52,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358177712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:52,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:52,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-07-13 20:18:52,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317124609] [2021-07-13 20:18:52,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:18:52,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:52,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:18:52,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:18:52,953 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) [2021-07-13 20:18:53,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:53,018 INFO L93 Difference]: Finished difference Result 214 states and 744 transitions. [2021-07-13 20:18:53,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:18:53,019 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 [2021-07-13 20:18:53,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:53,020 INFO L225 Difference]: With dead ends: 214 [2021-07-13 20:18:53,020 INFO L226 Difference]: Without dead ends: 205 [2021-07-13 20:18:53,020 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 96.4ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:18:53,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-07-13 20:18:53,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 162. [2021-07-13 20:18:53,027 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) [2021-07-13 20:18:53,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 604 transitions. [2021-07-13 20:18:53,030 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 604 transitions. Word has length 18 [2021-07-13 20:18:53,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:53,031 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 604 transitions. [2021-07-13 20:18:53,031 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) [2021-07-13 20:18:53,031 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 604 transitions. [2021-07-13 20:18:53,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 20:18:53,032 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:53,032 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:53,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:53,245 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:53,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:53,245 INFO L82 PathProgramCache]: Analyzing trace with hash 764509993, now seen corresponding path program 1 times [2021-07-13 20:18:53,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:53,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834270970] [2021-07-13 20:18:53,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:53,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:53,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:53,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:53,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834270970] [2021-07-13 20:18:53,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834270970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:53,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610360405] [2021-07-13 20:18:53,273 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 [2021-07-13 20:18:53,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:53,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:18:53,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:53,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:53,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610360405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:53,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:53,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-07-13 20:18:53,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681161913] [2021-07-13 20:18:53,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:18:53,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:53,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:18:53,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:18:53,423 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) [2021-07-13 20:18:53,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:53,435 INFO L93 Difference]: Finished difference Result 134 states and 469 transitions. [2021-07-13 20:18:53,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:18:53,435 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 [2021-07-13 20:18:53,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:53,436 INFO L225 Difference]: With dead ends: 134 [2021-07-13 20:18:53,436 INFO L226 Difference]: Without dead ends: 126 [2021-07-13 20:18:53,437 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:18:53,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-07-13 20:18:53,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-07-13 20:18:53,439 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) [2021-07-13 20:18:53,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 453 transitions. [2021-07-13 20:18:53,440 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 453 transitions. Word has length 18 [2021-07-13 20:18:53,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:53,440 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 453 transitions. [2021-07-13 20:18:53,440 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) [2021-07-13 20:18:53,440 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 453 transitions. [2021-07-13 20:18:53,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 20:18:53,440 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:53,440 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:53,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:53,657 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:53,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:53,658 INFO L82 PathProgramCache]: Analyzing trace with hash 806923496, now seen corresponding path program 2 times [2021-07-13 20:18:53,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:53,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660147012] [2021-07-13 20:18:53,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:53,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:53,751 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:53,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:53,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660147012] [2021-07-13 20:18:53,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660147012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:53,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552575467] [2021-07-13 20:18:53,751 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 [2021-07-13 20:18:53,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:18:53,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:53,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:18:53,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:53,873 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 [2021-07-13 20:18:53,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:53,877 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 [2021-07-13 20:18:53,878 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:53,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:53,913 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. [2021-07-13 20:18:53,914 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:57 [2021-07-13 20:18:54,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:54,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552575467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:54,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:54,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-07-13 20:18:54,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065509034] [2021-07-13 20:18:54,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:18:54,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:54,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:18:54,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:18:54,035 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) [2021-07-13 20:18:54,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:54,212 INFO L93 Difference]: Finished difference Result 144 states and 499 transitions. [2021-07-13 20:18:54,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:18:54,212 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 [2021-07-13 20:18:54,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:54,214 INFO L225 Difference]: With dead ends: 144 [2021-07-13 20:18:54,214 INFO L226 Difference]: Without dead ends: 141 [2021-07-13 20:18:54,214 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 258.5ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:18:54,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-07-13 20:18:54,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 133. [2021-07-13 20:18:54,217 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) [2021-07-13 20:18:54,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 472 transitions. [2021-07-13 20:18:54,218 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 472 transitions. Word has length 19 [2021-07-13 20:18:54,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:54,218 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 472 transitions. [2021-07-13 20:18:54,218 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) [2021-07-13 20:18:54,218 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 472 transitions. [2021-07-13 20:18:54,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 20:18:54,219 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:54,219 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:54,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-13 20:18:54,444 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:54,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:54,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1447544248, now seen corresponding path program 2 times [2021-07-13 20:18:54,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:54,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895923311] [2021-07-13 20:18:54,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:54,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:54,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:54,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:54,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895923311] [2021-07-13 20:18:54,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895923311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:54,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907908996] [2021-07-13 20:18:54,502 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 [2021-07-13 20:18:54,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:18:54,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:54,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:18:54,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:54,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:54,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907908996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:54,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:54,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-07-13 20:18:54,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778163019] [2021-07-13 20:18:54,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:18:54,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:54,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:18:54,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:18:54,753 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) [2021-07-13 20:18:54,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:54,842 INFO L93 Difference]: Finished difference Result 261 states and 960 transitions. [2021-07-13 20:18:54,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:18:54,842 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 [2021-07-13 20:18:54,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:54,844 INFO L225 Difference]: With dead ends: 261 [2021-07-13 20:18:54,844 INFO L226 Difference]: Without dead ends: 256 [2021-07-13 20:18:54,844 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 167.0ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:18:54,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-07-13 20:18:54,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 169. [2021-07-13 20:18:54,849 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) [2021-07-13 20:18:54,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 662 transitions. [2021-07-13 20:18:54,849 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 662 transitions. Word has length 19 [2021-07-13 20:18:54,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:54,850 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 662 transitions. [2021-07-13 20:18:54,850 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) [2021-07-13 20:18:54,850 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 662 transitions. [2021-07-13 20:18:54,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 20:18:54,851 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:54,851 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:55,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-13 20:18:55,065 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:55,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:55,065 INFO L82 PathProgramCache]: Analyzing trace with hash 820488117, now seen corresponding path program 5 times [2021-07-13 20:18:55,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:55,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350961977] [2021-07-13 20:18:55,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:55,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:55,156 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:55,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:55,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350961977] [2021-07-13 20:18:55,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350961977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:55,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565903215] [2021-07-13 20:18:55,157 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 [2021-07-13 20:18:55,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:18:55,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:55,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:18:55,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:55,272 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 [2021-07-13 20:18:55,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:55,275 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 [2021-07-13 20:18:55,276 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:55,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:55,297 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. [2021-07-13 20:18:55,297 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:57 [2021-07-13 20:18:55,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:18:55,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565903215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:55,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:55,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-07-13 20:18:55,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865963497] [2021-07-13 20:18:55,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:18:55,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:55,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:18:55,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:18:55,392 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) [2021-07-13 20:18:55,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:55,578 INFO L93 Difference]: Finished difference Result 287 states and 1060 transitions. [2021-07-13 20:18:55,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:18:55,578 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 [2021-07-13 20:18:55,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:55,580 INFO L225 Difference]: With dead ends: 287 [2021-07-13 20:18:55,580 INFO L226 Difference]: Without dead ends: 275 [2021-07-13 20:18:55,580 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 240.2ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:18:55,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-07-13 20:18:55,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 189. [2021-07-13 20:18:55,585 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) [2021-07-13 20:18:55,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 752 transitions. [2021-07-13 20:18:55,586 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 752 transitions. Word has length 20 [2021-07-13 20:18:55,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:55,586 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 752 transitions. [2021-07-13 20:18:55,586 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) [2021-07-13 20:18:55,586 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 752 transitions. [2021-07-13 20:18:55,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 20:18:55,587 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:55,587 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:55,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:55,789 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:55,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:55,790 INFO L82 PathProgramCache]: Analyzing trace with hash 924426037, now seen corresponding path program 6 times [2021-07-13 20:18:55,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:55,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210932208] [2021-07-13 20:18:55,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:55,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:55,866 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:55,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:55,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210932208] [2021-07-13 20:18:55,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210932208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:55,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41535977] [2021-07-13 20:18:55,867 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:18:55,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:18:55,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:55,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 20:18:55,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:56,011 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:56,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41535977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:56,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:56,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-07-13 20:18:56,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675042071] [2021-07-13 20:18:56,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:18:56,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:56,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:18:56,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:18:56,012 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) [2021-07-13 20:18:56,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:56,080 INFO L93 Difference]: Finished difference Result 211 states and 810 transitions. [2021-07-13 20:18:56,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:18:56,080 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 [2021-07-13 20:18:56,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:56,081 INFO L225 Difference]: With dead ends: 211 [2021-07-13 20:18:56,081 INFO L226 Difference]: Without dead ends: 207 [2021-07-13 20:18:56,081 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 129.0ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:18:56,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-07-13 20:18:56,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 191. [2021-07-13 20:18:56,085 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) [2021-07-13 20:18:56,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 754 transitions. [2021-07-13 20:18:56,086 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 754 transitions. Word has length 20 [2021-07-13 20:18:56,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:56,086 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 754 transitions. [2021-07-13 20:18:56,086 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) [2021-07-13 20:18:56,086 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 754 transitions. [2021-07-13 20:18:56,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 20:18:56,086 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:56,086 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:56,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-13 20:18:56,303 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:56,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:56,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1959111699, now seen corresponding path program 3 times [2021-07-13 20:18:56,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:56,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631886638] [2021-07-13 20:18:56,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:56,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:56,419 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:56,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:56,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631886638] [2021-07-13 20:18:56,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631886638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:56,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094734473] [2021-07-13 20:18:56,420 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 [2021-07-13 20:18:56,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:18:56,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:56,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:18:56,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:56,554 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 [2021-07-13 20:18:56,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:56,558 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 [2021-07-13 20:18:56,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:56,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:56,581 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. [2021-07-13 20:18:56,582 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:57 [2021-07-13 20:18:56,701 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:56,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094734473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:56,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:56,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-07-13 20:18:56,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324138754] [2021-07-13 20:18:56,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:18:56,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:56,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:18:56,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:18:56,702 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) [2021-07-13 20:18:56,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:56,810 INFO L93 Difference]: Finished difference Result 509 states and 2067 transitions. [2021-07-13 20:18:56,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:18:56,810 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 [2021-07-13 20:18:56,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:56,813 INFO L225 Difference]: With dead ends: 509 [2021-07-13 20:18:56,813 INFO L226 Difference]: Without dead ends: 504 [2021-07-13 20:18:56,813 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 172.9ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:18:56,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-07-13 20:18:56,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 259. [2021-07-13 20:18:56,833 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) [2021-07-13 20:18:56,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 1130 transitions. [2021-07-13 20:18:56,834 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 1130 transitions. Word has length 20 [2021-07-13 20:18:56,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:56,834 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 1130 transitions. [2021-07-13 20:18:56,834 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) [2021-07-13 20:18:56,834 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 1130 transitions. [2021-07-13 20:18:56,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 20:18:56,835 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:56,835 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:57,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-13 20:18:57,036 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:57,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:57,036 INFO L82 PathProgramCache]: Analyzing trace with hash -626942165, now seen corresponding path program 3 times [2021-07-13 20:18:57,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:57,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79752301] [2021-07-13 20:18:57,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:57,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:57,080 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:57,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:57,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79752301] [2021-07-13 20:18:57,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79752301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:57,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248163504] [2021-07-13 20:18:57,081 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 [2021-07-13 20:18:57,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:18:57,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:57,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 20:18:57,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:57,337 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:57,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248163504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:57,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:57,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-07-13 20:18:57,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711459400] [2021-07-13 20:18:57,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:18:57,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:57,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:18:57,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:18:57,338 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) [2021-07-13 20:18:57,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:57,461 INFO L93 Difference]: Finished difference Result 494 states and 2044 transitions. [2021-07-13 20:18:57,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:18:57,462 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 [2021-07-13 20:18:57,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:57,464 INFO L225 Difference]: With dead ends: 494 [2021-07-13 20:18:57,464 INFO L226 Difference]: Without dead ends: 489 [2021-07-13 20:18:57,465 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 187.1ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:18:57,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-07-13 20:18:57,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 286. [2021-07-13 20:18:57,472 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) [2021-07-13 20:18:57,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 1281 transitions. [2021-07-13 20:18:57,473 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 1281 transitions. Word has length 20 [2021-07-13 20:18:57,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:57,473 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 1281 transitions. [2021-07-13 20:18:57,473 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) [2021-07-13 20:18:57,473 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 1281 transitions. [2021-07-13 20:18:57,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 20:18:57,474 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:57,474 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:57,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-07-13 20:18:57,689 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:57,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:57,689 INFO L82 PathProgramCache]: Analyzing trace with hash -760999699, now seen corresponding path program 4 times [2021-07-13 20:18:57,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:57,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775169219] [2021-07-13 20:18:57,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:57,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:57,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:57,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:57,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775169219] [2021-07-13 20:18:57,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775169219] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:57,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77200160] [2021-07-13 20:18:57,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:18:57,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:18:57,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:57,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:18:57,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:57,950 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:57,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77200160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:57,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:57,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-07-13 20:18:57,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002886716] [2021-07-13 20:18:57,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:18:57,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:57,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:18:57,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:18:57,952 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) [2021-07-13 20:18:58,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:58,004 INFO L93 Difference]: Finished difference Result 345 states and 1496 transitions. [2021-07-13 20:18:58,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:18:58,005 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 [2021-07-13 20:18:58,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:58,008 INFO L225 Difference]: With dead ends: 345 [2021-07-13 20:18:58,008 INFO L226 Difference]: Without dead ends: 340 [2021-07-13 20:18:58,008 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 94.3ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:18:58,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-07-13 20:18:58,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 294. [2021-07-13 20:18:58,014 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) [2021-07-13 20:18:58,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 1320 transitions. [2021-07-13 20:18:58,016 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 1320 transitions. Word has length 20 [2021-07-13 20:18:58,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:58,016 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 1320 transitions. [2021-07-13 20:18:58,016 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) [2021-07-13 20:18:58,016 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 1320 transitions. [2021-07-13 20:18:58,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:18:58,017 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:58,017 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:58,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:58,233 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:58,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:58,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1175269464, now seen corresponding path program 7 times [2021-07-13 20:18:58,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:58,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420796353] [2021-07-13 20:18:58,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:58,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:58,337 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:18:58,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:58,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420796353] [2021-07-13 20:18:58,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420796353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:58,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625666163] [2021-07-13 20:18:58,337 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 [2021-07-13 20:18:58,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:58,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:18:58,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:58,509 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 [2021-07-13 20:18:58,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:58,514 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 [2021-07-13 20:18:58,515 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:58,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:58,543 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 [2021-07-13 20:18:58,544 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:58,547 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 [2021-07-13 20:18:58,548 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:58,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:58,572 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. [2021-07-13 20:18:58,573 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:85, output treesize:57 [2021-07-13 20:18:58,647 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:18:58,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625666163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:58,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:58,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-07-13 20:18:58,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260863602] [2021-07-13 20:18:58,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:18:58,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:58,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:18:58,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:18:58,657 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) [2021-07-13 20:18:58,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:58,870 INFO L93 Difference]: Finished difference Result 411 states and 1659 transitions. [2021-07-13 20:18:58,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:18:58,870 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 [2021-07-13 20:18:58,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:58,872 INFO L225 Difference]: With dead ends: 411 [2021-07-13 20:18:58,872 INFO L226 Difference]: Without dead ends: 397 [2021-07-13 20:18:58,873 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 319.7ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:18:58,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-07-13 20:18:58,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 322. [2021-07-13 20:18:58,884 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) [2021-07-13 20:18:58,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 1392 transitions. [2021-07-13 20:18:58,885 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 1392 transitions. Word has length 21 [2021-07-13 20:18:58,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:58,885 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 1392 transitions. [2021-07-13 20:18:58,885 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) [2021-07-13 20:18:58,885 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 1392 transitions. [2021-07-13 20:18:58,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:18:58,886 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:58,886 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:59,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-13 20:18:59,093 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:59,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:59,093 INFO L82 PathProgramCache]: Analyzing trace with hash -105496252, now seen corresponding path program 4 times [2021-07-13 20:18:59,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:59,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707672075] [2021-07-13 20:18:59,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:59,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:59,180 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:59,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:59,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707672075] [2021-07-13 20:18:59,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707672075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:59,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236829519] [2021-07-13 20:18:59,180 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 [2021-07-13 20:18:59,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:18:59,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:59,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:18:59,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:59,314 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 [2021-07-13 20:18:59,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:59,318 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 [2021-07-13 20:18:59,319 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:59,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:59,341 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. [2021-07-13 20:18:59,342 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:57 [2021-07-13 20:18:59,483 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:59,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236829519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:59,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:59,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 20:18:59,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972056609] [2021-07-13 20:18:59,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:18:59,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:59,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:18:59,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:18:59,484 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) [2021-07-13 20:18:59,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:59,741 INFO L93 Difference]: Finished difference Result 868 states and 3551 transitions. [2021-07-13 20:18:59,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:18:59,742 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 [2021-07-13 20:18:59,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:59,746 INFO L225 Difference]: With dead ends: 868 [2021-07-13 20:18:59,746 INFO L226 Difference]: Without dead ends: 841 [2021-07-13 20:18:59,747 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 303.2ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:18:59,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-07-13 20:18:59,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 415. [2021-07-13 20:18:59,758 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) [2021-07-13 20:18:59,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1882 transitions. [2021-07-13 20:18:59,760 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1882 transitions. Word has length 21 [2021-07-13 20:18:59,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:59,760 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1882 transitions. [2021-07-13 20:18:59,760 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) [2021-07-13 20:18:59,760 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1882 transitions. [2021-07-13 20:18:59,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:18:59,761 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:59,761 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:59,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-13 20:18:59,965 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:59,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:59,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1429441592, now seen corresponding path program 5 times [2021-07-13 20:18:59,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:59,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378207745] [2021-07-13 20:18:59,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:59,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:00,041 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:00,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:00,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378207745] [2021-07-13 20:19:00,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378207745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:00,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626239998] [2021-07-13 20:19:00,041 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 [2021-07-13 20:19:00,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:19:00,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:00,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 20:19:00,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:00,267 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:00,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626239998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:00,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:00,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-13 20:19:00,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994486078] [2021-07-13 20:19:00,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:19:00,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:00,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:19:00,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:19:00,268 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) [2021-07-13 20:19:00,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:00,318 INFO L93 Difference]: Finished difference Result 431 states and 1910 transitions. [2021-07-13 20:19:00,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:19:00,319 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 [2021-07-13 20:19:00,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:00,321 INFO L225 Difference]: With dead ends: 431 [2021-07-13 20:19:00,321 INFO L226 Difference]: Without dead ends: 429 [2021-07-13 20:19:00,321 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 171.2ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:19:00,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-07-13 20:19:00,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 415. [2021-07-13 20:19:00,329 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) [2021-07-13 20:19:00,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1876 transitions. [2021-07-13 20:19:00,330 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1876 transitions. Word has length 21 [2021-07-13 20:19:00,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:00,330 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1876 transitions. [2021-07-13 20:19:00,331 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) [2021-07-13 20:19:00,331 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1876 transitions. [2021-07-13 20:19:00,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:19:00,332 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:00,332 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:00,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:00,543 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:00,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:00,543 INFO L82 PathProgramCache]: Analyzing trace with hash -958081368, now seen corresponding path program 5 times [2021-07-13 20:19:00,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:00,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97541494] [2021-07-13 20:19:00,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:00,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:00,605 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:00,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:00,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97541494] [2021-07-13 20:19:00,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97541494] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:00,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195440970] [2021-07-13 20:19:00,606 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 [2021-07-13 20:19:00,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:19:00,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:00,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:19:00,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:00,877 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:00,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195440970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:00,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:00,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-13 20:19:00,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323820020] [2021-07-13 20:19:00,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:19:00,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:00,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:19:00,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:19:00,879 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) [2021-07-13 20:19:01,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:01,028 INFO L93 Difference]: Finished difference Result 1022 states and 4384 transitions. [2021-07-13 20:19:01,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:19:01,028 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 [2021-07-13 20:19:01,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:01,033 INFO L225 Difference]: With dead ends: 1022 [2021-07-13 20:19:01,033 INFO L226 Difference]: Without dead ends: 1006 [2021-07-13 20:19:01,035 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 237.1ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:19:01,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2021-07-13 20:19:01,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 655. [2021-07-13 20:19:01,055 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) [2021-07-13 20:19:01,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 3134 transitions. [2021-07-13 20:19:01,058 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 3134 transitions. Word has length 21 [2021-07-13 20:19:01,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:01,058 INFO L482 AbstractCegarLoop]: Abstraction has 655 states and 3134 transitions. [2021-07-13 20:19:01,058 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) [2021-07-13 20:19:01,058 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 3134 transitions. [2021-07-13 20:19:01,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:19:01,061 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:01,061 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:01,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-07-13 20:19:01,278 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:01,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:01,278 INFO L82 PathProgramCache]: Analyzing trace with hash -536313780, now seen corresponding path program 6 times [2021-07-13 20:19:01,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:01,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591601541] [2021-07-13 20:19:01,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:01,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:01,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:01,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:01,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591601541] [2021-07-13 20:19:01,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591601541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:01,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382806497] [2021-07-13 20:19:01,390 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 [2021-07-13 20:19:01,438 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:19:01,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:01,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 20:19:01,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:01,587 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:01,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382806497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:01,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:01,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-07-13 20:19:01,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523421524] [2021-07-13 20:19:01,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:19:01,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:01,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:19:01,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:19:01,588 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) [2021-07-13 20:19:01,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:01,691 INFO L93 Difference]: Finished difference Result 715 states and 3326 transitions. [2021-07-13 20:19:01,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:19:01,692 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 [2021-07-13 20:19:01,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:01,695 INFO L225 Difference]: With dead ends: 715 [2021-07-13 20:19:01,696 INFO L226 Difference]: Without dead ends: 713 [2021-07-13 20:19:01,696 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 217.7ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:19:01,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-07-13 20:19:01,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 663. [2021-07-13 20:19:01,708 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) [2021-07-13 20:19:01,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 3160 transitions. [2021-07-13 20:19:01,710 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 3160 transitions. Word has length 21 [2021-07-13 20:19:01,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:01,711 INFO L482 AbstractCegarLoop]: Abstraction has 663 states and 3160 transitions. [2021-07-13 20:19:01,711 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) [2021-07-13 20:19:01,711 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 3160 transitions. [2021-07-13 20:19:01,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:19:01,712 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:01,712 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:01,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-07-13 20:19:01,932 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:01,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:01,933 INFO L82 PathProgramCache]: Analyzing trace with hash -818897626, now seen corresponding path program 7 times [2021-07-13 20:19:01,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:01,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604976652] [2021-07-13 20:19:01,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:01,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:02,008 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:02,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:02,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604976652] [2021-07-13 20:19:02,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604976652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:02,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83132347] [2021-07-13 20:19:02,009 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 [2021-07-13 20:19:02,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:02,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 20:19:02,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:02,159 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 [2021-07-13 20:19:02,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:02,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:02,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:02,168 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:22 [2021-07-13 20:19:02,195 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:02,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83132347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:02,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:02,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-07-13 20:19:02,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054727679] [2021-07-13 20:19:02,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:19:02,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:02,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:19:02,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:19:02,196 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) [2021-07-13 20:19:02,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:02,333 INFO L93 Difference]: Finished difference Result 745 states and 3433 transitions. [2021-07-13 20:19:02,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:19:02,333 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 [2021-07-13 20:19:02,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:02,337 INFO L225 Difference]: With dead ends: 745 [2021-07-13 20:19:02,338 INFO L226 Difference]: Without dead ends: 740 [2021-07-13 20:19:02,338 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 194.4ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:19:02,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-07-13 20:19:02,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 663. [2021-07-13 20:19:02,354 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) [2021-07-13 20:19:02,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 3160 transitions. [2021-07-13 20:19:02,357 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 3160 transitions. Word has length 21 [2021-07-13 20:19:02,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:02,357 INFO L482 AbstractCegarLoop]: Abstraction has 663 states and 3160 transitions. [2021-07-13 20:19:02,357 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) [2021-07-13 20:19:02,357 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 3160 transitions. [2021-07-13 20:19:02,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:19:02,359 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:02,359 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:02,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-13 20:19:02,577 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:02,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:02,577 INFO L82 PathProgramCache]: Analyzing trace with hash -979212920, now seen corresponding path program 8 times [2021-07-13 20:19:02,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:02,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751375096] [2021-07-13 20:19:02,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:02,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:02,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:02,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:02,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751375096] [2021-07-13 20:19:02,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751375096] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:02,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289165805] [2021-07-13 20:19:02,716 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 [2021-07-13 20:19:02,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:19:02,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:02,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 20:19:02,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:02,920 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:02,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289165805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:02,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:02,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-07-13 20:19:02,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268607237] [2021-07-13 20:19:02,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:19:02,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:02,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:19:02,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:19:02,921 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) [2021-07-13 20:19:03,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:03,129 INFO L93 Difference]: Finished difference Result 706 states and 3296 transitions. [2021-07-13 20:19:03,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:19:03,129 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 [2021-07-13 20:19:03,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:03,133 INFO L225 Difference]: With dead ends: 706 [2021-07-13 20:19:03,133 INFO L226 Difference]: Without dead ends: 704 [2021-07-13 20:19:03,133 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 350.7ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:19:03,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-07-13 20:19:03,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 666. [2021-07-13 20:19:03,146 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) [2021-07-13 20:19:03,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 3175 transitions. [2021-07-13 20:19:03,148 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 3175 transitions. Word has length 21 [2021-07-13 20:19:03,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:03,148 INFO L482 AbstractCegarLoop]: Abstraction has 666 states and 3175 transitions. [2021-07-13 20:19:03,148 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) [2021-07-13 20:19:03,148 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 3175 transitions. [2021-07-13 20:19:03,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:19:03,150 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:03,150 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:03,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-13 20:19:03,365 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:03,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:03,365 INFO L82 PathProgramCache]: Analyzing trace with hash -278148342, now seen corresponding path program 9 times [2021-07-13 20:19:03,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:03,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281753566] [2021-07-13 20:19:03,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:03,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:03,448 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:03,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:03,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281753566] [2021-07-13 20:19:03,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281753566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:03,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47545504] [2021-07-13 20:19:03,449 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 [2021-07-13 20:19:03,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:19:03,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:03,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:19:03,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:03,683 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:03,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47545504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:03,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:03,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-07-13 20:19:03,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80165771] [2021-07-13 20:19:03,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:19:03,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:03,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:19:03,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:19:03,684 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) [2021-07-13 20:19:03,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:03,910 INFO L93 Difference]: Finished difference Result 1302 states and 5669 transitions. [2021-07-13 20:19:03,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:19:03,911 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 [2021-07-13 20:19:03,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:03,917 INFO L225 Difference]: With dead ends: 1302 [2021-07-13 20:19:03,917 INFO L226 Difference]: Without dead ends: 1272 [2021-07-13 20:19:03,917 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 300.0ms TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:19:03,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2021-07-13 20:19:03,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 737. [2021-07-13 20:19:03,935 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) [2021-07-13 20:19:03,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 3529 transitions. [2021-07-13 20:19:03,937 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 3529 transitions. Word has length 21 [2021-07-13 20:19:03,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:03,938 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 3529 transitions. [2021-07-13 20:19:03,938 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) [2021-07-13 20:19:03,938 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 3529 transitions. [2021-07-13 20:19:03,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:19:03,939 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:03,940 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:04,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:04,153 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:04,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:04,153 INFO L82 PathProgramCache]: Analyzing trace with hash -781165444, now seen corresponding path program 1 times [2021-07-13 20:19:04,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:04,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341759050] [2021-07-13 20:19:04,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:04,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:04,227 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:04,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:04,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341759050] [2021-07-13 20:19:04,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341759050] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:04,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719520932] [2021-07-13 20:19:04,228 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 [2021-07-13 20:19:04,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:04,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:19:04,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:04,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:19:04,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719520932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:04,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:04,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-07-13 20:19:04,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981647293] [2021-07-13 20:19:04,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:19:04,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:04,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:19:04,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:19:04,568 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) [2021-07-13 20:19:04,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:04,892 INFO L93 Difference]: Finished difference Result 910 states and 3945 transitions. [2021-07-13 20:19:04,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:19:04,893 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 [2021-07-13 20:19:04,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:04,897 INFO L225 Difference]: With dead ends: 910 [2021-07-13 20:19:04,897 INFO L226 Difference]: Without dead ends: 881 [2021-07-13 20:19:04,897 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 413.5ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:19:04,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2021-07-13 20:19:04,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 599. [2021-07-13 20:19:04,909 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) [2021-07-13 20:19:04,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 2874 transitions. [2021-07-13 20:19:04,911 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 2874 transitions. Word has length 21 [2021-07-13 20:19:04,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:04,911 INFO L482 AbstractCegarLoop]: Abstraction has 599 states and 2874 transitions. [2021-07-13 20:19:04,911 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) [2021-07-13 20:19:04,911 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 2874 transitions. [2021-07-13 20:19:04,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:19:04,913 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:04,913 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:05,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-13 20:19:05,129 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:05,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:05,129 INFO L82 PathProgramCache]: Analyzing trace with hash -488176887, now seen corresponding path program 6 times [2021-07-13 20:19:05,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:05,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309859540] [2021-07-13 20:19:05,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:05,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:05,241 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:05,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:05,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309859540] [2021-07-13 20:19:05,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309859540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:05,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111415189] [2021-07-13 20:19:05,242 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 [2021-07-13 20:19:05,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:19:05,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:05,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:19:05,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:05,506 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:05,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111415189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:05,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:05,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 20:19:05,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738188432] [2021-07-13 20:19:05,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:19:05,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:05,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:19:05,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:19:05,509 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) [2021-07-13 20:19:05,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:05,734 INFO L93 Difference]: Finished difference Result 792 states and 3525 transitions. [2021-07-13 20:19:05,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:19:05,734 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 [2021-07-13 20:19:05,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:05,738 INFO L225 Difference]: With dead ends: 792 [2021-07-13 20:19:05,738 INFO L226 Difference]: Without dead ends: 762 [2021-07-13 20:19:05,738 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 330.0ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:19:05,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-07-13 20:19:05,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 605. [2021-07-13 20:19:05,749 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) [2021-07-13 20:19:05,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 2912 transitions. [2021-07-13 20:19:05,751 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 2912 transitions. Word has length 22 [2021-07-13 20:19:05,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:05,751 INFO L482 AbstractCegarLoop]: Abstraction has 605 states and 2912 transitions. [2021-07-13 20:19:05,751 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) [2021-07-13 20:19:05,751 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 2912 transitions. [2021-07-13 20:19:05,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:19:05,752 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:05,752 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:05,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:05,969 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:05,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:05,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1712214825, now seen corresponding path program 10 times [2021-07-13 20:19:05,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:05,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476384202] [2021-07-13 20:19:05,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:05,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:06,053 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:06,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:06,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476384202] [2021-07-13 20:19:06,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476384202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:06,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665396694] [2021-07-13 20:19:06,054 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 [2021-07-13 20:19:06,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:19:06,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:06,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:19:06,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:06,191 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 [2021-07-13 20:19:06,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:06,195 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 [2021-07-13 20:19:06,196 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:06,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:06,215 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. [2021-07-13 20:19:06,215 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:75, output treesize:61 [2021-07-13 20:19:06,353 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:06,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665396694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:06,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:06,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-07-13 20:19:06,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951035059] [2021-07-13 20:19:06,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:19:06,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:06,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:19:06,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:19:06,354 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) [2021-07-13 20:19:06,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:06,568 INFO L93 Difference]: Finished difference Result 1203 states and 5352 transitions. [2021-07-13 20:19:06,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:19:06,569 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 [2021-07-13 20:19:06,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:06,575 INFO L225 Difference]: With dead ends: 1203 [2021-07-13 20:19:06,575 INFO L226 Difference]: Without dead ends: 1179 [2021-07-13 20:19:06,575 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 327.7ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:19:06,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2021-07-13 20:19:06,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 781. [2021-07-13 20:19:06,592 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) [2021-07-13 20:19:06,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 3869 transitions. [2021-07-13 20:19:06,595 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 3869 transitions. Word has length 22 [2021-07-13 20:19:06,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:06,595 INFO L482 AbstractCegarLoop]: Abstraction has 781 states and 3869 transitions. [2021-07-13 20:19:06,595 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) [2021-07-13 20:19:06,595 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 3869 transitions. [2021-07-13 20:19:06,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:19:06,597 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:06,597 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:06,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-07-13 20:19:06,817 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:06,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:06,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1902819445, now seen corresponding path program 11 times [2021-07-13 20:19:06,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:06,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281043990] [2021-07-13 20:19:06,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:06,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:06,938 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:06,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:06,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281043990] [2021-07-13 20:19:06,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281043990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:06,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905451157] [2021-07-13 20:19:06,939 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 [2021-07-13 20:19:06,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:19:06,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:06,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 20:19:06,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:07,267 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:07,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905451157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:07,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:07,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 20:19:07,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190123757] [2021-07-13 20:19:07,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:19:07,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:07,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:19:07,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:19:07,269 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) [2021-07-13 20:19:07,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:07,643 INFO L93 Difference]: Finished difference Result 869 states and 4146 transitions. [2021-07-13 20:19:07,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:19:07,643 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 [2021-07-13 20:19:07,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:07,647 INFO L225 Difference]: With dead ends: 869 [2021-07-13 20:19:07,647 INFO L226 Difference]: Without dead ends: 864 [2021-07-13 20:19:07,649 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 531.0ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:19:07,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2021-07-13 20:19:07,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 789. [2021-07-13 20:19:07,661 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) [2021-07-13 20:19:07,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 3911 transitions. [2021-07-13 20:19:07,664 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 3911 transitions. Word has length 22 [2021-07-13 20:19:07,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:07,664 INFO L482 AbstractCegarLoop]: Abstraction has 789 states and 3911 transitions. [2021-07-13 20:19:07,664 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) [2021-07-13 20:19:07,664 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 3911 transitions. [2021-07-13 20:19:07,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:19:07,666 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:07,666 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:07,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-13 20:19:07,881 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:07,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:07,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1681233933, now seen corresponding path program 12 times [2021-07-13 20:19:07,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:07,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793310157] [2021-07-13 20:19:07,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:07,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:08,013 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:08,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:08,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793310157] [2021-07-13 20:19:08,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793310157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:08,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661118961] [2021-07-13 20:19:08,014 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 [2021-07-13 20:19:08,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:19:08,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:08,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 20:19:08,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:08,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-13 20:19:08,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:08,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:08,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:08,238 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-07-13 20:19:08,288 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:08,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661118961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:08,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:08,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 20:19:08,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26677828] [2021-07-13 20:19:08,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:19:08,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:08,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:19:08,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:19:08,290 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) [2021-07-13 20:19:08,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:08,575 INFO L93 Difference]: Finished difference Result 1170 states and 5326 transitions. [2021-07-13 20:19:08,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:19:08,576 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 [2021-07-13 20:19:08,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:08,581 INFO L225 Difference]: With dead ends: 1170 [2021-07-13 20:19:08,581 INFO L226 Difference]: Without dead ends: 1162 [2021-07-13 20:19:08,581 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 423.9ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:19:08,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2021-07-13 20:19:08,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 809. [2021-07-13 20:19:08,601 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) [2021-07-13 20:19:08,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 4001 transitions. [2021-07-13 20:19:08,605 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 4001 transitions. Word has length 22 [2021-07-13 20:19:08,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:08,605 INFO L482 AbstractCegarLoop]: Abstraction has 809 states and 4001 transitions. [2021-07-13 20:19:08,605 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) [2021-07-13 20:19:08,605 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 4001 transitions. [2021-07-13 20:19:08,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:19:08,608 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:08,608 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:08,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-13 20:19:08,817 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:08,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:08,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1253616623, now seen corresponding path program 13 times [2021-07-13 20:19:08,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:08,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278996051] [2021-07-13 20:19:08,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:08,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:08,922 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:08,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:08,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278996051] [2021-07-13 20:19:08,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278996051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:08,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993799076] [2021-07-13 20:19:08,922 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 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 [2021-07-13 20:19:08,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:08,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 20:19:08,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:09,110 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 [2021-07-13 20:19:09,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:09,116 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 [2021-07-13 20:19:09,117 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:09,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:09,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:19:09,149 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:91, output treesize:77 [2021-07-13 20:19:09,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:19:09,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993799076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:09,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:09,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2021-07-13 20:19:09,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501435874] [2021-07-13 20:19:09,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:19:09,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:09,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:19:09,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:19:09,223 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) [2021-07-13 20:19:09,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:09,375 INFO L93 Difference]: Finished difference Result 958 states and 4478 transitions. [2021-07-13 20:19:09,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:19:09,376 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 [2021-07-13 20:19:09,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:09,379 INFO L225 Difference]: With dead ends: 958 [2021-07-13 20:19:09,379 INFO L226 Difference]: Without dead ends: 943 [2021-07-13 20:19:09,379 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 246.3ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:19:09,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-07-13 20:19:09,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 817. [2021-07-13 20:19:09,394 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) [2021-07-13 20:19:09,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 4017 transitions. [2021-07-13 20:19:09,397 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 4017 transitions. Word has length 22 [2021-07-13 20:19:09,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:09,397 INFO L482 AbstractCegarLoop]: Abstraction has 817 states and 4017 transitions. [2021-07-13 20:19:09,397 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) [2021-07-13 20:19:09,397 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 4017 transitions. [2021-07-13 20:19:09,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:19:09,399 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:09,399 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:09,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:09,617 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:09,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:09,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1547176399, now seen corresponding path program 14 times [2021-07-13 20:19:09,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:09,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061539132] [2021-07-13 20:19:09,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:09,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:09,742 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:09,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:09,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061539132] [2021-07-13 20:19:09,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061539132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:09,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264541025] [2021-07-13 20:19:09,742 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 [2021-07-13 20:19:09,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:19:09,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:09,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:19:09,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:09,940 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:09,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264541025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:09,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:09,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 20:19:09,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963624293] [2021-07-13 20:19:09,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:19:09,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:09,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:19:09,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:19:09,942 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) [2021-07-13 20:19:10,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:10,198 INFO L93 Difference]: Finished difference Result 1066 states and 4874 transitions. [2021-07-13 20:19:10,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:19:10,198 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 [2021-07-13 20:19:10,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:10,201 INFO L225 Difference]: With dead ends: 1066 [2021-07-13 20:19:10,201 INFO L226 Difference]: Without dead ends: 1039 [2021-07-13 20:19:10,202 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 321.2ms TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:19:10,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2021-07-13 20:19:10,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 837. [2021-07-13 20:19:10,217 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) [2021-07-13 20:19:10,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 4119 transitions. [2021-07-13 20:19:10,220 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 4119 transitions. Word has length 22 [2021-07-13 20:19:10,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:10,220 INFO L482 AbstractCegarLoop]: Abstraction has 837 states and 4119 transitions. [2021-07-13 20:19:10,220 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) [2021-07-13 20:19:10,220 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 4119 transitions. [2021-07-13 20:19:10,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:19:10,223 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:10,223 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:10,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-07-13 20:19:10,437 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:10,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:10,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1104277259, now seen corresponding path program 15 times [2021-07-13 20:19:10,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:10,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317000535] [2021-07-13 20:19:10,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:10,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:10,528 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:10,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:10,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317000535] [2021-07-13 20:19:10,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317000535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:10,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560209676] [2021-07-13 20:19:10,528 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 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 [2021-07-13 20:19:10,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:19:10,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:10,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:19:10,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:10,796 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:10,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560209676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:10,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:10,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 20:19:10,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524006293] [2021-07-13 20:19:10,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:19:10,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:10,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:19:10,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:19:10,797 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) [2021-07-13 20:19:10,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:10,961 INFO L93 Difference]: Finished difference Result 896 states and 4308 transitions. [2021-07-13 20:19:10,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:19:10,961 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 [2021-07-13 20:19:10,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:10,964 INFO L225 Difference]: With dead ends: 896 [2021-07-13 20:19:10,964 INFO L226 Difference]: Without dead ends: 891 [2021-07-13 20:19:10,965 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 273.4ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:19:10,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-07-13 20:19:10,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 842. [2021-07-13 20:19:10,979 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) [2021-07-13 20:19:10,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 4134 transitions. [2021-07-13 20:19:10,983 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 4134 transitions. Word has length 22 [2021-07-13 20:19:10,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:10,983 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 4134 transitions. [2021-07-13 20:19:10,983 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) [2021-07-13 20:19:10,983 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 4134 transitions. [2021-07-13 20:19:10,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:19:10,985 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:10,985 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:11,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:11,201 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:11,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:11,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1885658193, now seen corresponding path program 2 times [2021-07-13 20:19:11,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:11,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558936666] [2021-07-13 20:19:11,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:11,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:11,311 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:11,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:11,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558936666] [2021-07-13 20:19:11,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558936666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:11,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345445568] [2021-07-13 20:19:11,312 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 [2021-07-13 20:19:11,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:19:11,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:11,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 20:19:11,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:11,718 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 [2021-07-13 20:19:11,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:11,764 INFO L628 ElimStorePlain]: treesize reduction 7, result has 90.1 percent of original size [2021-07-13 20:19:11,767 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 [2021-07-13 20:19:11,768 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:11,787 INFO L628 ElimStorePlain]: treesize reduction 33, result has 42.1 percent of original size [2021-07-13 20:19:11,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:11,788 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:78, output treesize:24 [2021-07-13 20:19:11,822 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:11,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345445568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:11,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:11,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 20:19:11,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564859222] [2021-07-13 20:19:11,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:19:11,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:11,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:19:11,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:19:11,823 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) [2021-07-13 20:19:12,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:12,146 INFO L93 Difference]: Finished difference Result 947 states and 4449 transitions. [2021-07-13 20:19:12,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:19:12,147 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 [2021-07-13 20:19:12,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:12,150 INFO L225 Difference]: With dead ends: 947 [2021-07-13 20:19:12,150 INFO L226 Difference]: Without dead ends: 930 [2021-07-13 20:19:12,150 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 567.4ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:19:12,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-07-13 20:19:12,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 847. [2021-07-13 20:19:12,162 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) [2021-07-13 20:19:12,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 4158 transitions. [2021-07-13 20:19:12,165 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 4158 transitions. Word has length 22 [2021-07-13 20:19:12,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:12,165 INFO L482 AbstractCegarLoop]: Abstraction has 847 states and 4158 transitions. [2021-07-13 20:19:12,165 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) [2021-07-13 20:19:12,165 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 4158 transitions. [2021-07-13 20:19:12,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:19:12,167 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:12,167 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:12,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:12,381 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:12,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:12,381 INFO L82 PathProgramCache]: Analyzing trace with hash -671870473, now seen corresponding path program 3 times [2021-07-13 20:19:12,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:12,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725608577] [2021-07-13 20:19:12,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:12,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:12,431 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:19:12,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:12,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725608577] [2021-07-13 20:19:12,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725608577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:12,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211641817] [2021-07-13 20:19:12,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:19:12,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:19:12,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:12,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 20:19:12,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:12,561 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 [2021-07-13 20:19:12,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:12,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:12,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:12,566 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:10 [2021-07-13 20:19:12,589 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:19:12,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211641817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:12,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:12,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 20:19:12,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478934070] [2021-07-13 20:19:12,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:19:12,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:12,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:19:12,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:19:12,590 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) [2021-07-13 20:19:12,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:12,793 INFO L93 Difference]: Finished difference Result 1380 states and 6250 transitions. [2021-07-13 20:19:12,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:19:12,793 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 [2021-07-13 20:19:12,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:12,797 INFO L225 Difference]: With dead ends: 1380 [2021-07-13 20:19:12,797 INFO L226 Difference]: Without dead ends: 1371 [2021-07-13 20:19:12,798 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 181.4ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:19:12,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2021-07-13 20:19:12,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 902. [2021-07-13 20:19:12,814 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) [2021-07-13 20:19:12,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 4495 transitions. [2021-07-13 20:19:12,818 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 4495 transitions. Word has length 22 [2021-07-13 20:19:12,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:12,818 INFO L482 AbstractCegarLoop]: Abstraction has 902 states and 4495 transitions. [2021-07-13 20:19:12,818 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) [2021-07-13 20:19:12,818 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 4495 transitions. [2021-07-13 20:19:12,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:19:12,820 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:12,820 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:13,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-07-13 20:19:13,033 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:13,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:13,033 INFO L82 PathProgramCache]: Analyzing trace with hash 965997621, now seen corresponding path program 4 times [2021-07-13 20:19:13,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:13,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267146699] [2021-07-13 20:19:13,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:13,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:13,113 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:13,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:13,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267146699] [2021-07-13 20:19:13,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267146699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:13,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373839002] [2021-07-13 20:19:13,114 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 [2021-07-13 20:19:13,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:19:13,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:13,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 20:19:13,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:13,525 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:13,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373839002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:13,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:13,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 20:19:13,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314861119] [2021-07-13 20:19:13,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:19:13,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:13,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:19:13,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:19:13,526 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) [2021-07-13 20:19:13,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:13,812 INFO L93 Difference]: Finished difference Result 929 states and 4570 transitions. [2021-07-13 20:19:13,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:19:13,812 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 [2021-07-13 20:19:13,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:13,815 INFO L225 Difference]: With dead ends: 929 [2021-07-13 20:19:13,815 INFO L226 Difference]: Without dead ends: 927 [2021-07-13 20:19:13,815 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 527.5ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:19:13,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-07-13 20:19:13,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 909. [2021-07-13 20:19:13,828 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) [2021-07-13 20:19:13,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 4516 transitions. [2021-07-13 20:19:13,831 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 4516 transitions. Word has length 22 [2021-07-13 20:19:13,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:13,831 INFO L482 AbstractCegarLoop]: Abstraction has 909 states and 4516 transitions. [2021-07-13 20:19:13,831 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) [2021-07-13 20:19:13,831 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 4516 transitions. [2021-07-13 20:19:13,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:19:13,833 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:13,833 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:14,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:14,046 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:14,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:14,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1818617425, now seen corresponding path program 5 times [2021-07-13 20:19:14,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:14,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979877229] [2021-07-13 20:19:14,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:14,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:14,209 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:14,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:14,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979877229] [2021-07-13 20:19:14,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979877229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:14,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912825766] [2021-07-13 20:19:14,209 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 [2021-07-13 20:19:14,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:19:14,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:14,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 20:19:14,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:14,599 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:14,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912825766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:14,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:14,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-07-13 20:19:14,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276570522] [2021-07-13 20:19:14,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:19:14,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:14,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:19:14,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:19:14,601 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) [2021-07-13 20:19:14,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:14,958 INFO L93 Difference]: Finished difference Result 936 states and 4581 transitions. [2021-07-13 20:19:14,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:19:14,958 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 [2021-07-13 20:19:14,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:14,961 INFO L225 Difference]: With dead ends: 936 [2021-07-13 20:19:14,961 INFO L226 Difference]: Without dead ends: 934 [2021-07-13 20:19:14,961 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 657.1ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:19:14,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2021-07-13 20:19:14,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 907. [2021-07-13 20:19:14,973 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) [2021-07-13 20:19:14,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 4503 transitions. [2021-07-13 20:19:14,976 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 4503 transitions. Word has length 22 [2021-07-13 20:19:14,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:14,976 INFO L482 AbstractCegarLoop]: Abstraction has 907 states and 4503 transitions. [2021-07-13 20:19:14,976 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) [2021-07-13 20:19:14,976 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 4503 transitions. [2021-07-13 20:19:14,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:19:14,978 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:14,978 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:15,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-07-13 20:19:15,183 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:15,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:15,184 INFO L82 PathProgramCache]: Analyzing trace with hash 541686385, now seen corresponding path program 6 times [2021-07-13 20:19:15,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:15,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158603700] [2021-07-13 20:19:15,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:15,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:15,266 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:15,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:15,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158603700] [2021-07-13 20:19:15,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158603700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:15,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947468431] [2021-07-13 20:19:15,266 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 [2021-07-13 20:19:15,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:19:15,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:15,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:19:15,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:15,669 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:15,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947468431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:15,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:15,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 20:19:15,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598158250] [2021-07-13 20:19:15,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:19:15,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:15,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:19:15,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:19:15,670 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) [2021-07-13 20:19:15,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:15,928 INFO L93 Difference]: Finished difference Result 929 states and 4558 transitions. [2021-07-13 20:19:15,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:19:15,929 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 [2021-07-13 20:19:15,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:15,931 INFO L225 Difference]: With dead ends: 929 [2021-07-13 20:19:15,931 INFO L226 Difference]: Without dead ends: 928 [2021-07-13 20:19:15,931 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 493.9ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:19:15,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2021-07-13 20:19:15,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 908. [2021-07-13 20:19:15,945 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) [2021-07-13 20:19:15,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 4504 transitions. [2021-07-13 20:19:15,948 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 4504 transitions. Word has length 22 [2021-07-13 20:19:15,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:15,948 INFO L482 AbstractCegarLoop]: Abstraction has 908 states and 4504 transitions. [2021-07-13 20:19:15,948 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) [2021-07-13 20:19:15,948 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 4504 transitions. [2021-07-13 20:19:15,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:19:15,950 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:15,950 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:16,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:16,165 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:16,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:16,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1519096036, now seen corresponding path program 7 times [2021-07-13 20:19:16,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:16,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34761252] [2021-07-13 20:19:16,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:16,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:16,271 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:16,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:16,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34761252] [2021-07-13 20:19:16,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34761252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:16,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238414099] [2021-07-13 20:19:16,271 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 [2021-07-13 20:19:16,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:16,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 20:19:16,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:16,637 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:16,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238414099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:16,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:16,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-07-13 20:19:16,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818438716] [2021-07-13 20:19:16,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:19:16,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:16,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:19:16,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:19:16,639 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) [2021-07-13 20:19:16,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:16,850 INFO L93 Difference]: Finished difference Result 952 states and 4606 transitions. [2021-07-13 20:19:16,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:19:16,851 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 [2021-07-13 20:19:16,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:16,853 INFO L225 Difference]: With dead ends: 952 [2021-07-13 20:19:16,853 INFO L226 Difference]: Without dead ends: 950 [2021-07-13 20:19:16,853 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 385.4ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:19:16,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2021-07-13 20:19:16,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 906. [2021-07-13 20:19:16,866 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) [2021-07-13 20:19:16,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 4473 transitions. [2021-07-13 20:19:16,869 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 4473 transitions. Word has length 23 [2021-07-13 20:19:16,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:16,869 INFO L482 AbstractCegarLoop]: Abstraction has 906 states and 4473 transitions. [2021-07-13 20:19:16,869 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) [2021-07-13 20:19:16,870 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 4473 transitions. [2021-07-13 20:19:16,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:19:16,872 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:16,872 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:17,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-07-13 20:19:17,075 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:17,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:17,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1855571384, now seen corresponding path program 16 times [2021-07-13 20:19:17,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:17,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182947992] [2021-07-13 20:19:17,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:17,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:17,228 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:17,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:17,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182947992] [2021-07-13 20:19:17,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182947992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:17,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461132450] [2021-07-13 20:19:17,228 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 [2021-07-13 20:19:17,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:19:17,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:17,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:19:17,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:17,468 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 [2021-07-13 20:19:17,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:17,473 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 [2021-07-13 20:19:17,474 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:17,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:17,506 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. [2021-07-13 20:19:17,506 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-07-13 20:19:17,599 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:17,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461132450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:17,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:17,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 20:19:17,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38186342] [2021-07-13 20:19:17,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:19:17,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:17,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:19:17,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:19:17,600 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) [2021-07-13 20:19:17,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:17,707 INFO L93 Difference]: Finished difference Result 1075 states and 4663 transitions. [2021-07-13 20:19:17,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:19:17,707 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 [2021-07-13 20:19:17,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:17,710 INFO L225 Difference]: With dead ends: 1075 [2021-07-13 20:19:17,710 INFO L226 Difference]: Without dead ends: 1071 [2021-07-13 20:19:17,711 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 283.6ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:19:17,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2021-07-13 20:19:17,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 772. [2021-07-13 20:19:17,727 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) [2021-07-13 20:19:17,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 3664 transitions. [2021-07-13 20:19:17,741 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 3664 transitions. Word has length 23 [2021-07-13 20:19:17,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:17,741 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 3664 transitions. [2021-07-13 20:19:17,741 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) [2021-07-13 20:19:17,742 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 3664 transitions. [2021-07-13 20:19:17,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:19:17,744 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:17,744 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:17,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:17,953 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:17,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:17,953 INFO L82 PathProgramCache]: Analyzing trace with hash -2015886678, now seen corresponding path program 17 times [2021-07-13 20:19:17,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:17,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685866217] [2021-07-13 20:19:17,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:17,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:18,059 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:18,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:18,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685866217] [2021-07-13 20:19:18,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685866217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:18,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396064195] [2021-07-13 20:19:18,059 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 [2021-07-13 20:19:18,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:19:18,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:18,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:19:18,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:18,361 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:18,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396064195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:18,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:18,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-07-13 20:19:18,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066652548] [2021-07-13 20:19:18,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:19:18,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:18,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:19:18,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:19:18,362 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) [2021-07-13 20:19:18,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:18,467 INFO L93 Difference]: Finished difference Result 833 states and 3832 transitions. [2021-07-13 20:19:18,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:19:18,485 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 [2021-07-13 20:19:18,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:18,488 INFO L225 Difference]: With dead ends: 833 [2021-07-13 20:19:18,488 INFO L226 Difference]: Without dead ends: 827 [2021-07-13 20:19:18,488 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 290.5ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:19:18,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-07-13 20:19:18,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 774. [2021-07-13 20:19:18,501 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) [2021-07-13 20:19:18,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 3668 transitions. [2021-07-13 20:19:18,503 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 3668 transitions. Word has length 23 [2021-07-13 20:19:18,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:18,503 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 3668 transitions. [2021-07-13 20:19:18,503 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) [2021-07-13 20:19:18,503 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 3668 transitions. [2021-07-13 20:19:18,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:19:18,505 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:18,505 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:18,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:18,722 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:18,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:18,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1854769382, now seen corresponding path program 18 times [2021-07-13 20:19:18,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:18,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3899148] [2021-07-13 20:19:18,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:18,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:18,824 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:18,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:18,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3899148] [2021-07-13 20:19:18,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3899148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:18,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135704368] [2021-07-13 20:19:18,824 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 [2021-07-13 20:19:18,865 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:19:18,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:18,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:19:18,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:19,196 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:19,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135704368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:19,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:19,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-07-13 20:19:19,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420946197] [2021-07-13 20:19:19,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:19:19,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:19,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:19:19,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:19:19,197 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) [2021-07-13 20:19:19,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:19,339 INFO L93 Difference]: Finished difference Result 830 states and 3817 transitions. [2021-07-13 20:19:19,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:19:19,340 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 [2021-07-13 20:19:19,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:19,342 INFO L225 Difference]: With dead ends: 830 [2021-07-13 20:19:19,342 INFO L226 Difference]: Without dead ends: 828 [2021-07-13 20:19:19,342 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 341.0ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:19:19,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-07-13 20:19:19,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 776. [2021-07-13 20:19:19,353 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) [2021-07-13 20:19:19,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 3671 transitions. [2021-07-13 20:19:19,355 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 3671 transitions. Word has length 23 [2021-07-13 20:19:19,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:19,356 INFO L482 AbstractCegarLoop]: Abstraction has 776 states and 3671 transitions. [2021-07-13 20:19:19,356 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) [2021-07-13 20:19:19,356 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 3671 transitions. [2021-07-13 20:19:19,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:19:19,357 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:19,357 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:19,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:19,558 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:19,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:19,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1208762112, now seen corresponding path program 19 times [2021-07-13 20:19:19,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:19,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507571053] [2021-07-13 20:19:19,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:19,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:19,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:19:19,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:19,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507571053] [2021-07-13 20:19:19,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507571053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:19,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686741510] [2021-07-13 20:19:19,685 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 [2021-07-13 20:19:19,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:19,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 20:19:19,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:19,989 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:19:19,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686741510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:19,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:19,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 20:19:19,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620127145] [2021-07-13 20:19:19,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:19:19,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:19,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:19:19,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:19:19,990 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) [2021-07-13 20:19:20,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:20,155 INFO L93 Difference]: Finished difference Result 941 states and 4147 transitions. [2021-07-13 20:19:20,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:19:20,156 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 [2021-07-13 20:19:20,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:20,158 INFO L225 Difference]: With dead ends: 941 [2021-07-13 20:19:20,158 INFO L226 Difference]: Without dead ends: 923 [2021-07-13 20:19:20,158 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 383.3ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:19:20,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2021-07-13 20:19:20,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 773. [2021-07-13 20:19:20,168 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) [2021-07-13 20:19:20,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 3628 transitions. [2021-07-13 20:19:20,170 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 3628 transitions. Word has length 23 [2021-07-13 20:19:20,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:20,171 INFO L482 AbstractCegarLoop]: Abstraction has 773 states and 3628 transitions. [2021-07-13 20:19:20,171 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) [2021-07-13 20:19:20,171 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 3628 transitions. [2021-07-13 20:19:20,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:19:20,172 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:20,172 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:20,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:20,373 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:20,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:20,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1009797930, now seen corresponding path program 20 times [2021-07-13 20:19:20,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:20,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487640719] [2021-07-13 20:19:20,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:20,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:20,472 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:20,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:20,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487640719] [2021-07-13 20:19:20,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487640719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:20,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584251482] [2021-07-13 20:19:20,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:19:20,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:19:20,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:20,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 20:19:20,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:20,880 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:20,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584251482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:20,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:20,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-07-13 20:19:20,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204357625] [2021-07-13 20:19:20,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:19:20,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:20,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:19:20,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:19:20,881 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) [2021-07-13 20:19:21,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:21,066 INFO L93 Difference]: Finished difference Result 828 states and 3794 transitions. [2021-07-13 20:19:21,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:19:21,066 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 [2021-07-13 20:19:21,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:21,068 INFO L225 Difference]: With dead ends: 828 [2021-07-13 20:19:21,068 INFO L226 Difference]: Without dead ends: 825 [2021-07-13 20:19:21,068 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 436.9ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:19:21,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-07-13 20:19:21,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 777. [2021-07-13 20:19:21,080 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) [2021-07-13 20:19:21,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 3643 transitions. [2021-07-13 20:19:21,083 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 3643 transitions. Word has length 23 [2021-07-13 20:19:21,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:21,083 INFO L482 AbstractCegarLoop]: Abstraction has 777 states and 3643 transitions. [2021-07-13 20:19:21,083 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) [2021-07-13 20:19:21,083 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 3643 transitions. [2021-07-13 20:19:21,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:19:21,085 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:21,085 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:21,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-07-13 20:19:21,302 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:21,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:21,303 INFO L82 PathProgramCache]: Analyzing trace with hash -2053733564, now seen corresponding path program 21 times [2021-07-13 20:19:21,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:21,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950060858] [2021-07-13 20:19:21,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:21,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:21,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:19:21,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:21,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950060858] [2021-07-13 20:19:21,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950060858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:21,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578838774] [2021-07-13 20:19:21,377 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 [2021-07-13 20:19:21,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:19:21,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:21,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:19:21,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:21,526 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 [2021-07-13 20:19:21,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:21,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:21,535 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 [2021-07-13 20:19:21,536 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:21,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:21,541 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. [2021-07-13 20:19:21,541 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:28, output treesize:14 [2021-07-13 20:19:21,568 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:19:21,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578838774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:21,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:21,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-07-13 20:19:21,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800559069] [2021-07-13 20:19:21,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:19:21,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:21,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:19:21,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:19:21,569 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) [2021-07-13 20:19:21,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:21,925 INFO L93 Difference]: Finished difference Result 867 states and 3843 transitions. [2021-07-13 20:19:21,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:19:21,926 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 [2021-07-13 20:19:21,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:21,927 INFO L225 Difference]: With dead ends: 867 [2021-07-13 20:19:21,927 INFO L226 Difference]: Without dead ends: 861 [2021-07-13 20:19:21,928 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 209.1ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:19:21,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2021-07-13 20:19:21,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 763. [2021-07-13 20:19:21,938 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) [2021-07-13 20:19:21,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 3551 transitions. [2021-07-13 20:19:21,940 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 3551 transitions. Word has length 23 [2021-07-13 20:19:21,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:21,940 INFO L482 AbstractCegarLoop]: Abstraction has 763 states and 3551 transitions. [2021-07-13 20:19:21,940 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) [2021-07-13 20:19:21,940 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 3551 transitions. [2021-07-13 20:19:21,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:19:21,942 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:21,942 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:22,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:22,143 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:22,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:22,143 INFO L82 PathProgramCache]: Analyzing trace with hash -50023488, now seen corresponding path program 7 times [2021-07-13 20:19:22,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:22,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182951034] [2021-07-13 20:19:22,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:22,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:22,214 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:19:22,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:22,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182951034] [2021-07-13 20:19:22,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182951034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:22,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889140767] [2021-07-13 20:19:22,214 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) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:22,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:22,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:19:22,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:22,333 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 [2021-07-13 20:19:22,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:22,336 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 [2021-07-13 20:19:22,337 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:22,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:22,350 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. [2021-07-13 20:19:22,350 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:62, output treesize:48 [2021-07-13 20:19:22,430 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:19:22,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889140767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:22,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:22,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-13 20:19:22,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466123191] [2021-07-13 20:19:22,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:19:22,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:22,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:19:22,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:19:22,432 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) [2021-07-13 20:19:22,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:22,664 INFO L93 Difference]: Finished difference Result 2342 states and 10200 transitions. [2021-07-13 20:19:22,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:19:22,664 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 [2021-07-13 20:19:22,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:22,671 INFO L225 Difference]: With dead ends: 2342 [2021-07-13 20:19:22,671 INFO L226 Difference]: Without dead ends: 2230 [2021-07-13 20:19:22,672 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 281.2ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:19:22,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2230 states. [2021-07-13 20:19:22,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2230 to 1262. [2021-07-13 20:19:22,701 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) [2021-07-13 20:19:22,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 6210 transitions. [2021-07-13 20:19:22,705 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 6210 transitions. Word has length 23 [2021-07-13 20:19:22,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:22,705 INFO L482 AbstractCegarLoop]: Abstraction has 1262 states and 6210 transitions. [2021-07-13 20:19:22,705 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) [2021-07-13 20:19:22,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 6210 transitions. [2021-07-13 20:19:22,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:19:22,708 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:22,708 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:22,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:22,925 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:22,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:22,925 INFO L82 PathProgramCache]: Analyzing trace with hash -2123404862, now seen corresponding path program 8 times [2021-07-13 20:19:22,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:22,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579610257] [2021-07-13 20:19:22,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:22,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:23,044 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:23,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:23,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579610257] [2021-07-13 20:19:23,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579610257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:23,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104858042] [2021-07-13 20:19:23,044 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 [2021-07-13 20:19:23,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:19:23,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:23,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:19:23,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:23,462 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 [2021-07-13 20:19:23,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:23,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:23,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:23,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-07-13 20:19:23,506 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:23,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104858042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:23,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:23,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 20:19:23,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100570294] [2021-07-13 20:19:23,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:19:23,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:23,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:19:23,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:19:23,507 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) [2021-07-13 20:19:23,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:23,958 INFO L93 Difference]: Finished difference Result 1627 states and 7436 transitions. [2021-07-13 20:19:23,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:19:23,958 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 [2021-07-13 20:19:23,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:23,962 INFO L225 Difference]: With dead ends: 1627 [2021-07-13 20:19:23,962 INFO L226 Difference]: Without dead ends: 1589 [2021-07-13 20:19:23,962 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 674.1ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:19:23,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2021-07-13 20:19:23,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1292. [2021-07-13 20:19:23,983 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) [2021-07-13 20:19:23,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 6350 transitions. [2021-07-13 20:19:23,987 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 6350 transitions. Word has length 23 [2021-07-13 20:19:23,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:23,988 INFO L482 AbstractCegarLoop]: Abstraction has 1292 states and 6350 transitions. [2021-07-13 20:19:23,988 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) [2021-07-13 20:19:23,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 6350 transitions. [2021-07-13 20:19:23,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:19:23,991 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:23,991 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:24,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-07-13 20:19:24,205 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:24,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:24,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1658839292, now seen corresponding path program 9 times [2021-07-13 20:19:24,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:24,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635569306] [2021-07-13 20:19:24,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:24,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:24,310 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:24,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:24,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635569306] [2021-07-13 20:19:24,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635569306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:24,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263472081] [2021-07-13 20:19:24,311 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 [2021-07-13 20:19:24,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:19:24,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:24,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:19:24,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:24,542 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 [2021-07-13 20:19:24,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:24,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:24,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:24,551 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-07-13 20:19:24,582 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:24,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263472081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:24,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:24,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 20:19:24,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009678966] [2021-07-13 20:19:24,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:19:24,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:24,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:19:24,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:19:24,583 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) [2021-07-13 20:19:24,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:24,889 INFO L93 Difference]: Finished difference Result 2364 states and 10664 transitions. [2021-07-13 20:19:24,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:19:24,890 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 [2021-07-13 20:19:24,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:24,895 INFO L225 Difference]: With dead ends: 2364 [2021-07-13 20:19:24,895 INFO L226 Difference]: Without dead ends: 2284 [2021-07-13 20:19:24,895 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 375.1ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:19:24,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2284 states. [2021-07-13 20:19:24,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2284 to 1465. [2021-07-13 20:19:24,918 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) [2021-07-13 20:19:24,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 7385 transitions. [2021-07-13 20:19:24,923 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 7385 transitions. Word has length 23 [2021-07-13 20:19:24,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:24,923 INFO L482 AbstractCegarLoop]: Abstraction has 1465 states and 7385 transitions. [2021-07-13 20:19:24,923 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) [2021-07-13 20:19:24,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 7385 transitions. [2021-07-13 20:19:24,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:19:24,926 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:24,926 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:25,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-07-13 20:19:25,141 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:25,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:25,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1728663294, now seen corresponding path program 10 times [2021-07-13 20:19:25,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:25,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334272074] [2021-07-13 20:19:25,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:25,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:25,225 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:25,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:25,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334272074] [2021-07-13 20:19:25,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334272074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:25,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992150918] [2021-07-13 20:19:25,226 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 [2021-07-13 20:19:25,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:19:25,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:25,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 20:19:25,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:25,399 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 [2021-07-13 20:19:25,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:25,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:25,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:25,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2021-07-13 20:19:25,432 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:19:25,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992150918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:25,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:25,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-07-13 20:19:25,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771767105] [2021-07-13 20:19:25,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:19:25,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:25,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:19:25,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:19:25,434 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) [2021-07-13 20:19:25,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:25,679 INFO L93 Difference]: Finished difference Result 2052 states and 9700 transitions. [2021-07-13 20:19:25,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:19:25,680 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 [2021-07-13 20:19:25,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:25,685 INFO L225 Difference]: With dead ends: 2052 [2021-07-13 20:19:25,685 INFO L226 Difference]: Without dead ends: 2019 [2021-07-13 20:19:25,685 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 270.1ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:19:25,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2019 states. [2021-07-13 20:19:25,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2019 to 1508. [2021-07-13 20:19:25,708 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) [2021-07-13 20:19:25,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1508 states to 1508 states and 7654 transitions. [2021-07-13 20:19:25,713 INFO L78 Accepts]: Start accepts. Automaton has 1508 states and 7654 transitions. Word has length 23 [2021-07-13 20:19:25,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:25,713 INFO L482 AbstractCegarLoop]: Abstraction has 1508 states and 7654 transitions. [2021-07-13 20:19:25,713 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) [2021-07-13 20:19:25,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1508 states and 7654 transitions. [2021-07-13 20:19:25,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:19:25,716 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:25,716 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:25,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-07-13 20:19:25,929 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:25,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:25,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1215940152, now seen corresponding path program 11 times [2021-07-13 20:19:25,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:25,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110698913] [2021-07-13 20:19:25,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:25,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:25,983 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:19:25,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:25,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110698913] [2021-07-13 20:19:25,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110698913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:25,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646163170] [2021-07-13 20:19:25,983 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 [2021-07-13 20:19:26,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:19:26,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:26,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:19:26,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:26,218 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:19:26,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646163170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:26,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:26,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-13 20:19:26,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358389220] [2021-07-13 20:19:26,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:19:26,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:26,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:19:26,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:19:26,219 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) [2021-07-13 20:19:26,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:26,402 INFO L93 Difference]: Finished difference Result 2203 states and 10357 transitions. [2021-07-13 20:19:26,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:19:26,402 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 [2021-07-13 20:19:26,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:26,408 INFO L225 Difference]: With dead ends: 2203 [2021-07-13 20:19:26,408 INFO L226 Difference]: Without dead ends: 2160 [2021-07-13 20:19:26,408 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 219.3ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:19:26,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2160 states. [2021-07-13 20:19:26,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2160 to 1464. [2021-07-13 20:19:26,431 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) [2021-07-13 20:19:26,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 7471 transitions. [2021-07-13 20:19:26,436 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 7471 transitions. Word has length 23 [2021-07-13 20:19:26,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:26,436 INFO L482 AbstractCegarLoop]: Abstraction has 1464 states and 7471 transitions. [2021-07-13 20:19:26,436 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) [2021-07-13 20:19:26,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 7471 transitions. [2021-07-13 20:19:26,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:19:26,439 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:26,439 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:26,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:26,639 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:26,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:26,640 INFO L82 PathProgramCache]: Analyzing trace with hash 755994684, now seen corresponding path program 12 times [2021-07-13 20:19:26,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:26,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109578737] [2021-07-13 20:19:26,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:26,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:26,748 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:26,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:26,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109578737] [2021-07-13 20:19:26,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109578737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:26,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103206614] [2021-07-13 20:19:26,748 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 [2021-07-13 20:19:26,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:19:26,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:26,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:19:26,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:27,134 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:27,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103206614] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:27,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:27,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 20:19:27,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700560469] [2021-07-13 20:19:27,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:19:27,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:27,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:19:27,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:19:27,136 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) [2021-07-13 20:19:27,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:27,398 INFO L93 Difference]: Finished difference Result 1548 states and 7764 transitions. [2021-07-13 20:19:27,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:19:27,398 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 [2021-07-13 20:19:27,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:27,402 INFO L225 Difference]: With dead ends: 1548 [2021-07-13 20:19:27,402 INFO L226 Difference]: Without dead ends: 1536 [2021-07-13 20:19:27,402 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 499.7ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:19:27,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2021-07-13 20:19:27,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 1474. [2021-07-13 20:19:27,425 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) [2021-07-13 20:19:27,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 7519 transitions. [2021-07-13 20:19:27,430 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 7519 transitions. Word has length 23 [2021-07-13 20:19:27,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:27,430 INFO L482 AbstractCegarLoop]: Abstraction has 1474 states and 7519 transitions. [2021-07-13 20:19:27,430 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) [2021-07-13 20:19:27,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 7519 transitions. [2021-07-13 20:19:27,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:19:27,433 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:27,433 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:27,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-07-13 20:19:27,634 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:27,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:27,634 INFO L82 PathProgramCache]: Analyzing trace with hash 75343520, now seen corresponding path program 13 times [2021-07-13 20:19:27,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:27,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300611575] [2021-07-13 20:19:27,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:27,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:27,771 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:27,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:27,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300611575] [2021-07-13 20:19:27,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300611575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:27,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344574358] [2021-07-13 20:19:27,771 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 [2021-07-13 20:19:27,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:27,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:19:27,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:28,158 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:28,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344574358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:28,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:28,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 20:19:28,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948637749] [2021-07-13 20:19:28,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:19:28,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:28,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:19:28,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:19:28,159 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) [2021-07-13 20:19:28,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:28,437 INFO L93 Difference]: Finished difference Result 1546 states and 7729 transitions. [2021-07-13 20:19:28,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:19:28,437 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 [2021-07-13 20:19:28,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:28,441 INFO L225 Difference]: With dead ends: 1546 [2021-07-13 20:19:28,441 INFO L226 Difference]: Without dead ends: 1534 [2021-07-13 20:19:28,441 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 537.0ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:19:28,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1534 states. [2021-07-13 20:19:28,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1534 to 1473. [2021-07-13 20:19:28,459 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) [2021-07-13 20:19:28,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 7511 transitions. [2021-07-13 20:19:28,463 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 7511 transitions. Word has length 23 [2021-07-13 20:19:28,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:28,463 INFO L482 AbstractCegarLoop]: Abstraction has 1473 states and 7511 transitions. [2021-07-13 20:19:28,463 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) [2021-07-13 20:19:28,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 7511 transitions. [2021-07-13 20:19:28,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:19:28,466 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:28,466 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:28,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-07-13 20:19:28,667 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:28,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:28,667 INFO L82 PathProgramCache]: Analyzing trace with hash 927963324, now seen corresponding path program 14 times [2021-07-13 20:19:28,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:28,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135134782] [2021-07-13 20:19:28,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:28,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:28,798 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:28,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:28,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135134782] [2021-07-13 20:19:28,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135134782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:28,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499904982] [2021-07-13 20:19:28,799 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 [2021-07-13 20:19:28,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:19:28,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:28,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:19:28,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:29,053 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:29,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499904982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:29,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:29,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 20:19:29,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397745474] [2021-07-13 20:19:29,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:19:29,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:29,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:19:29,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:19:29,054 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) [2021-07-13 20:19:29,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:29,232 INFO L93 Difference]: Finished difference Result 1593 states and 7901 transitions. [2021-07-13 20:19:29,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:19:29,233 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 [2021-07-13 20:19:29,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:29,237 INFO L225 Difference]: With dead ends: 1593 [2021-07-13 20:19:29,237 INFO L226 Difference]: Without dead ends: 1586 [2021-07-13 20:19:29,237 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 332.1ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:19:29,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2021-07-13 20:19:29,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 1485. [2021-07-13 20:19:29,257 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) [2021-07-13 20:19:29,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 7558 transitions. [2021-07-13 20:19:29,261 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 7558 transitions. Word has length 23 [2021-07-13 20:19:29,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:29,261 INFO L482 AbstractCegarLoop]: Abstraction has 1485 states and 7558 transitions. [2021-07-13 20:19:29,261 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) [2021-07-13 20:19:29,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 7558 transitions. [2021-07-13 20:19:29,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:19:29,264 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:29,264 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:29,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:29,464 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:29,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:29,465 INFO L82 PathProgramCache]: Analyzing trace with hash -935773730, now seen corresponding path program 15 times [2021-07-13 20:19:29,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:29,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634940771] [2021-07-13 20:19:29,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:29,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:29,576 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:29,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:29,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634940771] [2021-07-13 20:19:29,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634940771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:29,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437701184] [2021-07-13 20:19:29,577 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 [2021-07-13 20:19:29,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:19:29,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:29,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:19:29,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:29,840 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:29,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437701184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:29,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:29,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 20:19:29,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219581234] [2021-07-13 20:19:29,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:19:29,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:29,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:19:29,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:19:29,841 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) [2021-07-13 20:19:29,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:29,989 INFO L93 Difference]: Finished difference Result 1522 states and 7682 transitions. [2021-07-13 20:19:29,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:19:29,989 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 [2021-07-13 20:19:29,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:29,992 INFO L225 Difference]: With dead ends: 1522 [2021-07-13 20:19:29,993 INFO L226 Difference]: Without dead ends: 1517 [2021-07-13 20:19:29,993 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 317.0ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:19:29,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2021-07-13 20:19:30,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 1487. [2021-07-13 20:19:30,024 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) [2021-07-13 20:19:30,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 7561 transitions. [2021-07-13 20:19:30,028 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 7561 transitions. Word has length 23 [2021-07-13 20:19:30,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:30,029 INFO L482 AbstractCegarLoop]: Abstraction has 1487 states and 7561 transitions. [2021-07-13 20:19:30,029 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) [2021-07-13 20:19:30,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 7561 transitions. [2021-07-13 20:19:30,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:19:30,031 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:30,032 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:30,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-07-13 20:19:30,232 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:30,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:30,233 INFO L82 PathProgramCache]: Analyzing trace with hash 503652088, now seen corresponding path program 16 times [2021-07-13 20:19:30,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:30,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931782535] [2021-07-13 20:19:30,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:30,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:30,348 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:30,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:30,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931782535] [2021-07-13 20:19:30,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931782535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:30,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20557356] [2021-07-13 20:19:30,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:19:30,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:19:30,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:30,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:19:30,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:30,707 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:30,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20557356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:30,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:30,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 20:19:30,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329620331] [2021-07-13 20:19:30,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:19:30,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:30,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:19:30,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:19:30,708 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) [2021-07-13 20:19:30,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:30,934 INFO L93 Difference]: Finished difference Result 1542 states and 7723 transitions. [2021-07-13 20:19:30,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:19:30,935 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 [2021-07-13 20:19:30,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:30,938 INFO L225 Difference]: With dead ends: 1542 [2021-07-13 20:19:30,938 INFO L226 Difference]: Without dead ends: 1535 [2021-07-13 20:19:30,939 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 466.0ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:19:30,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2021-07-13 20:19:30,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1487. [2021-07-13 20:19:30,956 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) [2021-07-13 20:19:30,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 7565 transitions. [2021-07-13 20:19:30,960 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 7565 transitions. Word has length 23 [2021-07-13 20:19:30,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:30,961 INFO L482 AbstractCegarLoop]: Abstraction has 1487 states and 7565 transitions. [2021-07-13 20:19:30,961 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) [2021-07-13 20:19:30,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 7565 transitions. [2021-07-13 20:19:30,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:19:30,964 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:30,964 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:31,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-07-13 20:19:31,164 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:31,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:31,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1831271002, now seen corresponding path program 17 times [2021-07-13 20:19:31,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:31,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288631698] [2021-07-13 20:19:31,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:31,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:31,330 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:31,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:31,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288631698] [2021-07-13 20:19:31,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288631698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:31,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276209416] [2021-07-13 20:19:31,331 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 [2021-07-13 20:19:31,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:19:31,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:31,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:19:31,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:31,606 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 [2021-07-13 20:19:31,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:31,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:31,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:31,616 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-07-13 20:19:31,651 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:31,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276209416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:31,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:31,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 20:19:31,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166534464] [2021-07-13 20:19:31,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:19:31,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:31,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:19:31,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:19:31,652 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) [2021-07-13 20:19:31,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:31,963 INFO L93 Difference]: Finished difference Result 2082 states and 9859 transitions. [2021-07-13 20:19:31,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:19:31,964 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 [2021-07-13 20:19:31,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:31,969 INFO L225 Difference]: With dead ends: 2082 [2021-07-13 20:19:31,969 INFO L226 Difference]: Without dead ends: 2041 [2021-07-13 20:19:31,969 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 403.5ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:19:31,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2041 states. [2021-07-13 20:19:31,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2041 to 1495. [2021-07-13 20:19:31,992 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) [2021-07-13 20:19:31,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 7699 transitions. [2021-07-13 20:19:31,997 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 7699 transitions. Word has length 23 [2021-07-13 20:19:31,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:31,997 INFO L482 AbstractCegarLoop]: Abstraction has 1495 states and 7699 transitions. [2021-07-13 20:19:31,997 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) [2021-07-13 20:19:31,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 7699 transitions. [2021-07-13 20:19:32,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:19:32,000 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:32,000 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:32,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-07-13 20:19:32,213 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:32,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:32,213 INFO L82 PathProgramCache]: Analyzing trace with hash 487248256, now seen corresponding path program 18 times [2021-07-13 20:19:32,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:32,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231083975] [2021-07-13 20:19:32,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:32,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:32,358 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:32,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:32,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231083975] [2021-07-13 20:19:32,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231083975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:32,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443854341] [2021-07-13 20:19:32,358 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 [2021-07-13 20:19:32,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:19:32,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:32,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:19:32,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:32,790 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:32,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443854341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:32,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:32,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 20:19:32,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709804829] [2021-07-13 20:19:32,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:19:32,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:32,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:19:32,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:19:32,791 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) [2021-07-13 20:19:33,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:33,159 INFO L93 Difference]: Finished difference Result 1873 states and 8862 transitions. [2021-07-13 20:19:33,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:19:33,159 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 [2021-07-13 20:19:33,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:33,164 INFO L225 Difference]: With dead ends: 1873 [2021-07-13 20:19:33,164 INFO L226 Difference]: Without dead ends: 1829 [2021-07-13 20:19:33,164 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 659.4ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:19:33,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1829 states. [2021-07-13 20:19:33,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1829 to 1491. [2021-07-13 20:19:33,186 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) [2021-07-13 20:19:33,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1491 states to 1491 states and 7545 transitions. [2021-07-13 20:19:33,190 INFO L78 Accepts]: Start accepts. Automaton has 1491 states and 7545 transitions. Word has length 23 [2021-07-13 20:19:33,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:33,190 INFO L482 AbstractCegarLoop]: Abstraction has 1491 states and 7545 transitions. [2021-07-13 20:19:33,190 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) [2021-07-13 20:19:33,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1491 states and 7545 transitions. [2021-07-13 20:19:33,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:19:33,193 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:33,193 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:33,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-07-13 20:19:33,394 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:33,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:33,394 INFO L82 PathProgramCache]: Analyzing trace with hash -193402908, now seen corresponding path program 19 times [2021-07-13 20:19:33,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:33,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569218283] [2021-07-13 20:19:33,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:33,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:33,500 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:33,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:33,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569218283] [2021-07-13 20:19:33,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569218283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:33,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999895065] [2021-07-13 20:19:33,500 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 [2021-07-13 20:19:33,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:33,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:19:33,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:33,927 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:33,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999895065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:33,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:33,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 20:19:33,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119140393] [2021-07-13 20:19:33,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:19:33,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:33,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:19:33,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:19:33,928 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) [2021-07-13 20:19:34,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:34,140 INFO L93 Difference]: Finished difference Result 1562 states and 7790 transitions. [2021-07-13 20:19:34,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:19:34,141 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 [2021-07-13 20:19:34,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:34,144 INFO L225 Difference]: With dead ends: 1562 [2021-07-13 20:19:34,144 INFO L226 Difference]: Without dead ends: 1557 [2021-07-13 20:19:34,144 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 477.4ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:19:34,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1557 states. [2021-07-13 20:19:34,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1557 to 1498. [2021-07-13 20:19:34,196 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) [2021-07-13 20:19:34,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1498 states to 1498 states and 7568 transitions. [2021-07-13 20:19:34,200 INFO L78 Accepts]: Start accepts. Automaton has 1498 states and 7568 transitions. Word has length 23 [2021-07-13 20:19:34,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:34,200 INFO L482 AbstractCegarLoop]: Abstraction has 1498 states and 7568 transitions. [2021-07-13 20:19:34,200 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) [2021-07-13 20:19:34,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1498 states and 7568 transitions. [2021-07-13 20:19:34,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:19:34,203 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:34,203 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:34,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:34,417 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:34,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:34,417 INFO L82 PathProgramCache]: Analyzing trace with hash 659216896, now seen corresponding path program 20 times [2021-07-13 20:19:34,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:34,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580267806] [2021-07-13 20:19:34,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:34,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:34,534 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:34,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:34,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580267806] [2021-07-13 20:19:34,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580267806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:34,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065910834] [2021-07-13 20:19:34,534 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 [2021-07-13 20:19:34,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:19:34,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:34,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:19:34,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:34,840 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:34,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065910834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:34,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:34,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 20:19:34,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502852842] [2021-07-13 20:19:34,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:19:34,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:34,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:19:34,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:19:34,841 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) [2021-07-13 20:19:35,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:35,141 INFO L93 Difference]: Finished difference Result 1612 states and 7977 transitions. [2021-07-13 20:19:35,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:19:35,142 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 [2021-07-13 20:19:35,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:35,145 INFO L225 Difference]: With dead ends: 1612 [2021-07-13 20:19:35,145 INFO L226 Difference]: Without dead ends: 1607 [2021-07-13 20:19:35,145 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 518.0ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:19:35,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2021-07-13 20:19:35,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1494. [2021-07-13 20:19:35,164 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) [2021-07-13 20:19:35,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 7552 transitions. [2021-07-13 20:19:35,168 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 7552 transitions. Word has length 23 [2021-07-13 20:19:35,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:35,169 INFO L482 AbstractCegarLoop]: Abstraction has 1494 states and 7552 transitions. [2021-07-13 20:19:35,169 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) [2021-07-13 20:19:35,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 7552 transitions. [2021-07-13 20:19:35,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:19:35,172 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:35,172 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:35,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-07-13 20:19:35,385 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:35,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:35,385 INFO L82 PathProgramCache]: Analyzing trace with hash -617714144, now seen corresponding path program 21 times [2021-07-13 20:19:35,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:35,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455661858] [2021-07-13 20:19:35,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:35,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:35,530 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:35,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:35,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455661858] [2021-07-13 20:19:35,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455661858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:35,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119832388] [2021-07-13 20:19:35,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:19:35,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:19:35,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:35,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:19:35,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:36,045 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:36,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119832388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:36,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:36,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 20:19:36,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397285769] [2021-07-13 20:19:36,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:19:36,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:36,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:19:36,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:19:36,046 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) [2021-07-13 20:19:36,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:36,288 INFO L93 Difference]: Finished difference Result 1565 states and 7788 transitions. [2021-07-13 20:19:36,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:19:36,289 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 [2021-07-13 20:19:36,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:36,293 INFO L225 Difference]: With dead ends: 1565 [2021-07-13 20:19:36,293 INFO L226 Difference]: Without dead ends: 1560 [2021-07-13 20:19:36,293 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 578.5ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:19:36,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2021-07-13 20:19:36,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1492. [2021-07-13 20:19:36,311 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) [2021-07-13 20:19:36,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1492 states to 1492 states and 7546 transitions. [2021-07-13 20:19:36,315 INFO L78 Accepts]: Start accepts. Automaton has 1492 states and 7546 transitions. Word has length 23 [2021-07-13 20:19:36,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:36,316 INFO L482 AbstractCegarLoop]: Abstraction has 1492 states and 7546 transitions. [2021-07-13 20:19:36,316 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) [2021-07-13 20:19:36,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1492 states and 7546 transitions. [2021-07-13 20:19:36,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:19:36,319 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:36,319 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:36,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:36,534 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:36,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:36,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1197073225, now seen corresponding path program 8 times [2021-07-13 20:19:36,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:36,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404971871] [2021-07-13 20:19:36,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:36,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:36,629 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:19:36,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:36,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404971871] [2021-07-13 20:19:36,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404971871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:36,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773132609] [2021-07-13 20:19:36,630 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 [2021-07-13 20:19:36,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:19:36,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:36,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:19:36,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:36,819 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 [2021-07-13 20:19:36,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:36,823 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 [2021-07-13 20:19:36,824 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:36,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:36,854 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 [2021-07-13 20:19:36,855 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:36,857 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 [2021-07-13 20:19:36,858 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:36,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:36,887 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. [2021-07-13 20:19:36,887 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:95, output treesize:67 [2021-07-13 20:19:36,993 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:19:36,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773132609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:36,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:36,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-07-13 20:19:36,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409089677] [2021-07-13 20:19:36,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:19:36,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:36,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:19:36,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:19:36,994 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) [2021-07-13 20:19:37,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:37,274 INFO L93 Difference]: Finished difference Result 1515 states and 6870 transitions. [2021-07-13 20:19:37,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:19:37,275 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 [2021-07-13 20:19:37,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:37,278 INFO L225 Difference]: With dead ends: 1515 [2021-07-13 20:19:37,278 INFO L226 Difference]: Without dead ends: 1464 [2021-07-13 20:19:37,279 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 373.6ms TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:19:37,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2021-07-13 20:19:37,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1269. [2021-07-13 20:19:37,296 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) [2021-07-13 20:19:37,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 6129 transitions. [2021-07-13 20:19:37,299 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 6129 transitions. Word has length 24 [2021-07-13 20:19:37,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:37,299 INFO L482 AbstractCegarLoop]: Abstraction has 1269 states and 6129 transitions. [2021-07-13 20:19:37,299 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) [2021-07-13 20:19:37,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 6129 transitions. [2021-07-13 20:19:37,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:19:37,302 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:37,302 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:37,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-07-13 20:19:37,502 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:37,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:37,503 INFO L82 PathProgramCache]: Analyzing trace with hash -687625467, now seen corresponding path program 22 times [2021-07-13 20:19:37,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:37,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167342320] [2021-07-13 20:19:37,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:37,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:37,559 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:19:37,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:37,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167342320] [2021-07-13 20:19:37,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167342320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:37,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855776106] [2021-07-13 20:19:37,559 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 [2021-07-13 20:19:37,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:19:37,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:37,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:19:37,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:37,718 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 [2021-07-13 20:19:37,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:37,722 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 [2021-07-13 20:19:37,722 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:37,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:37,752 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 [2021-07-13 20:19:37,752 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:37,755 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 [2021-07-13 20:19:37,756 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:37,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:37,784 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. [2021-07-13 20:19:37,784 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:95, output treesize:67 [2021-07-13 20:19:37,853 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:19:37,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855776106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:37,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:37,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-13 20:19:37,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212882916] [2021-07-13 20:19:37,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:19:37,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:37,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:19:37,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:19:37,854 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) [2021-07-13 20:19:40,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:40,019 INFO L93 Difference]: Finished difference Result 1808 states and 7860 transitions. [2021-07-13 20:19:40,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:19:40,019 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 [2021-07-13 20:19:40,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:40,023 INFO L225 Difference]: With dead ends: 1808 [2021-07-13 20:19:40,023 INFO L226 Difference]: Without dead ends: 1773 [2021-07-13 20:19:40,023 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 197.6ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:19:40,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1773 states. [2021-07-13 20:19:40,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1773 to 1189. [2021-07-13 20:19:40,041 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) [2021-07-13 20:19:40,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 5570 transitions. [2021-07-13 20:19:40,044 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 5570 transitions. Word has length 24 [2021-07-13 20:19:40,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:40,045 INFO L482 AbstractCegarLoop]: Abstraction has 1189 states and 5570 transitions. [2021-07-13 20:19:40,045 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) [2021-07-13 20:19:40,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 5570 transitions. [2021-07-13 20:19:40,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:19:40,047 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:40,047 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:40,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:40,247 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:40,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:40,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1433709073, now seen corresponding path program 22 times [2021-07-13 20:19:40,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:40,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141911264] [2021-07-13 20:19:40,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:40,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:40,360 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:40,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:40,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141911264] [2021-07-13 20:19:40,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141911264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:40,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245956750] [2021-07-13 20:19:40,360 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 [2021-07-13 20:19:40,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:19:40,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:40,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:19:40,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:40,898 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:40,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245956750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:40,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:40,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-07-13 20:19:40,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192863431] [2021-07-13 20:19:40,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:19:40,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:40,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:19:40,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:19:40,899 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) [2021-07-13 20:19:41,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:41,158 INFO L93 Difference]: Finished difference Result 1244 states and 5694 transitions. [2021-07-13 20:19:41,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:19:41,158 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 [2021-07-13 20:19:41,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:41,161 INFO L225 Difference]: With dead ends: 1244 [2021-07-13 20:19:41,161 INFO L226 Difference]: Without dead ends: 1230 [2021-07-13 20:19:41,161 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 559.5ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:19:41,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2021-07-13 20:19:41,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1201. [2021-07-13 20:19:41,175 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) [2021-07-13 20:19:41,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 5592 transitions. [2021-07-13 20:19:41,178 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 5592 transitions. Word has length 24 [2021-07-13 20:19:41,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:41,178 INFO L482 AbstractCegarLoop]: Abstraction has 1201 states and 5592 transitions. [2021-07-13 20:19:41,178 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) [2021-07-13 20:19:41,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 5592 transitions. [2021-07-13 20:19:41,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:19:41,181 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:41,181 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:41,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:41,381 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:41,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:41,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1178323821, now seen corresponding path program 23 times [2021-07-13 20:19:41,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:41,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785999179] [2021-07-13 20:19:41,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:41,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:41,533 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:41,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:41,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785999179] [2021-07-13 20:19:41,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785999179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:41,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651266802] [2021-07-13 20:19:41,533 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 [2021-07-13 20:19:41,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:19:41,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:41,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:19:41,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:42,083 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:42,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651266802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:42,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:42,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-07-13 20:19:42,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294221724] [2021-07-13 20:19:42,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:19:42,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:42,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:19:42,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:19:42,084 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) [2021-07-13 20:19:42,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:42,237 INFO L93 Difference]: Finished difference Result 1221 states and 5632 transitions. [2021-07-13 20:19:42,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:19:42,237 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 [2021-07-13 20:19:42,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:42,240 INFO L225 Difference]: With dead ends: 1221 [2021-07-13 20:19:42,240 INFO L226 Difference]: Without dead ends: 1217 [2021-07-13 20:19:42,240 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 547.9ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:19:42,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2021-07-13 20:19:42,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 1205. [2021-07-13 20:19:42,255 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) [2021-07-13 20:19:42,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 5598 transitions. [2021-07-13 20:19:42,258 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 5598 transitions. Word has length 24 [2021-07-13 20:19:42,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:42,258 INFO L482 AbstractCegarLoop]: Abstraction has 1205 states and 5598 transitions. [2021-07-13 20:19:42,258 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) [2021-07-13 20:19:42,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 5598 transitions. [2021-07-13 20:19:42,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:19:42,260 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:42,260 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:42,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-07-13 20:19:42,476 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:42,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:42,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1461893903, now seen corresponding path program 24 times [2021-07-13 20:19:42,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:42,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950844827] [2021-07-13 20:19:42,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:42,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:42,575 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:42,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:42,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950844827] [2021-07-13 20:19:42,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950844827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:42,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23846864] [2021-07-13 20:19:42,575 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 [2021-07-13 20:19:42,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:19:42,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:42,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:19:42,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:43,023 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 [2021-07-13 20:19:43,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:43,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:43,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:43,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-07-13 20:19:43,072 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:43,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23846864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:43,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:43,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:19:43,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016386825] [2021-07-13 20:19:43,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:19:43,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:43,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:19:43,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:19:43,073 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) [2021-07-13 20:19:43,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:43,302 INFO L93 Difference]: Finished difference Result 1274 states and 5779 transitions. [2021-07-13 20:19:43,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:19:43,302 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 [2021-07-13 20:19:43,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:43,304 INFO L225 Difference]: With dead ends: 1274 [2021-07-13 20:19:43,304 INFO L226 Difference]: Without dead ends: 1261 [2021-07-13 20:19:43,305 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 500.0ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:19:43,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2021-07-13 20:19:43,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 1207. [2021-07-13 20:19:43,319 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) [2021-07-13 20:19:43,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 5609 transitions. [2021-07-13 20:19:43,322 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 5609 transitions. Word has length 24 [2021-07-13 20:19:43,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:43,322 INFO L482 AbstractCegarLoop]: Abstraction has 1207 states and 5609 transitions. [2021-07-13 20:19:43,322 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) [2021-07-13 20:19:43,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 5609 transitions. [2021-07-13 20:19:43,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:19:43,324 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:43,324 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:43,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-07-13 20:19:43,525 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:43,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:43,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1808359469, now seen corresponding path program 25 times [2021-07-13 20:19:43,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:43,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228565936] [2021-07-13 20:19:43,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:43,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:43,614 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:43,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:43,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228565936] [2021-07-13 20:19:43,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228565936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:43,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045863733] [2021-07-13 20:19:43,615 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 [2021-07-13 20:19:43,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:43,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:19:43,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:44,111 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:44,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045863733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:44,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:44,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-07-13 20:19:44,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420307946] [2021-07-13 20:19:44,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:19:44,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:44,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:19:44,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:19:44,113 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) [2021-07-13 20:19:44,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:44,406 INFO L93 Difference]: Finished difference Result 1233 states and 5664 transitions. [2021-07-13 20:19:44,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:19:44,406 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 [2021-07-13 20:19:44,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:44,409 INFO L225 Difference]: With dead ends: 1233 [2021-07-13 20:19:44,409 INFO L226 Difference]: Without dead ends: 1225 [2021-07-13 20:19:44,409 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 608.2ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:19:44,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2021-07-13 20:19:44,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 1205. [2021-07-13 20:19:44,424 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) [2021-07-13 20:19:44,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 5594 transitions. [2021-07-13 20:19:44,427 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 5594 transitions. Word has length 24 [2021-07-13 20:19:44,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:44,427 INFO L482 AbstractCegarLoop]: Abstraction has 1205 states and 5594 transitions. [2021-07-13 20:19:44,427 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) [2021-07-13 20:19:44,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 5594 transitions. [2021-07-13 20:19:44,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:19:44,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:44,429 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:44,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:44,630 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:44,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:44,630 INFO L82 PathProgramCache]: Analyzing trace with hash -800483755, now seen corresponding path program 26 times [2021-07-13 20:19:44,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:44,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247933853] [2021-07-13 20:19:44,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:44,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:44,766 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:44,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:44,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247933853] [2021-07-13 20:19:44,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247933853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:44,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522068966] [2021-07-13 20:19:44,766 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 [2021-07-13 20:19:44,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:19:44,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:44,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:19:44,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:45,065 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 [2021-07-13 20:19:45,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:45,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:45,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:45,075 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-07-13 20:19:45,118 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:45,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522068966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:45,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:45,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:19:45,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923854043] [2021-07-13 20:19:45,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:19:45,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:45,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:19:45,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:19:45,120 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) [2021-07-13 20:19:45,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:45,508 INFO L93 Difference]: Finished difference Result 1253 states and 5719 transitions. [2021-07-13 20:19:45,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:19:45,508 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 [2021-07-13 20:19:45,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:45,510 INFO L225 Difference]: With dead ends: 1253 [2021-07-13 20:19:45,511 INFO L226 Difference]: Without dead ends: 1240 [2021-07-13 20:19:45,511 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 599.0ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:19:45,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-07-13 20:19:45,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1201. [2021-07-13 20:19:45,524 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) [2021-07-13 20:19:45,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 5582 transitions. [2021-07-13 20:19:45,528 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 5582 transitions. Word has length 24 [2021-07-13 20:19:45,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:45,528 INFO L482 AbstractCegarLoop]: Abstraction has 1201 states and 5582 transitions. [2021-07-13 20:19:45,528 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) [2021-07-13 20:19:45,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 5582 transitions. [2021-07-13 20:19:45,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:19:45,530 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:45,530 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:45,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:45,741 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:45,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:45,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1506985901, now seen corresponding path program 27 times [2021-07-13 20:19:45,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:45,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332457773] [2021-07-13 20:19:45,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:45,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:45,888 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:45,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:45,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332457773] [2021-07-13 20:19:45,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332457773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:45,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817251753] [2021-07-13 20:19:45,888 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 [2021-07-13 20:19:45,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:19:45,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:45,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:19:45,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:46,342 INFO L446 ElimStorePlain]: Different costs {0=[node_2], 1=[v_prenex_27]} [2021-07-13 20:19:46,346 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 [2021-07-13 20:19:46,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:46,373 INFO L628 ElimStorePlain]: treesize reduction 52, result has 37.3 percent of original size [2021-07-13 20:19:46,373 INFO L518 ElimStorePlain]: Eliminatee v_prenex_27 vanished before elimination [2021-07-13 20:19:46,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:46,374 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:90, output treesize:31 [2021-07-13 20:19:46,418 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:46,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817251753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:46,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:46,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:19:46,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624669242] [2021-07-13 20:19:46,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:19:46,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:46,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:19:46,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:19:46,419 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) [2021-07-13 20:19:46,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:46,995 INFO L93 Difference]: Finished difference Result 1242 states and 5695 transitions. [2021-07-13 20:19:46,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:19:46,996 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 [2021-07-13 20:19:46,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:46,998 INFO L225 Difference]: With dead ends: 1242 [2021-07-13 20:19:46,998 INFO L226 Difference]: Without dead ends: 1227 [2021-07-13 20:19:46,998 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 823.8ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:19:46,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2021-07-13 20:19:47,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1209. [2021-07-13 20:19:47,013 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) [2021-07-13 20:19:47,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 5616 transitions. [2021-07-13 20:19:47,016 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 5616 transitions. Word has length 24 [2021-07-13 20:19:47,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:47,016 INFO L482 AbstractCegarLoop]: Abstraction has 1209 states and 5616 transitions. [2021-07-13 20:19:47,016 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) [2021-07-13 20:19:47,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 5616 transitions. [2021-07-13 20:19:47,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:19:47,018 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:47,019 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:47,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-07-13 20:19:47,219 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:47,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:47,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1553209715, now seen corresponding path program 28 times [2021-07-13 20:19:47,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:47,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442446288] [2021-07-13 20:19:47,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:47,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:47,326 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:19:47,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:47,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442446288] [2021-07-13 20:19:47,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442446288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:47,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99733898] [2021-07-13 20:19:47,326 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 [2021-07-13 20:19:47,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:19:47,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:47,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:19:47,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:47,541 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 [2021-07-13 20:19:47,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:47,545 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 [2021-07-13 20:19:47,546 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:47,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:47,580 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. [2021-07-13 20:19:47,580 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-07-13 20:19:47,714 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:19:47,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99733898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:47,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:47,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-07-13 20:19:47,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460577199] [2021-07-13 20:19:47,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:19:47,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:47,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:19:47,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:19:47,715 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) [2021-07-13 20:19:47,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:47,996 INFO L93 Difference]: Finished difference Result 1237 states and 5305 transitions. [2021-07-13 20:19:47,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:19:47,996 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 [2021-07-13 20:19:47,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:47,999 INFO L225 Difference]: With dead ends: 1237 [2021-07-13 20:19:47,999 INFO L226 Difference]: Without dead ends: 1213 [2021-07-13 20:19:47,999 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 429.1ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:19:48,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2021-07-13 20:19:48,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1052. [2021-07-13 20:19:48,012 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) [2021-07-13 20:19:48,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 4839 transitions. [2021-07-13 20:19:48,015 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 4839 transitions. Word has length 24 [2021-07-13 20:19:48,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:48,015 INFO L482 AbstractCegarLoop]: Abstraction has 1052 states and 4839 transitions. [2021-07-13 20:19:48,015 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) [2021-07-13 20:19:48,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 4839 transitions. [2021-07-13 20:19:48,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:19:48,017 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:48,017 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:48,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:48,218 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:48,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:48,218 INFO L82 PathProgramCache]: Analyzing trace with hash 528495791, now seen corresponding path program 29 times [2021-07-13 20:19:48,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:48,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385492466] [2021-07-13 20:19:48,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:48,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:48,344 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:48,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:48,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385492466] [2021-07-13 20:19:48,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385492466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:48,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963439346] [2021-07-13 20:19:48,344 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 [2021-07-13 20:19:48,385 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 20:19:48,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:48,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:19:48,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:48,833 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:48,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963439346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:48,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:48,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-07-13 20:19:48,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261457072] [2021-07-13 20:19:48,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:19:48,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:48,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:19:48,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:19:48,834 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) [2021-07-13 20:19:49,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:49,076 INFO L93 Difference]: Finished difference Result 1096 states and 4937 transitions. [2021-07-13 20:19:49,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:19:49,077 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 [2021-07-13 20:19:49,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:49,079 INFO L225 Difference]: With dead ends: 1096 [2021-07-13 20:19:49,079 INFO L226 Difference]: Without dead ends: 1074 [2021-07-13 20:19:49,079 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 511.7ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:19:49,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-07-13 20:19:49,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 1050. [2021-07-13 20:19:49,092 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) [2021-07-13 20:19:49,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 4824 transitions. [2021-07-13 20:19:49,094 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 4824 transitions. Word has length 24 [2021-07-13 20:19:49,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:49,094 INFO L482 AbstractCegarLoop]: Abstraction has 1050 states and 4824 transitions. [2021-07-13 20:19:49,094 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) [2021-07-13 20:19:49,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 4824 transitions. [2021-07-13 20:19:49,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:19:49,096 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:49,096 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:49,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:49,312 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:49,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:49,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1069230183, now seen corresponding path program 30 times [2021-07-13 20:19:49,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:49,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062366044] [2021-07-13 20:19:49,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:49,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:49,498 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:49,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:49,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062366044] [2021-07-13 20:19:49,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062366044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:49,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462960624] [2021-07-13 20:19:49,498 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 [2021-07-13 20:19:49,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:19:49,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:49,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:19:49,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:49,801 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 [2021-07-13 20:19:49,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:49,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:49,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:49,811 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-07-13 20:19:49,856 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:49,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462960624] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:49,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:49,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:19:49,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917865739] [2021-07-13 20:19:49,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:19:49,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:49,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:19:49,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:19:49,857 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) [2021-07-13 20:19:50,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:50,013 INFO L93 Difference]: Finished difference Result 1099 states and 4955 transitions. [2021-07-13 20:19:50,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:19:50,013 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 [2021-07-13 20:19:50,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:50,015 INFO L225 Difference]: With dead ends: 1099 [2021-07-13 20:19:50,015 INFO L226 Difference]: Without dead ends: 1086 [2021-07-13 20:19:50,015 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 430.0ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:19:50,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-07-13 20:19:50,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 1046. [2021-07-13 20:19:50,028 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) [2021-07-13 20:19:50,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 4812 transitions. [2021-07-13 20:19:50,030 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 4812 transitions. Word has length 24 [2021-07-13 20:19:50,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:50,030 INFO L482 AbstractCegarLoop]: Abstraction has 1046 states and 4812 transitions. [2021-07-13 20:19:50,030 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) [2021-07-13 20:19:50,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 4812 transitions. [2021-07-13 20:19:50,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:19:50,032 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:50,032 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:50,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-07-13 20:19:50,233 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:50,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:50,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1249973783, now seen corresponding path program 31 times [2021-07-13 20:19:50,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:50,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948112337] [2021-07-13 20:19:50,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:50,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:50,444 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:50,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:50,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948112337] [2021-07-13 20:19:50,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948112337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:50,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455139120] [2021-07-13 20:19:50,444 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 [2021-07-13 20:19:50,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:50,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:19:50,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:50,823 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:50,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455139120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:50,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:50,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:19:50,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417997608] [2021-07-13 20:19:50,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:19:50,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:50,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:19:50,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:19:50,824 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) [2021-07-13 20:19:51,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:51,110 INFO L93 Difference]: Finished difference Result 1140 states and 5064 transitions. [2021-07-13 20:19:51,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:19:51,110 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 [2021-07-13 20:19:51,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:51,113 INFO L225 Difference]: With dead ends: 1140 [2021-07-13 20:19:51,113 INFO L226 Difference]: Without dead ends: 1108 [2021-07-13 20:19:51,113 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 562.3ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:19:51,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-07-13 20:19:51,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 1059. [2021-07-13 20:19:51,126 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) [2021-07-13 20:19:51,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 4847 transitions. [2021-07-13 20:19:51,129 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 4847 transitions. Word has length 24 [2021-07-13 20:19:51,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:51,129 INFO L482 AbstractCegarLoop]: Abstraction has 1059 states and 4847 transitions. [2021-07-13 20:19:51,129 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) [2021-07-13 20:19:51,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 4847 transitions. [2021-07-13 20:19:51,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:19:51,131 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:51,131 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:51,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:51,332 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:51,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:51,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1775732329, now seen corresponding path program 32 times [2021-07-13 20:19:51,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:51,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621737675] [2021-07-13 20:19:51,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:51,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:51,539 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:51,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:51,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621737675] [2021-07-13 20:19:51,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621737675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:51,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063387493] [2021-07-13 20:19:51,539 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 [2021-07-13 20:19:51,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:19:51,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:51,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:19:51,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:51,841 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 [2021-07-13 20:19:51,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:51,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:51,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:51,850 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-07-13 20:19:51,888 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:51,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063387493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:51,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:51,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:19:51,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436743285] [2021-07-13 20:19:51,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:19:51,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:51,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:19:51,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:19:51,889 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) [2021-07-13 20:19:52,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:52,193 INFO L93 Difference]: Finished difference Result 1101 states and 4957 transitions. [2021-07-13 20:19:52,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:19:52,193 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 [2021-07-13 20:19:52,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:52,196 INFO L225 Difference]: With dead ends: 1101 [2021-07-13 20:19:52,196 INFO L226 Difference]: Without dead ends: 1086 [2021-07-13 20:19:52,196 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 607.5ms TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:19:52,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-07-13 20:19:52,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 1061. [2021-07-13 20:19:52,217 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) [2021-07-13 20:19:52,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 4858 transitions. [2021-07-13 20:19:52,220 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 4858 transitions. Word has length 24 [2021-07-13 20:19:52,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:52,220 INFO L482 AbstractCegarLoop]: Abstraction has 1061 states and 4858 transitions. [2021-07-13 20:19:52,220 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) [2021-07-13 20:19:52,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 4858 transitions. [2021-07-13 20:19:52,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:19:52,222 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:52,222 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:52,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:52,423 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:52,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:52,423 INFO L82 PathProgramCache]: Analyzing trace with hash 2102593587, now seen corresponding path program 33 times [2021-07-13 20:19:52,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:52,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434255509] [2021-07-13 20:19:52,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:52,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:52,566 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:52,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:52,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434255509] [2021-07-13 20:19:52,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434255509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:52,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113440809] [2021-07-13 20:19:52,567 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 [2021-07-13 20:19:52,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:19:52,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:52,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:19:52,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:52,886 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:52,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113440809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:52,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:52,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:19:52,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808647049] [2021-07-13 20:19:52,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:19:52,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:52,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:19:52,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:19:52,887 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) [2021-07-13 20:19:53,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:53,110 INFO L93 Difference]: Finished difference Result 1142 states and 5070 transitions. [2021-07-13 20:19:53,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:19:53,111 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 [2021-07-13 20:19:53,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:53,113 INFO L225 Difference]: With dead ends: 1142 [2021-07-13 20:19:53,113 INFO L226 Difference]: Without dead ends: 1110 [2021-07-13 20:19:53,113 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 438.3ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:19:53,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-07-13 20:19:53,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 1048. [2021-07-13 20:19:53,126 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) [2021-07-13 20:19:53,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 4818 transitions. [2021-07-13 20:19:53,128 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 4818 transitions. Word has length 24 [2021-07-13 20:19:53,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:53,128 INFO L482 AbstractCegarLoop]: Abstraction has 1048 states and 4818 transitions. [2021-07-13 20:19:53,128 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) [2021-07-13 20:19:53,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 4818 transitions. [2021-07-13 20:19:53,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:19:53,130 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:53,130 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:53,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:53,332 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:53,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:53,332 INFO L82 PathProgramCache]: Analyzing trace with hash -2029878931, now seen corresponding path program 34 times [2021-07-13 20:19:53,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:53,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594784103] [2021-07-13 20:19:53,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:53,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:53,476 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:53,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:53,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594784103] [2021-07-13 20:19:53,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594784103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:53,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593464069] [2021-07-13 20:19:53,476 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 [2021-07-13 20:19:53,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:19:53,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:53,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:19:53,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:53,948 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:53,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593464069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:53,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:53,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-07-13 20:19:53,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006422061] [2021-07-13 20:19:53,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:19:53,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:53,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:19:53,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:19:53,949 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) [2021-07-13 20:19:54,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:54,409 INFO L93 Difference]: Finished difference Result 1070 states and 4863 transitions. [2021-07-13 20:19:54,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:19:54,410 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 [2021-07-13 20:19:54,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:54,412 INFO L225 Difference]: With dead ends: 1070 [2021-07-13 20:19:54,412 INFO L226 Difference]: Without dead ends: 1066 [2021-07-13 20:19:54,412 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 823.0ms TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:19:54,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2021-07-13 20:19:54,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1048. [2021-07-13 20:19:54,424 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) [2021-07-13 20:19:54,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 4814 transitions. [2021-07-13 20:19:54,427 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 4814 transitions. Word has length 24 [2021-07-13 20:19:54,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:54,427 INFO L482 AbstractCegarLoop]: Abstraction has 1048 states and 4814 transitions. [2021-07-13 20:19:54,427 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) [2021-07-13 20:19:54,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 4814 transitions. [2021-07-13 20:19:54,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:19:54,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:54,429 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:54,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:54,630 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:54,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:54,630 INFO L82 PathProgramCache]: Analyzing trace with hash 2094923731, now seen corresponding path program 35 times [2021-07-13 20:19:54,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:54,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8396955] [2021-07-13 20:19:54,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:54,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:54,776 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:54,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:54,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8396955] [2021-07-13 20:19:54,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8396955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:54,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451200863] [2021-07-13 20:19:54,777 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 [2021-07-13 20:19:54,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:19:54,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:54,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:19:54,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:55,156 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 [2021-07-13 20:19:55,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:55,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:55,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:55,165 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-07-13 20:19:55,201 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:55,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451200863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:55,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:55,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:19:55,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588713094] [2021-07-13 20:19:55,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:19:55,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:55,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:19:55,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:19:55,201 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) [2021-07-13 20:19:55,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:55,427 INFO L93 Difference]: Finished difference Result 1107 states and 4970 transitions. [2021-07-13 20:19:55,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:19:55,428 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 [2021-07-13 20:19:55,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:55,430 INFO L225 Difference]: With dead ends: 1107 [2021-07-13 20:19:55,430 INFO L226 Difference]: Without dead ends: 1092 [2021-07-13 20:19:55,430 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 520.5ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:19:55,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2021-07-13 20:19:55,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 1050. [2021-07-13 20:19:55,443 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) [2021-07-13 20:19:55,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 4825 transitions. [2021-07-13 20:19:55,445 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 4825 transitions. Word has length 24 [2021-07-13 20:19:55,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:55,445 INFO L482 AbstractCegarLoop]: Abstraction has 1050 states and 4825 transitions. [2021-07-13 20:19:55,445 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) [2021-07-13 20:19:55,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 4825 transitions. [2021-07-13 20:19:55,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:19:55,447 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:55,447 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:55,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:55,648 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:55,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:55,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1420116913, now seen corresponding path program 36 times [2021-07-13 20:19:55,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:55,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849640660] [2021-07-13 20:19:55,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:55,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:55,756 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:55,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:55,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849640660] [2021-07-13 20:19:55,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849640660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:55,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724878130] [2021-07-13 20:19:55,756 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 [2021-07-13 20:19:55,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:19:55,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:55,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:19:55,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:56,205 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:56,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724878130] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:56,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:56,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-07-13 20:19:56,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217717862] [2021-07-13 20:19:56,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:19:56,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:56,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:19:56,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:19:56,206 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) [2021-07-13 20:19:56,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:56,568 INFO L93 Difference]: Finished difference Result 1072 states and 4870 transitions. [2021-07-13 20:19:56,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:19:56,568 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 [2021-07-13 20:19:56,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:56,570 INFO L225 Difference]: With dead ends: 1072 [2021-07-13 20:19:56,570 INFO L226 Difference]: Without dead ends: 1064 [2021-07-13 20:19:56,570 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 666.1ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:19:56,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2021-07-13 20:19:56,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 1046. [2021-07-13 20:19:56,583 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) [2021-07-13 20:19:56,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 4805 transitions. [2021-07-13 20:19:56,585 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 4805 transitions. Word has length 24 [2021-07-13 20:19:56,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:56,586 INFO L482 AbstractCegarLoop]: Abstraction has 1046 states and 4805 transitions. [2021-07-13 20:19:56,586 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) [2021-07-13 20:19:56,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 4805 transitions. [2021-07-13 20:19:56,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:19:56,587 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:56,587 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:56,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2021-07-13 20:19:56,788 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:56,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:56,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1692504397, now seen corresponding path program 37 times [2021-07-13 20:19:56,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:56,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836044393] [2021-07-13 20:19:56,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:56,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:56,903 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:56,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:56,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836044393] [2021-07-13 20:19:56,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836044393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:56,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776518210] [2021-07-13 20:19:56,903 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 [2021-07-13 20:19:56,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:56,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:19:56,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:57,476 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:57,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776518210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:57,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:57,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-07-13 20:19:57,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388565109] [2021-07-13 20:19:57,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:19:57,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:57,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:19:57,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:19:57,477 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) [2021-07-13 20:19:57,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:57,803 INFO L93 Difference]: Finished difference Result 1067 states and 4747 transitions. [2021-07-13 20:19:57,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:19:57,804 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 [2021-07-13 20:19:57,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:57,806 INFO L225 Difference]: With dead ends: 1067 [2021-07-13 20:19:57,806 INFO L226 Difference]: Without dead ends: 1049 [2021-07-13 20:19:57,806 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 727.8ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:19:57,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2021-07-13 20:19:57,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 1009. [2021-07-13 20:19:57,817 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) [2021-07-13 20:19:57,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 4602 transitions. [2021-07-13 20:19:57,820 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 4602 transitions. Word has length 24 [2021-07-13 20:19:57,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:57,820 INFO L482 AbstractCegarLoop]: Abstraction has 1009 states and 4602 transitions. [2021-07-13 20:19:57,820 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) [2021-07-13 20:19:57,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 4602 transitions. [2021-07-13 20:19:57,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:19:57,822 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:57,822 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:58,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:58,022 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:58,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:58,023 INFO L82 PathProgramCache]: Analyzing trace with hash -12313431, now seen corresponding path program 38 times [2021-07-13 20:19:58,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:58,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898873587] [2021-07-13 20:19:58,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:58,107 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:58,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:58,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898873587] [2021-07-13 20:19:58,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898873587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:58,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404339647] [2021-07-13 20:19:58,107 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 [2021-07-13 20:19:58,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:19:58,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:58,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 20:19:58,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:58,357 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 [2021-07-13 20:19:58,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:58,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:58,367 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. [2021-07-13 20:19:58,367 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:33 [2021-07-13 20:19:58,415 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:58,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404339647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:58,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:58,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-07-13 20:19:58,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923738257] [2021-07-13 20:19:58,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:19:58,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:58,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:19:58,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:19:58,416 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) [2021-07-13 20:19:58,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:58,681 INFO L93 Difference]: Finished difference Result 1207 states and 4868 transitions. [2021-07-13 20:19:58,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:19:58,681 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 [2021-07-13 20:19:58,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:58,683 INFO L225 Difference]: With dead ends: 1207 [2021-07-13 20:19:58,683 INFO L226 Difference]: Without dead ends: 1179 [2021-07-13 20:19:58,683 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 431.9ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:19:58,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2021-07-13 20:19:58,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 925. [2021-07-13 20:19:58,696 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) [2021-07-13 20:19:58,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 4084 transitions. [2021-07-13 20:19:58,698 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 4084 transitions. Word has length 24 [2021-07-13 20:19:58,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:58,698 INFO L482 AbstractCegarLoop]: Abstraction has 925 states and 4084 transitions. [2021-07-13 20:19:58,698 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) [2021-07-13 20:19:58,698 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 4084 transitions. [2021-07-13 20:19:58,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:19:58,700 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:58,700 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:58,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-07-13 20:19:58,900 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:58,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:58,901 INFO L82 PathProgramCache]: Analyzing trace with hash -919528497, now seen corresponding path program 39 times [2021-07-13 20:19:58,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:58,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894834256] [2021-07-13 20:19:58,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:58,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:59,004 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:59,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:59,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894834256] [2021-07-13 20:19:59,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894834256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:59,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371691963] [2021-07-13 20:19:59,004 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 [2021-07-13 20:19:59,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:19:59,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:59,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:19:59,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:59,514 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:59,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371691963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:59,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:59,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-07-13 20:19:59,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283839396] [2021-07-13 20:19:59,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:19:59,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:59,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:19:59,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:19:59,515 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) [2021-07-13 20:19:59,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:59,982 INFO L93 Difference]: Finished difference Result 955 states and 4153 transitions. [2021-07-13 20:19:59,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:19:59,982 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 [2021-07-13 20:19:59,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:59,984 INFO L225 Difference]: With dead ends: 955 [2021-07-13 20:19:59,984 INFO L226 Difference]: Without dead ends: 951 [2021-07-13 20:19:59,985 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 805.3ms TimeCoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:19:59,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-07-13 20:19:59,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 927. [2021-07-13 20:19:59,995 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) [2021-07-13 20:19:59,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 4085 transitions. [2021-07-13 20:19:59,997 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 4085 transitions. Word has length 24 [2021-07-13 20:19:59,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:59,997 INFO L482 AbstractCegarLoop]: Abstraction has 927 states and 4085 transitions. [2021-07-13 20:19:59,997 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) [2021-07-13 20:19:59,997 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 4085 transitions. [2021-07-13 20:19:59,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:19:59,999 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:59,999 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:00,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2021-07-13 20:20:00,217 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:00,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:00,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1203098579, now seen corresponding path program 40 times [2021-07-13 20:20:00,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:00,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378350381] [2021-07-13 20:20:00,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:00,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:00,373 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:00,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:00,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378350381] [2021-07-13 20:20:00,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378350381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:00,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395906159] [2021-07-13 20:20:00,374 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 [2021-07-13 20:20:00,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:20:00,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:00,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:20:00,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:00,789 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 [2021-07-13 20:20:00,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:00,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:00,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:20:00,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-07-13 20:20:00,834 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:00,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395906159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:00,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:00,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:20:00,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621206823] [2021-07-13 20:20:00,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:20:00,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:00,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:20:00,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:20:00,835 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) [2021-07-13 20:20:01,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:01,309 INFO L93 Difference]: Finished difference Result 1002 states and 4289 transitions. [2021-07-13 20:20:01,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:20:01,309 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 [2021-07-13 20:20:01,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:01,311 INFO L225 Difference]: With dead ends: 1002 [2021-07-13 20:20:01,311 INFO L226 Difference]: Without dead ends: 989 [2021-07-13 20:20:01,312 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 779.5ms TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:20:01,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2021-07-13 20:20:01,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 931. [2021-07-13 20:20:01,322 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) [2021-07-13 20:20:01,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 4103 transitions. [2021-07-13 20:20:01,324 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 4103 transitions. Word has length 24 [2021-07-13 20:20:01,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:01,324 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 4103 transitions. [2021-07-13 20:20:01,324 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) [2021-07-13 20:20:01,324 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 4103 transitions. [2021-07-13 20:20:01,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:20:01,326 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:01,326 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:01,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-07-13 20:20:01,529 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:01,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:01,529 INFO L82 PathProgramCache]: Analyzing trace with hash 2067154793, now seen corresponding path program 41 times [2021-07-13 20:20:01,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:01,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336799092] [2021-07-13 20:20:01,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:01,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:01,633 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:01,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:01,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336799092] [2021-07-13 20:20:01,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336799092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:01,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269654308] [2021-07-13 20:20:01,633 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 [2021-07-13 20:20:01,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:20:01,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:01,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:20:01,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:02,184 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:02,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269654308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:02,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:02,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-07-13 20:20:02,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306083484] [2021-07-13 20:20:02,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:20:02,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:02,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:20:02,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:20:02,185 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) [2021-07-13 20:20:02,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:02,325 INFO L93 Difference]: Finished difference Result 963 states and 4175 transitions. [2021-07-13 20:20:02,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:20:02,325 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 [2021-07-13 20:20:02,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:02,327 INFO L225 Difference]: With dead ends: 963 [2021-07-13 20:20:02,327 INFO L226 Difference]: Without dead ends: 955 [2021-07-13 20:20:02,327 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 469.1ms TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:20:02,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-07-13 20:20:02,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 929. [2021-07-13 20:20:02,338 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) [2021-07-13 20:20:02,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 4088 transitions. [2021-07-13 20:20:02,340 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 4088 transitions. Word has length 24 [2021-07-13 20:20:02,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:02,340 INFO L482 AbstractCegarLoop]: Abstraction has 929 states and 4088 transitions. [2021-07-13 20:20:02,340 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) [2021-07-13 20:20:02,341 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 4088 transitions. [2021-07-13 20:20:02,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:20:02,342 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:02,342 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:02,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-07-13 20:20:02,543 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:02,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:02,543 INFO L82 PathProgramCache]: Analyzing trace with hash -541688431, now seen corresponding path program 42 times [2021-07-13 20:20:02,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:02,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157031889] [2021-07-13 20:20:02,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:02,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:02,653 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:02,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:02,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157031889] [2021-07-13 20:20:02,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157031889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:02,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376953478] [2021-07-13 20:20:02,654 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 [2021-07-13 20:20:02,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:20:02,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:02,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:20:02,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:02,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-13 20:20:02,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:02,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:02,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:20:02,981 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-07-13 20:20:03,020 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:03,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376953478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:03,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:03,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:20:03,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052654628] [2021-07-13 20:20:03,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:20:03,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:03,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:20:03,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:20:03,021 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) [2021-07-13 20:20:03,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:03,194 INFO L93 Difference]: Finished difference Result 978 states and 4219 transitions. [2021-07-13 20:20:03,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:20:03,195 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 [2021-07-13 20:20:03,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:03,197 INFO L225 Difference]: With dead ends: 978 [2021-07-13 20:20:03,197 INFO L226 Difference]: Without dead ends: 965 [2021-07-13 20:20:03,197 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 386.7ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:20:03,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2021-07-13 20:20:03,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 921. [2021-07-13 20:20:03,207 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) [2021-07-13 20:20:03,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 4064 transitions. [2021-07-13 20:20:03,209 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 4064 transitions. Word has length 24 [2021-07-13 20:20:03,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:03,209 INFO L482 AbstractCegarLoop]: Abstraction has 921 states and 4064 transitions. [2021-07-13 20:20:03,209 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) [2021-07-13 20:20:03,209 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 4064 transitions. [2021-07-13 20:20:03,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:20:03,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:03,211 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:03,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:03,413 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:03,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:03,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1248190577, now seen corresponding path program 43 times [2021-07-13 20:20:03,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:03,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505244550] [2021-07-13 20:20:03,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:03,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:03,560 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:03,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:03,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505244550] [2021-07-13 20:20:03,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505244550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:03,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125419085] [2021-07-13 20:20:03,561 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 [2021-07-13 20:20:03,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:03,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:20:03,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:03,852 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 [2021-07-13 20:20:03,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:03,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:03,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:20:03,861 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-07-13 20:20:03,899 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:03,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125419085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:03,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:03,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:20:03,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734813545] [2021-07-13 20:20:03,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:20:03,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:03,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:20:03,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:20:03,901 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) [2021-07-13 20:20:04,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:04,164 INFO L93 Difference]: Finished difference Result 962 states and 4159 transitions. [2021-07-13 20:20:04,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:20:04,164 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 [2021-07-13 20:20:04,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:04,166 INFO L225 Difference]: With dead ends: 962 [2021-07-13 20:20:04,166 INFO L226 Difference]: Without dead ends: 947 [2021-07-13 20:20:04,166 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 503.4ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:20:04,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2021-07-13 20:20:04,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 919. [2021-07-13 20:20:04,177 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) [2021-07-13 20:20:04,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 4053 transitions. [2021-07-13 20:20:04,179 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 4053 transitions. Word has length 24 [2021-07-13 20:20:04,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:04,179 INFO L482 AbstractCegarLoop]: Abstraction has 919 states and 4053 transitions. [2021-07-13 20:20:04,179 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) [2021-07-13 20:20:04,179 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 4053 transitions. [2021-07-13 20:20:04,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:20:04,181 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:04,181 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:04,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:04,381 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:04,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:04,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1188274925, now seen corresponding path program 44 times [2021-07-13 20:20:04,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:04,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882296820] [2021-07-13 20:20:04,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:04,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:04,499 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:04,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:04,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882296820] [2021-07-13 20:20:04,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882296820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:04,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245216501] [2021-07-13 20:20:04,500 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 [2021-07-13 20:20:04,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:20:04,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:04,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:20:04,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:04,899 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:04,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245216501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:04,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:04,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-07-13 20:20:04,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603539331] [2021-07-13 20:20:04,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:20:04,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:04,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:20:04,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:20:04,900 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) [2021-07-13 20:20:05,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:05,311 INFO L93 Difference]: Finished difference Result 945 states and 4108 transitions. [2021-07-13 20:20:05,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:20:05,311 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 [2021-07-13 20:20:05,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:05,313 INFO L225 Difference]: With dead ends: 945 [2021-07-13 20:20:05,313 INFO L226 Difference]: Without dead ends: 943 [2021-07-13 20:20:05,314 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 682.1ms TimeCoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:20:05,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-07-13 20:20:05,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 917. [2021-07-13 20:20:05,325 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) [2021-07-13 20:20:05,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 4046 transitions. [2021-07-13 20:20:05,327 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 4046 transitions. Word has length 24 [2021-07-13 20:20:05,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:05,327 INFO L482 AbstractCegarLoop]: Abstraction has 917 states and 4046 transitions. [2021-07-13 20:20:05,327 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) [2021-07-13 20:20:05,327 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 4046 transitions. [2021-07-13 20:20:05,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:20:05,329 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:05,329 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:05,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-07-13 20:20:05,530 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:05,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:05,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1471845007, now seen corresponding path program 45 times [2021-07-13 20:20:05,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:05,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752252090] [2021-07-13 20:20:05,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:05,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:05,643 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:05,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:05,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752252090] [2021-07-13 20:20:05,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752252090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:05,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956030909] [2021-07-13 20:20:05,644 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 [2021-07-13 20:20:05,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:20:05,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:05,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:20:05,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:06,091 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 [2021-07-13 20:20:06,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:06,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:06,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:20:06,102 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-07-13 20:20:06,142 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:06,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956030909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:06,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:06,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:20:06,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172268987] [2021-07-13 20:20:06,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:20:06,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:06,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:20:06,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:20:06,143 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) [2021-07-13 20:20:06,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:06,389 INFO L93 Difference]: Finished difference Result 1234 states and 5095 transitions. [2021-07-13 20:20:06,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:20:06,389 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 [2021-07-13 20:20:06,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:06,391 INFO L225 Difference]: With dead ends: 1234 [2021-07-13 20:20:06,392 INFO L226 Difference]: Without dead ends: 1207 [2021-07-13 20:20:06,392 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 520.9ms TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:20:06,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2021-07-13 20:20:06,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 959. [2021-07-13 20:20:06,404 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) [2021-07-13 20:20:06,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 4271 transitions. [2021-07-13 20:20:06,406 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 4271 transitions. Word has length 24 [2021-07-13 20:20:06,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:06,406 INFO L482 AbstractCegarLoop]: Abstraction has 959 states and 4271 transitions. [2021-07-13 20:20:06,406 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) [2021-07-13 20:20:06,407 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 4271 transitions. [2021-07-13 20:20:06,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:20:06,408 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:06,408 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:06,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-07-13 20:20:06,613 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:06,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:06,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1798408365, now seen corresponding path program 46 times [2021-07-13 20:20:06,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:06,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030547983] [2021-07-13 20:20:06,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:06,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:06,742 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:06,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:06,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030547983] [2021-07-13 20:20:06,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030547983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:06,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526615210] [2021-07-13 20:20:06,743 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 [2021-07-13 20:20:06,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:20:06,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:06,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:20:06,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:07,346 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:07,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526615210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:07,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:07,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-07-13 20:20:07,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936889391] [2021-07-13 20:20:07,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:20:07,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:07,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:20:07,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:20:07,347 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) [2021-07-13 20:20:07,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:07,756 INFO L93 Difference]: Finished difference Result 991 states and 4347 transitions. [2021-07-13 20:20:07,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:20:07,756 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 [2021-07-13 20:20:07,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:07,758 INFO L225 Difference]: With dead ends: 991 [2021-07-13 20:20:07,758 INFO L226 Difference]: Without dead ends: 987 [2021-07-13 20:20:07,758 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 749.2ms TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:20:07,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2021-07-13 20:20:07,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 959. [2021-07-13 20:20:07,769 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) [2021-07-13 20:20:07,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 4263 transitions. [2021-07-13 20:20:07,771 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 4263 transitions. Word has length 24 [2021-07-13 20:20:07,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:07,771 INFO L482 AbstractCegarLoop]: Abstraction has 959 states and 4263 transitions. [2021-07-13 20:20:07,771 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) [2021-07-13 20:20:07,771 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 4263 transitions. [2021-07-13 20:20:07,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:20:07,773 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:07,773 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:07,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-07-13 20:20:07,973 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:07,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:07,974 INFO L82 PathProgramCache]: Analyzing trace with hash 2054881064, now seen corresponding path program 23 times [2021-07-13 20:20:07,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:07,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316663221] [2021-07-13 20:20:07,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:07,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:08,053 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:20:08,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:08,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316663221] [2021-07-13 20:20:08,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316663221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:08,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166851680] [2021-07-13 20:20:08,053 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 [2021-07-13 20:20:08,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:20:08,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:08,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:20:08,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:08,342 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 [2021-07-13 20:20:08,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:08,346 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 20:20:08,347 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:08,372 INFO L628 ElimStorePlain]: treesize reduction 7, result has 85.7 percent of original size [2021-07-13 20:20:08,373 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. [2021-07-13 20:20:08,373 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:115, output treesize:42 [2021-07-13 20:20:08,418 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:20:08,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166851680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:08,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:08,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-07-13 20:20:08,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347851951] [2021-07-13 20:20:08,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:20:08,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:08,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:20:08,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:20:08,419 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) [2021-07-13 20:20:08,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:08,521 INFO L93 Difference]: Finished difference Result 920 states and 3669 transitions. [2021-07-13 20:20:08,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:20:08,521 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 [2021-07-13 20:20:08,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:08,523 INFO L225 Difference]: With dead ends: 920 [2021-07-13 20:20:08,523 INFO L226 Difference]: Without dead ends: 892 [2021-07-13 20:20:08,523 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 289.7ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:20:08,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2021-07-13 20:20:08,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 763. [2021-07-13 20:20:08,533 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) [2021-07-13 20:20:08,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 3216 transitions. [2021-07-13 20:20:08,534 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 3216 transitions. Word has length 25 [2021-07-13 20:20:08,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:08,534 INFO L482 AbstractCegarLoop]: Abstraction has 763 states and 3216 transitions. [2021-07-13 20:20:08,535 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) [2021-07-13 20:20:08,535 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 3216 transitions. [2021-07-13 20:20:08,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:20:08,536 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:08,536 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:08,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:08,737 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:08,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:08,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1538598462, now seen corresponding path program 47 times [2021-07-13 20:20:08,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:08,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416916348] [2021-07-13 20:20:08,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:08,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:08,808 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:20:08,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:08,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416916348] [2021-07-13 20:20:08,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416916348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:08,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691364562] [2021-07-13 20:20:08,808 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 [2021-07-13 20:20:08,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:20:08,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:08,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 20:20:08,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:08,993 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 [2021-07-13 20:20:08,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:08,998 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 [2021-07-13 20:20:08,999 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:09,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:09,037 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. [2021-07-13 20:20:09,038 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:109, output treesize:95 [2021-07-13 20:20:11,328 WARN L205 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-07-13 20:20:11,444 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:20:11,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691364562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:11,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:11,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-07-13 20:20:11,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220787815] [2021-07-13 20:20:11,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:20:11,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:11,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:20:11,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:20:11,445 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) [2021-07-13 20:20:11,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:11,618 INFO L93 Difference]: Finished difference Result 1219 states and 4777 transitions. [2021-07-13 20:20:11,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:20:11,619 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 [2021-07-13 20:20:11,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:11,621 INFO L225 Difference]: With dead ends: 1219 [2021-07-13 20:20:11,621 INFO L226 Difference]: Without dead ends: 1159 [2021-07-13 20:20:11,621 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 2445.6ms TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:20:11,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-07-13 20:20:11,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 766. [2021-07-13 20:20:11,632 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) [2021-07-13 20:20:11,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 3216 transitions. [2021-07-13 20:20:11,634 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 3216 transitions. Word has length 25 [2021-07-13 20:20:11,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:11,634 INFO L482 AbstractCegarLoop]: Abstraction has 766 states and 3216 transitions. [2021-07-13 20:20:11,634 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) [2021-07-13 20:20:11,634 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 3216 transitions. [2021-07-13 20:20:11,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:20:11,636 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:11,636 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:11,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-07-13 20:20:11,836 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:11,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:11,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1293460578, now seen corresponding path program 48 times [2021-07-13 20:20:11,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:11,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689706008] [2021-07-13 20:20:11,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:11,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:12,030 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:12,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:12,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689706008] [2021-07-13 20:20:12,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689706008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:12,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078931550] [2021-07-13 20:20:12,031 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 [2021-07-13 20:20:12,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:20:12,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:12,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:20:12,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:12,473 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:12,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078931550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:12,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:12,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 20:20:12,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565801641] [2021-07-13 20:20:12,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:20:12,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:12,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:20:12,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:20:12,474 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) [2021-07-13 20:20:12,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:12,784 INFO L93 Difference]: Finished difference Result 817 states and 3362 transitions. [2021-07-13 20:20:12,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:20:12,785 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 [2021-07-13 20:20:12,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:12,786 INFO L225 Difference]: With dead ends: 817 [2021-07-13 20:20:12,786 INFO L226 Difference]: Without dead ends: 808 [2021-07-13 20:20:12,787 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 647.5ms TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:20:12,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2021-07-13 20:20:12,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 774. [2021-07-13 20:20:12,795 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) [2021-07-13 20:20:12,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 3236 transitions. [2021-07-13 20:20:12,797 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 3236 transitions. Word has length 25 [2021-07-13 20:20:12,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:12,797 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 3236 transitions. [2021-07-13 20:20:12,797 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) [2021-07-13 20:20:12,797 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 3236 transitions. [2021-07-13 20:20:12,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:20:12,799 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:12,799 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:12,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-07-13 20:20:12,999 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:13,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:13,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1871613760, now seen corresponding path program 49 times [2021-07-13 20:20:13,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:13,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577378305] [2021-07-13 20:20:13,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:13,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:13,084 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:20:13,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:13,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577378305] [2021-07-13 20:20:13,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577378305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:13,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563253668] [2021-07-13 20:20:13,085 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 [2021-07-13 20:20:13,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:13,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:20:13,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:13,390 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 [2021-07-13 20:20:13,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:13,393 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 [2021-07-13 20:20:13,394 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:13,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:13,423 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. [2021-07-13 20:20:13,423 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:81, output treesize:67 [2021-07-13 20:20:13,570 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:20:13,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563253668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:13,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:13,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-07-13 20:20:13,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476888853] [2021-07-13 20:20:13,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:20:13,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:13,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:20:13,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:20:13,571 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) [2021-07-13 20:20:13,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:13,803 INFO L93 Difference]: Finished difference Result 905 states and 3551 transitions. [2021-07-13 20:20:13,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:20:13,804 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 [2021-07-13 20:20:13,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:13,805 INFO L225 Difference]: With dead ends: 905 [2021-07-13 20:20:13,805 INFO L226 Difference]: Without dead ends: 865 [2021-07-13 20:20:13,806 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 395.8ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:20:13,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2021-07-13 20:20:13,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 778. [2021-07-13 20:20:13,815 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) [2021-07-13 20:20:13,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 3244 transitions. [2021-07-13 20:20:13,817 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 3244 transitions. Word has length 25 [2021-07-13 20:20:13,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:13,817 INFO L482 AbstractCegarLoop]: Abstraction has 778 states and 3244 transitions. [2021-07-13 20:20:13,817 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) [2021-07-13 20:20:13,817 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 3244 transitions. [2021-07-13 20:20:13,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:20:13,819 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:13,819 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:14,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:14,025 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:14,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:14,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1099408196, now seen corresponding path program 50 times [2021-07-13 20:20:14,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:14,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689152062] [2021-07-13 20:20:14,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:14,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:14,203 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:14,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:14,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689152062] [2021-07-13 20:20:14,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689152062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:14,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434220681] [2021-07-13 20:20:14,203 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 [2021-07-13 20:20:14,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:20:14,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:14,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:20:14,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:14,855 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:14,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434220681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:14,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:14,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 20:20:14,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288452831] [2021-07-13 20:20:14,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:20:14,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:14,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:20:14,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:20:14,856 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) [2021-07-13 20:20:15,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:15,289 INFO L93 Difference]: Finished difference Result 825 states and 3382 transitions. [2021-07-13 20:20:15,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:20:15,289 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 [2021-07-13 20:20:15,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:15,291 INFO L225 Difference]: With dead ends: 825 [2021-07-13 20:20:15,291 INFO L226 Difference]: Without dead ends: 816 [2021-07-13 20:20:15,291 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 898.6ms TimeCoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:20:15,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2021-07-13 20:20:15,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 786. [2021-07-13 20:20:15,300 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) [2021-07-13 20:20:15,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 3264 transitions. [2021-07-13 20:20:15,302 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 3264 transitions. Word has length 25 [2021-07-13 20:20:15,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:15,302 INFO L482 AbstractCegarLoop]: Abstraction has 786 states and 3264 transitions. [2021-07-13 20:20:15,302 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) [2021-07-13 20:20:15,302 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 3264 transitions. [2021-07-13 20:20:15,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:20:15,303 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:15,303 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:15,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:15,504 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:15,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:15,504 INFO L82 PathProgramCache]: Analyzing trace with hash 213609916, now seen corresponding path program 51 times [2021-07-13 20:20:15,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:15,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646388255] [2021-07-13 20:20:15,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:15,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:15,741 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:15,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:15,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646388255] [2021-07-13 20:20:15,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646388255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:15,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733354280] [2021-07-13 20:20:15,741 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 [2021-07-13 20:20:15,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:20:15,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:15,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:20:15,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:16,430 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:16,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733354280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:16,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:16,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 20:20:16,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343271928] [2021-07-13 20:20:16,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:20:16,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:16,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:20:16,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:20:16,431 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) [2021-07-13 20:20:16,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:16,912 INFO L93 Difference]: Finished difference Result 833 states and 3402 transitions. [2021-07-13 20:20:16,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:20:16,913 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 [2021-07-13 20:20:16,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:16,914 INFO L225 Difference]: With dead ends: 833 [2021-07-13 20:20:16,914 INFO L226 Difference]: Without dead ends: 824 [2021-07-13 20:20:16,915 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1010.3ms TimeCoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:20:16,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2021-07-13 20:20:16,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 786. [2021-07-13 20:20:16,923 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) [2021-07-13 20:20:16,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 3264 transitions. [2021-07-13 20:20:16,925 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 3264 transitions. Word has length 25 [2021-07-13 20:20:16,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:16,925 INFO L482 AbstractCegarLoop]: Abstraction has 786 states and 3264 transitions. [2021-07-13 20:20:16,925 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) [2021-07-13 20:20:16,925 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 3264 transitions. [2021-07-13 20:20:16,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:20:16,926 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:16,926 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:17,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-07-13 20:20:17,127 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:17,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:17,127 INFO L82 PathProgramCache]: Analyzing trace with hash 616680640, now seen corresponding path program 52 times [2021-07-13 20:20:17,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:17,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422384262] [2021-07-13 20:20:17,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:17,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:17,295 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:17,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:17,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422384262] [2021-07-13 20:20:17,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422384262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:17,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648732733] [2021-07-13 20:20:17,296 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 [2021-07-13 20:20:17,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:20:17,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:17,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:20:17,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:17,655 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:17,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648732733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:17,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:17,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 20:20:17,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915743620] [2021-07-13 20:20:17,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:20:17,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:17,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:20:17,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:20:17,656 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) [2021-07-13 20:20:17,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:17,902 INFO L93 Difference]: Finished difference Result 860 states and 3503 transitions. [2021-07-13 20:20:17,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:20:17,903 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 [2021-07-13 20:20:17,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:17,904 INFO L225 Difference]: With dead ends: 860 [2021-07-13 20:20:17,904 INFO L226 Difference]: Without dead ends: 846 [2021-07-13 20:20:17,905 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 517.8ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:20:17,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2021-07-13 20:20:17,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 803. [2021-07-13 20:20:17,913 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) [2021-07-13 20:20:17,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 3320 transitions. [2021-07-13 20:20:17,915 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 3320 transitions. Word has length 25 [2021-07-13 20:20:17,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:17,915 INFO L482 AbstractCegarLoop]: Abstraction has 803 states and 3320 transitions. [2021-07-13 20:20:17,915 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) [2021-07-13 20:20:17,915 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 3320 transitions. [2021-07-13 20:20:17,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:20:17,917 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:17,917 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:18,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:18,117 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:18,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:18,118 INFO L82 PathProgramCache]: Analyzing trace with hash -691603366, now seen corresponding path program 53 times [2021-07-13 20:20:18,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:18,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413724349] [2021-07-13 20:20:18,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:18,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:18,265 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:18,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:18,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413724349] [2021-07-13 20:20:18,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413724349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:18,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369133049] [2021-07-13 20:20:18,265 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 [2021-07-13 20:20:18,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:20:18,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:18,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:20:18,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:18,760 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:18,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369133049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:18,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:18,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 20:20:18,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064754481] [2021-07-13 20:20:18,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:20:18,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:18,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:20:18,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:20:18,761 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) [2021-07-13 20:20:18,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:18,906 INFO L93 Difference]: Finished difference Result 846 states and 3446 transitions. [2021-07-13 20:20:18,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:20:18,906 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 [2021-07-13 20:20:18,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:18,908 INFO L225 Difference]: With dead ends: 846 [2021-07-13 20:20:18,908 INFO L226 Difference]: Without dead ends: 837 [2021-07-13 20:20:18,908 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 489.9ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:20:18,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2021-07-13 20:20:18,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 799. [2021-07-13 20:20:18,917 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) [2021-07-13 20:20:18,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 3308 transitions. [2021-07-13 20:20:18,919 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 3308 transitions. Word has length 25 [2021-07-13 20:20:18,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:18,919 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 3308 transitions. [2021-07-13 20:20:18,919 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) [2021-07-13 20:20:18,919 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 3308 transitions. [2021-07-13 20:20:18,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:20:18,920 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:18,920 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:19,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:19,121 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:19,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:19,121 INFO L82 PathProgramCache]: Analyzing trace with hash 905805466, now seen corresponding path program 54 times [2021-07-13 20:20:19,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:19,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599740331] [2021-07-13 20:20:19,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:19,185 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:20:19,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:19,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599740331] [2021-07-13 20:20:19,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599740331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:19,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618589133] [2021-07-13 20:20:19,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:20:19,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:20:19,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:19,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:20:19,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:19,417 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 [2021-07-13 20:20:19,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:19,421 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 [2021-07-13 20:20:19,422 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:19,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:19,459 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. [2021-07-13 20:20:19,460 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:105, output treesize:91 [2021-07-13 20:20:19,659 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:20:19,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618589133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:19,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:19,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-07-13 20:20:19,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031519301] [2021-07-13 20:20:19,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:20:19,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:19,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:20:19,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:20:19,660 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) [2021-07-13 20:20:19,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:19,924 INFO L93 Difference]: Finished difference Result 858 states and 3412 transitions. [2021-07-13 20:20:19,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:20:19,924 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 [2021-07-13 20:20:19,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:19,926 INFO L225 Difference]: With dead ends: 858 [2021-07-13 20:20:19,926 INFO L226 Difference]: Without dead ends: 826 [2021-07-13 20:20:19,926 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 411.4ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:20:19,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-07-13 20:20:19,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 791. [2021-07-13 20:20:19,943 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) [2021-07-13 20:20:19,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 3248 transitions. [2021-07-13 20:20:19,944 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 3248 transitions. Word has length 25 [2021-07-13 20:20:19,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:19,945 INFO L482 AbstractCegarLoop]: Abstraction has 791 states and 3248 transitions. [2021-07-13 20:20:19,945 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) [2021-07-13 20:20:19,945 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 3248 transitions. [2021-07-13 20:20:19,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:20:19,946 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:19,946 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:20,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-07-13 20:20:20,146 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:20,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:20,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1044989208, now seen corresponding path program 55 times [2021-07-13 20:20:20,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:20,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969185194] [2021-07-13 20:20:20,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:20,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:20,298 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:20,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:20,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969185194] [2021-07-13 20:20:20,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969185194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:20,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203181408] [2021-07-13 20:20:20,299 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 [2021-07-13 20:20:20,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:20,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:20:20,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:20,802 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:20,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203181408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:20,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:20,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 20:20:20,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293534646] [2021-07-13 20:20:20,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:20:20,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:20,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:20:20,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:20:20,803 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) [2021-07-13 20:20:21,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:21,080 INFO L93 Difference]: Finished difference Result 834 states and 3374 transitions. [2021-07-13 20:20:21,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:20:21,081 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 [2021-07-13 20:20:21,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:21,082 INFO L225 Difference]: With dead ends: 834 [2021-07-13 20:20:21,082 INFO L226 Difference]: Without dead ends: 825 [2021-07-13 20:20:21,083 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 635.0ms TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:20:21,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-07-13 20:20:21,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 803. [2021-07-13 20:20:21,092 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) [2021-07-13 20:20:21,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 3291 transitions. [2021-07-13 20:20:21,094 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 3291 transitions. Word has length 25 [2021-07-13 20:20:21,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:21,094 INFO L482 AbstractCegarLoop]: Abstraction has 803 states and 3291 transitions. [2021-07-13 20:20:21,094 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) [2021-07-13 20:20:21,094 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 3291 transitions. [2021-07-13 20:20:21,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:20:21,096 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:21,096 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:21,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:21,296 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:21,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:21,296 INFO L82 PathProgramCache]: Analyzing trace with hash 200017756, now seen corresponding path program 56 times [2021-07-13 20:20:21,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:21,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038228738] [2021-07-13 20:20:21,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:21,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:21,447 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:21,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:21,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038228738] [2021-07-13 20:20:21,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038228738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:21,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133119013] [2021-07-13 20:20:21,448 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 [2021-07-13 20:20:21,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:20:21,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:21,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:20:21,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:21,977 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:21,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133119013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:21,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:21,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 20:20:21,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829669670] [2021-07-13 20:20:21,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:20:21,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:21,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:20:21,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:20:21,978 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) [2021-07-13 20:20:22,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:22,257 INFO L93 Difference]: Finished difference Result 842 states and 3405 transitions. [2021-07-13 20:20:22,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:20:22,257 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 [2021-07-13 20:20:22,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:22,259 INFO L225 Difference]: With dead ends: 842 [2021-07-13 20:20:22,259 INFO L226 Difference]: Without dead ends: 833 [2021-07-13 20:20:22,259 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 647.7ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:20:22,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2021-07-13 20:20:22,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 799. [2021-07-13 20:20:22,270 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) [2021-07-13 20:20:22,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 3279 transitions. [2021-07-13 20:20:22,272 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 3279 transitions. Word has length 25 [2021-07-13 20:20:22,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:22,272 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 3279 transitions. [2021-07-13 20:20:22,272 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) [2021-07-13 20:20:22,272 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 3279 transitions. [2021-07-13 20:20:22,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:20:22,274 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:22,274 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:22,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:22,480 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:22,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:22,480 INFO L82 PathProgramCache]: Analyzing trace with hash 875475964, now seen corresponding path program 57 times [2021-07-13 20:20:22,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:22,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274813229] [2021-07-13 20:20:22,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:22,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:22,617 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:22,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:22,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274813229] [2021-07-13 20:20:22,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274813229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:22,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409443663] [2021-07-13 20:20:22,618 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 [2021-07-13 20:20:22,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:20:22,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:22,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:20:22,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:23,143 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:23,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409443663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:23,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:23,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 20:20:23,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350259751] [2021-07-13 20:20:23,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:20:23,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:23,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:20:23,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:20:23,144 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) [2021-07-13 20:20:23,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:23,500 INFO L93 Difference]: Finished difference Result 838 states and 3397 transitions. [2021-07-13 20:20:23,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:20:23,501 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 [2021-07-13 20:20:23,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:23,502 INFO L225 Difference]: With dead ends: 838 [2021-07-13 20:20:23,502 INFO L226 Difference]: Without dead ends: 829 [2021-07-13 20:20:23,503 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 696.8ms TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:20:23,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2021-07-13 20:20:23,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 791. [2021-07-13 20:20:23,511 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) [2021-07-13 20:20:23,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 3259 transitions. [2021-07-13 20:20:23,513 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 3259 transitions. Word has length 25 [2021-07-13 20:20:23,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:23,513 INFO L482 AbstractCegarLoop]: Abstraction has 791 states and 3259 transitions. [2021-07-13 20:20:23,513 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) [2021-07-13 20:20:23,513 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 3259 transitions. [2021-07-13 20:20:23,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:20:23,515 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:23,515 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:23,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-07-13 20:20:23,715 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:23,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:23,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1303784532, now seen corresponding path program 58 times [2021-07-13 20:20:23,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:23,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600632749] [2021-07-13 20:20:23,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:23,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:23,939 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:23,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:23,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600632749] [2021-07-13 20:20:23,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600632749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:23,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524248152] [2021-07-13 20:20:23,939 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 [2021-07-13 20:20:23,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:20:23,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:23,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:20:23,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:24,331 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:24,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524248152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:24,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:24,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 20:20:24,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634336524] [2021-07-13 20:20:24,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:20:24,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:24,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:20:24,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:20:24,332 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) [2021-07-13 20:20:24,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:24,607 INFO L93 Difference]: Finished difference Result 828 states and 3368 transitions. [2021-07-13 20:20:24,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:20:24,607 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 [2021-07-13 20:20:24,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:24,609 INFO L225 Difference]: With dead ends: 828 [2021-07-13 20:20:24,609 INFO L226 Difference]: Without dead ends: 819 [2021-07-13 20:20:24,610 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 604.5ms TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:20:24,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2021-07-13 20:20:24,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 785. [2021-07-13 20:20:24,619 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) [2021-07-13 20:20:24,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 3242 transitions. [2021-07-13 20:20:24,621 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 3242 transitions. Word has length 25 [2021-07-13 20:20:24,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:24,621 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 3242 transitions. [2021-07-13 20:20:24,621 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) [2021-07-13 20:20:24,621 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 3242 transitions. [2021-07-13 20:20:24,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:20:24,622 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:24,622 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:24,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:24,839 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:24,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:24,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1856262014, now seen corresponding path program 59 times [2021-07-13 20:20:24,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:24,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542037526] [2021-07-13 20:20:24,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:24,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:24,920 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:24,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:24,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542037526] [2021-07-13 20:20:24,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542037526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:24,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367682689] [2021-07-13 20:20:24,921 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 [2021-07-13 20:20:24,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:20:24,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:24,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:20:24,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:25,114 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 [2021-07-13 20:20:25,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:25,118 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 [2021-07-13 20:20:25,120 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:25,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:25,160 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. [2021-07-13 20:20:25,160 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:105, output treesize:91 [2021-07-13 20:20:25,427 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:20:25,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367682689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:25,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:25,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-07-13 20:20:25,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331429876] [2021-07-13 20:20:25,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:20:25,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:25,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:20:25,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:20:25,428 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) [2021-07-13 20:20:25,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:25,700 INFO L93 Difference]: Finished difference Result 1456 states and 5972 transitions. [2021-07-13 20:20:25,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:20:25,700 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 [2021-07-13 20:20:25,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:25,703 INFO L225 Difference]: With dead ends: 1456 [2021-07-13 20:20:25,703 INFO L226 Difference]: Without dead ends: 1428 [2021-07-13 20:20:25,703 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 455.4ms TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:20:25,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2021-07-13 20:20:25,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1013. [2021-07-13 20:20:25,720 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) [2021-07-13 20:20:25,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 4504 transitions. [2021-07-13 20:20:25,723 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 4504 transitions. Word has length 25 [2021-07-13 20:20:25,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:25,723 INFO L482 AbstractCegarLoop]: Abstraction has 1013 states and 4504 transitions. [2021-07-13 20:20:25,723 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) [2021-07-13 20:20:25,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 4504 transitions. [2021-07-13 20:20:25,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:20:25,725 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:25,725 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:25,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:25,942 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:25,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:25,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1459349340, now seen corresponding path program 60 times [2021-07-13 20:20:25,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:25,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297916534] [2021-07-13 20:20:25,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:25,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:26,158 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:26,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:26,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297916534] [2021-07-13 20:20:26,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297916534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:26,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039707239] [2021-07-13 20:20:26,159 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 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 [2021-07-13 20:20:26,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:20:26,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:26,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:20:26,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:26,670 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:26,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039707239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:26,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:26,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 20:20:26,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438850710] [2021-07-13 20:20:26,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:20:26,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:26,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:20:26,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:20:26,671 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) [2021-07-13 20:20:26,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:26,978 INFO L93 Difference]: Finished difference Result 1046 states and 4594 transitions. [2021-07-13 20:20:26,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:20:26,979 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 [2021-07-13 20:20:26,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:26,981 INFO L225 Difference]: With dead ends: 1046 [2021-07-13 20:20:26,981 INFO L226 Difference]: Without dead ends: 1037 [2021-07-13 20:20:26,981 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 705.8ms TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:20:26,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2021-07-13 20:20:26,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 1020. [2021-07-13 20:20:27,000 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) [2021-07-13 20:20:27,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 4524 transitions. [2021-07-13 20:20:27,003 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 4524 transitions. Word has length 25 [2021-07-13 20:20:27,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:27,003 INFO L482 AbstractCegarLoop]: Abstraction has 1020 states and 4524 transitions. [2021-07-13 20:20:27,003 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) [2021-07-13 20:20:27,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 4524 transitions. [2021-07-13 20:20:27,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:20:27,005 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:27,005 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:27,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-07-13 20:20:27,205 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:27,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:27,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1035038104, now seen corresponding path program 61 times [2021-07-13 20:20:27,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:27,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455613776] [2021-07-13 20:20:27,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:27,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:27,343 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:27,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:27,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455613776] [2021-07-13 20:20:27,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455613776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:27,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695156329] [2021-07-13 20:20:27,343 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 [2021-07-13 20:20:27,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:27,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:20:27,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:27,884 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:27,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695156329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:27,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:27,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 20:20:27,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40815696] [2021-07-13 20:20:27,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:20:27,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:27,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:20:27,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:20:27,885 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) [2021-07-13 20:20:28,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:28,299 INFO L93 Difference]: Finished difference Result 1059 states and 4642 transitions. [2021-07-13 20:20:28,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:20:28,300 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 [2021-07-13 20:20:28,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:28,302 INFO L225 Difference]: With dead ends: 1059 [2021-07-13 20:20:28,302 INFO L226 Difference]: Without dead ends: 1050 [2021-07-13 20:20:28,302 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 787.8ms TimeCoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:20:28,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-07-13 20:20:28,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 1023. [2021-07-13 20:20:28,323 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) [2021-07-13 20:20:28,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 4546 transitions. [2021-07-13 20:20:28,326 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 4546 transitions. Word has length 25 [2021-07-13 20:20:28,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:28,326 INFO L482 AbstractCegarLoop]: Abstraction has 1023 states and 4546 transitions. [2021-07-13 20:20:28,326 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) [2021-07-13 20:20:28,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 4546 transitions. [2021-07-13 20:20:28,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:20:28,328 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:28,328 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:28,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:28,528 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:28,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:28,529 INFO L82 PathProgramCache]: Analyzing trace with hash 190066652, now seen corresponding path program 62 times [2021-07-13 20:20:28,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:28,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155322422] [2021-07-13 20:20:28,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:28,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:28,731 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:28,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:28,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155322422] [2021-07-13 20:20:28,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155322422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:28,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858570500] [2021-07-13 20:20:28,731 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 [2021-07-13 20:20:28,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:20:28,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:28,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:20:28,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:29,342 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:29,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858570500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:29,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:29,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 20:20:29,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375901694] [2021-07-13 20:20:29,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:20:29,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:29,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:20:29,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:20:29,343 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) [2021-07-13 20:20:29,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:29,662 INFO L93 Difference]: Finished difference Result 1064 states and 4663 transitions. [2021-07-13 20:20:29,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:20:29,662 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 [2021-07-13 20:20:29,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:29,664 INFO L225 Difference]: With dead ends: 1064 [2021-07-13 20:20:29,665 INFO L226 Difference]: Without dead ends: 1055 [2021-07-13 20:20:29,665 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 813.5ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:20:29,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2021-07-13 20:20:29,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 1017. [2021-07-13 20:20:29,685 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) [2021-07-13 20:20:29,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 4529 transitions. [2021-07-13 20:20:29,687 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 4529 transitions. Word has length 25 [2021-07-13 20:20:29,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:29,687 INFO L482 AbstractCegarLoop]: Abstraction has 1017 states and 4529 transitions. [2021-07-13 20:20:29,687 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) [2021-07-13 20:20:29,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 4529 transitions. [2021-07-13 20:20:29,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:20:29,689 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:29,689 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:29,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:29,899 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:29,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:29,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1860740126, now seen corresponding path program 63 times [2021-07-13 20:20:29,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:29,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807396993] [2021-07-13 20:20:29,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:29,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:30,056 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:30,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:30,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807396993] [2021-07-13 20:20:30,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807396993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:30,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135599114] [2021-07-13 20:20:30,057 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 [2021-07-13 20:20:30,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:20:30,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:30,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:20:30,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:30,668 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:30,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135599114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:30,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:30,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 20:20:30,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632489789] [2021-07-13 20:20:30,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:20:30,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:30,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:20:30,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:20:30,669 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) [2021-07-13 20:20:31,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:31,204 INFO L93 Difference]: Finished difference Result 1054 states and 4614 transitions. [2021-07-13 20:20:31,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:20:31,204 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 [2021-07-13 20:20:31,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:31,206 INFO L225 Difference]: With dead ends: 1054 [2021-07-13 20:20:31,206 INFO L226 Difference]: Without dead ends: 1041 [2021-07-13 20:20:31,206 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 956.1ms TimeCoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:20:31,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2021-07-13 20:20:31,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 1011. [2021-07-13 20:20:31,218 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) [2021-07-13 20:20:31,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 4506 transitions. [2021-07-13 20:20:31,221 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 4506 transitions. Word has length 25 [2021-07-13 20:20:31,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:31,221 INFO L482 AbstractCegarLoop]: Abstraction has 1011 states and 4506 transitions. [2021-07-13 20:20:31,221 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) [2021-07-13 20:20:31,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 4506 transitions. [2021-07-13 20:20:31,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:20:31,222 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:31,222 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:31,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-07-13 20:20:31,423 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:31,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:31,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1856073988, now seen corresponding path program 64 times [2021-07-13 20:20:31,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:31,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566452291] [2021-07-13 20:20:31,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:31,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:31,538 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:20:31,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:31,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566452291] [2021-07-13 20:20:31,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566452291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:31,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295759296] [2021-07-13 20:20:31,538 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 [2021-07-13 20:20:31,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:20:31,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:31,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:20:31,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:31,699 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 [2021-07-13 20:20:31,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:31,703 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 [2021-07-13 20:20:31,704 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:31,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:31,729 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. [2021-07-13 20:20:31,729 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:81, output treesize:67 [2021-07-13 20:20:31,873 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:20:31,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295759296] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:31,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:31,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2021-07-13 20:20:31,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279564789] [2021-07-13 20:20:31,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:20:31,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:31,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:20:31,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:20:31,874 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) [2021-07-13 20:20:32,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:32,166 INFO L93 Difference]: Finished difference Result 1144 states and 4731 transitions. [2021-07-13 20:20:32,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:20:32,166 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 [2021-07-13 20:20:32,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:32,169 INFO L225 Difference]: With dead ends: 1144 [2021-07-13 20:20:32,169 INFO L226 Difference]: Without dead ends: 1094 [2021-07-13 20:20:32,169 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 464.3ms TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:20:32,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2021-07-13 20:20:32,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 976. [2021-07-13 20:20:32,180 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) [2021-07-13 20:20:32,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 4330 transitions. [2021-07-13 20:20:32,183 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 4330 transitions. Word has length 25 [2021-07-13 20:20:32,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:32,183 INFO L482 AbstractCegarLoop]: Abstraction has 976 states and 4330 transitions. [2021-07-13 20:20:32,183 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) [2021-07-13 20:20:32,183 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 4330 transitions. [2021-07-13 20:20:32,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:20:32,186 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:32,186 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:32,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2021-07-13 20:20:32,386 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:32,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:32,386 INFO L82 PathProgramCache]: Analyzing trace with hash 532128648, now seen corresponding path program 65 times [2021-07-13 20:20:32,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:32,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435689951] [2021-07-13 20:20:32,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:32,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:32,594 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:32,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:32,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435689951] [2021-07-13 20:20:32,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435689951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:32,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853772837] [2021-07-13 20:20:32,595 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 [2021-07-13 20:20:32,639 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:20:32,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:32,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:20:32,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:33,184 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:33,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853772837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:33,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:33,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 20:20:33,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395485073] [2021-07-13 20:20:33,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:20:33,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:33,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:20:33,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:20:33,185 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) [2021-07-13 20:20:33,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:33,718 INFO L93 Difference]: Finished difference Result 1033 states and 4491 transitions. [2021-07-13 20:20:33,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:20:33,718 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 [2021-07-13 20:20:33,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:33,720 INFO L225 Difference]: With dead ends: 1033 [2021-07-13 20:20:33,720 INFO L226 Difference]: Without dead ends: 1024 [2021-07-13 20:20:33,721 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 940.8ms TimeCoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:20:33,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2021-07-13 20:20:33,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 980. [2021-07-13 20:20:33,732 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) [2021-07-13 20:20:33,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 4342 transitions. [2021-07-13 20:20:33,744 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 4342 transitions. Word has length 25 [2021-07-13 20:20:33,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:33,744 INFO L482 AbstractCegarLoop]: Abstraction has 980 states and 4342 transitions. [2021-07-13 20:20:33,744 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) [2021-07-13 20:20:33,744 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 4342 transitions. [2021-07-13 20:20:33,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:20:33,746 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:33,746 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:33,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2021-07-13 20:20:33,946 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:33,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:33,947 INFO L82 PathProgramCache]: Analyzing trace with hash -353669632, now seen corresponding path program 66 times [2021-07-13 20:20:33,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:33,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790984640] [2021-07-13 20:20:33,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:33,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:34,080 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:34,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:34,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790984640] [2021-07-13 20:20:34,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790984640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:34,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681553692] [2021-07-13 20:20:34,081 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 [2021-07-13 20:20:34,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:20:34,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:34,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:20:34,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:34,730 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:34,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681553692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:34,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:34,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 20:20:34,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184192534] [2021-07-13 20:20:34,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:20:34,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:34,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:20:34,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:20:34,731 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) [2021-07-13 20:20:35,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:35,043 INFO L93 Difference]: Finished difference Result 1033 states and 4491 transitions. [2021-07-13 20:20:35,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:20:35,043 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 [2021-07-13 20:20:35,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:35,045 INFO L225 Difference]: With dead ends: 1033 [2021-07-13 20:20:35,045 INFO L226 Difference]: Without dead ends: 1024 [2021-07-13 20:20:35,046 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 758.4ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:20:35,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2021-07-13 20:20:35,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 974. [2021-07-13 20:20:35,060 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) [2021-07-13 20:20:35,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 4325 transitions. [2021-07-13 20:20:35,062 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 4325 transitions. Word has length 25 [2021-07-13 20:20:35,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:35,063 INFO L482 AbstractCegarLoop]: Abstraction has 974 states and 4325 transitions. [2021-07-13 20:20:35,063 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) [2021-07-13 20:20:35,063 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 4325 transitions. [2021-07-13 20:20:35,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:20:35,065 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:35,065 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:35,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:35,281 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:35,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:35,281 INFO L82 PathProgramCache]: Analyzing trace with hash 49401092, now seen corresponding path program 67 times [2021-07-13 20:20:35,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:35,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898865928] [2021-07-13 20:20:35,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:35,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:35,467 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:35,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:35,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898865928] [2021-07-13 20:20:35,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898865928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:35,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285357225] [2021-07-13 20:20:35,468 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 [2021-07-13 20:20:35,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:35,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:20:35,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:35,850 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:35,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285357225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:35,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:35,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 20:20:35,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491991825] [2021-07-13 20:20:35,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:20:35,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:35,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:20:35,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:20:35,851 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) [2021-07-13 20:20:36,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:36,189 INFO L93 Difference]: Finished difference Result 1017 states and 4451 transitions. [2021-07-13 20:20:36,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:20:36,190 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 [2021-07-13 20:20:36,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:36,192 INFO L225 Difference]: With dead ends: 1017 [2021-07-13 20:20:36,192 INFO L226 Difference]: Without dead ends: 1008 [2021-07-13 20:20:36,192 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 624.8ms TimeCoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:20:36,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2021-07-13 20:20:36,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 974. [2021-07-13 20:20:36,203 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) [2021-07-13 20:20:36,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 4325 transitions. [2021-07-13 20:20:36,206 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 4325 transitions. Word has length 25 [2021-07-13 20:20:36,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:36,206 INFO L482 AbstractCegarLoop]: Abstraction has 974 states and 4325 transitions. [2021-07-13 20:20:36,206 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) [2021-07-13 20:20:36,206 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 4325 transitions. [2021-07-13 20:20:36,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:20:36,208 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:36,208 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:36,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:36,408 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:36,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:36,409 INFO L82 PathProgramCache]: Analyzing trace with hash -234168990, now seen corresponding path program 68 times [2021-07-13 20:20:36,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:36,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328867747] [2021-07-13 20:20:36,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:36,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:36,477 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:20:36,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:36,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328867747] [2021-07-13 20:20:36,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328867747] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:36,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651017368] [2021-07-13 20:20:36,477 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 [2021-07-13 20:20:36,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:20:36,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:36,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:20:36,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:36,816 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 [2021-07-13 20:20:36,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:36,820 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 [2021-07-13 20:20:36,821 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:36,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:36,862 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. [2021-07-13 20:20:36,863 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:119, output treesize:105 [2021-07-13 20:20:36,990 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:20:36,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651017368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:36,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:36,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-07-13 20:20:36,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396498624] [2021-07-13 20:20:36,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:20:36,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:36,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:20:36,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:20:36,991 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) [2021-07-13 20:20:39,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:39,295 INFO L93 Difference]: Finished difference Result 2052 states and 8564 transitions. [2021-07-13 20:20:39,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:20:39,295 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 [2021-07-13 20:20:39,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:39,299 INFO L225 Difference]: With dead ends: 2052 [2021-07-13 20:20:39,299 INFO L226 Difference]: Without dead ends: 2008 [2021-07-13 20:20:39,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 459.3ms TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:20:39,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2008 states. [2021-07-13 20:20:39,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2008 to 1253. [2021-07-13 20:20:39,319 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) [2021-07-13 20:20:39,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 5803 transitions. [2021-07-13 20:20:39,323 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 5803 transitions. Word has length 25 [2021-07-13 20:20:39,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:39,323 INFO L482 AbstractCegarLoop]: Abstraction has 1253 states and 5803 transitions. [2021-07-13 20:20:39,323 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) [2021-07-13 20:20:39,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 5803 transitions. [2021-07-13 20:20:39,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:20:39,325 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:39,325 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:39,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2021-07-13 20:20:39,525 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:39,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:39,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1258882914, now seen corresponding path program 69 times [2021-07-13 20:20:39,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:39,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224306943] [2021-07-13 20:20:39,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:39,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:39,699 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:39,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:39,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224306943] [2021-07-13 20:20:39,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224306943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:39,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703458956] [2021-07-13 20:20:39,699 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 [2021-07-13 20:20:39,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:20:39,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:39,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:20:39,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:40,225 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:40,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703458956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:40,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:40,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 20:20:40,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542170493] [2021-07-13 20:20:40,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:20:40,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:40,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:20:40,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:20:40,226 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) [2021-07-13 20:20:40,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:40,562 INFO L93 Difference]: Finished difference Result 1300 states and 5927 transitions. [2021-07-13 20:20:40,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:20:40,562 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 [2021-07-13 20:20:40,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:40,565 INFO L225 Difference]: With dead ends: 1300 [2021-07-13 20:20:40,565 INFO L226 Difference]: Without dead ends: 1285 [2021-07-13 20:20:40,565 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 716.4ms TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:20:40,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2021-07-13 20:20:40,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1257. [2021-07-13 20:20:40,580 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) [2021-07-13 20:20:40,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 5815 transitions. [2021-07-13 20:20:40,583 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 5815 transitions. Word has length 25 [2021-07-13 20:20:40,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:40,583 INFO L482 AbstractCegarLoop]: Abstraction has 1257 states and 5815 transitions. [2021-07-13 20:20:40,583 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) [2021-07-13 20:20:40,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 5815 transitions. [2021-07-13 20:20:40,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:20:40,585 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:40,585 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:40,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:40,786 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:40,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:40,786 INFO L82 PathProgramCache]: Analyzing trace with hash 338525918, now seen corresponding path program 70 times [2021-07-13 20:20:40,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:40,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068590266] [2021-07-13 20:20:40,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:40,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:40,866 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:20:40,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:40,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068590266] [2021-07-13 20:20:40,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068590266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:40,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171489827] [2021-07-13 20:20:40,866 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 [2021-07-13 20:20:40,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:20:40,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:40,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 20:20:40,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:41,089 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 [2021-07-13 20:20:41,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:41,093 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 [2021-07-13 20:20:41,094 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:41,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:41,119 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. [2021-07-13 20:20:41,119 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:81, output treesize:67 [2021-07-13 20:20:41,263 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:41,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171489827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:41,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:41,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-07-13 20:20:41,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383618193] [2021-07-13 20:20:41,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:20:41,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:41,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:20:41,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:20:41,264 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) [2021-07-13 20:20:41,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:41,556 INFO L93 Difference]: Finished difference Result 1292 states and 5884 transitions. [2021-07-13 20:20:41,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:20:41,556 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 [2021-07-13 20:20:41,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:41,559 INFO L225 Difference]: With dead ends: 1292 [2021-07-13 20:20:41,559 INFO L226 Difference]: Without dead ends: 1276 [2021-07-13 20:20:41,559 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 484.7ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:20:41,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-07-13 20:20:41,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1251. [2021-07-13 20:20:41,577 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) [2021-07-13 20:20:41,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 5782 transitions. [2021-07-13 20:20:41,580 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 5782 transitions. Word has length 25 [2021-07-13 20:20:41,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:41,580 INFO L482 AbstractCegarLoop]: Abstraction has 1251 states and 5782 transitions. [2021-07-13 20:20:41,580 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) [2021-07-13 20:20:41,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 5782 transitions. [2021-07-13 20:20:41,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:20:41,582 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:41,582 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:41,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2021-07-13 20:20:41,783 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:41,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:41,784 INFO L82 PathProgramCache]: Analyzing trace with hash 477709660, now seen corresponding path program 71 times [2021-07-13 20:20:41,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:41,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256421844] [2021-07-13 20:20:41,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:41,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:41,965 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:41,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:41,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256421844] [2021-07-13 20:20:41,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256421844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:41,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162635249] [2021-07-13 20:20:41,965 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 [2021-07-13 20:20:42,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 20:20:42,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:42,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:20:42,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:42,453 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:42,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162635249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:42,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:42,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 20:20:42,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882145613] [2021-07-13 20:20:42,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:20:42,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:42,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:20:42,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:20:42,454 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) [2021-07-13 20:20:42,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:42,778 INFO L93 Difference]: Finished difference Result 1290 states and 5886 transitions. [2021-07-13 20:20:42,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:20:42,778 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 [2021-07-13 20:20:42,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:42,781 INFO L225 Difference]: With dead ends: 1290 [2021-07-13 20:20:42,781 INFO L226 Difference]: Without dead ends: 1275 [2021-07-13 20:20:42,781 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 673.1ms TimeCoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:20:42,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-07-13 20:20:42,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1249. [2021-07-13 20:20:42,796 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) [2021-07-13 20:20:42,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 5779 transitions. [2021-07-13 20:20:42,799 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 5779 transitions. Word has length 25 [2021-07-13 20:20:42,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:42,799 INFO L482 AbstractCegarLoop]: Abstraction has 1249 states and 5779 transitions. [2021-07-13 20:20:42,799 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) [2021-07-13 20:20:42,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 5779 transitions. [2021-07-13 20:20:42,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:20:42,801 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:42,801 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:43,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:43,002 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:43,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:43,002 INFO L82 PathProgramCache]: Analyzing trace with hash -367261792, now seen corresponding path program 72 times [2021-07-13 20:20:43,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:43,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015059748] [2021-07-13 20:20:43,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:43,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:43,138 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:43,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:43,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015059748] [2021-07-13 20:20:43,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015059748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:43,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478425698] [2021-07-13 20:20:43,138 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 [2021-07-13 20:20:43,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:20:43,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:43,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:20:43,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:43,709 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:43,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478425698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:43,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:43,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 20:20:43,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605087225] [2021-07-13 20:20:43,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:20:43,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:43,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:20:43,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:20:43,711 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) [2021-07-13 20:20:44,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:44,060 INFO L93 Difference]: Finished difference Result 1291 states and 5884 transitions. [2021-07-13 20:20:44,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:20:44,060 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 [2021-07-13 20:20:44,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:44,063 INFO L225 Difference]: With dead ends: 1291 [2021-07-13 20:20:44,063 INFO L226 Difference]: Without dead ends: 1276 [2021-07-13 20:20:44,063 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 714.7ms TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:20:44,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-07-13 20:20:44,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1240. [2021-07-13 20:20:44,077 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) [2021-07-13 20:20:44,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 5752 transitions. [2021-07-13 20:20:44,081 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 5752 transitions. Word has length 25 [2021-07-13 20:20:44,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:44,081 INFO L482 AbstractCegarLoop]: Abstraction has 1240 states and 5752 transitions. [2021-07-13 20:20:44,081 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) [2021-07-13 20:20:44,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 5752 transitions. [2021-07-13 20:20:44,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:20:44,083 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:44,083 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:44,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable339 [2021-07-13 20:20:44,283 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:44,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:44,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1601944802, now seen corresponding path program 73 times [2021-07-13 20:20:44,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:44,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702839839] [2021-07-13 20:20:44,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:44,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:44,422 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:44,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:44,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702839839] [2021-07-13 20:20:44,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702839839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:44,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042451493] [2021-07-13 20:20:44,423 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 [2021-07-13 20:20:44,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:44,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:20:44,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:44,985 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:44,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042451493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:44,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:44,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 20:20:44,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988207497] [2021-07-13 20:20:44,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:20:44,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:44,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:20:44,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:20:44,986 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) [2021-07-13 20:20:45,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:45,544 INFO L93 Difference]: Finished difference Result 1276 states and 5860 transitions. [2021-07-13 20:20:45,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:20:45,544 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 [2021-07-13 20:20:45,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:45,547 INFO L225 Difference]: With dead ends: 1276 [2021-07-13 20:20:45,547 INFO L226 Difference]: Without dead ends: 1267 [2021-07-13 20:20:45,547 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 905.9ms TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:20:45,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-07-13 20:20:45,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1229. [2021-07-13 20:20:45,563 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) [2021-07-13 20:20:45,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 5726 transitions. [2021-07-13 20:20:45,566 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 5726 transitions. Word has length 25 [2021-07-13 20:20:45,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:45,566 INFO L482 AbstractCegarLoop]: Abstraction has 1229 states and 5726 transitions. [2021-07-13 20:20:45,566 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) [2021-07-13 20:20:45,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 5726 transitions. [2021-07-13 20:20:45,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:20:45,569 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:45,569 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:45,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-07-13 20:20:45,771 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:45,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:45,771 INFO L82 PathProgramCache]: Analyzing trace with hash 790923972, now seen corresponding path program 74 times [2021-07-13 20:20:45,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:45,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274355729] [2021-07-13 20:20:45,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:45,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:45,922 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:45,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:45,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274355729] [2021-07-13 20:20:45,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274355729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:45,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953887928] [2021-07-13 20:20:45,923 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 [2021-07-13 20:20:45,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:20:45,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:45,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:20:45,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:46,586 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:46,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953887928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:46,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:46,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 20:20:46,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269260233] [2021-07-13 20:20:46,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:20:46,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:46,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:20:46,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:20:46,587 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) [2021-07-13 20:20:47,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:47,053 INFO L93 Difference]: Finished difference Result 1274 states and 5850 transitions. [2021-07-13 20:20:47,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:20:47,053 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 [2021-07-13 20:20:47,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:47,056 INFO L225 Difference]: With dead ends: 1274 [2021-07-13 20:20:47,056 INFO L226 Difference]: Without dead ends: 1265 [2021-07-13 20:20:47,056 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 929.6ms TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:20:47,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2021-07-13 20:20:47,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 1221. [2021-07-13 20:20:47,073 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) [2021-07-13 20:20:47,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 5706 transitions. [2021-07-13 20:20:47,076 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 5706 transitions. Word has length 25 [2021-07-13 20:20:47,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:47,076 INFO L482 AbstractCegarLoop]: Abstraction has 1221 states and 5706 transitions. [2021-07-13 20:20:47,076 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) [2021-07-13 20:20:47,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 5706 transitions. [2021-07-13 20:20:47,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:20:47,078 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:47,078 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:47,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-07-13 20:20:47,283 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:47,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:47,283 INFO L82 PathProgramCache]: Analyzing trace with hash -94874308, now seen corresponding path program 75 times [2021-07-13 20:20:47,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:47,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472673749] [2021-07-13 20:20:47,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:47,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:47,433 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:47,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:47,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472673749] [2021-07-13 20:20:47,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472673749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:47,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482580982] [2021-07-13 20:20:47,433 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 [2021-07-13 20:20:47,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:20:47,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:47,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:20:47,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:48,129 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:48,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482580982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:48,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:48,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 20:20:48,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577372979] [2021-07-13 20:20:48,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:20:48,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:48,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:20:48,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:20:48,130 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) [2021-07-13 20:20:48,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:48,645 INFO L93 Difference]: Finished difference Result 1266 states and 5830 transitions. [2021-07-13 20:20:48,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:20:48,645 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 [2021-07-13 20:20:48,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:48,648 INFO L225 Difference]: With dead ends: 1266 [2021-07-13 20:20:48,648 INFO L226 Difference]: Without dead ends: 1257 [2021-07-13 20:20:48,648 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 982.6ms TimeCoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:20:48,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2021-07-13 20:20:48,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 1203. [2021-07-13 20:20:48,663 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) [2021-07-13 20:20:48,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 5652 transitions. [2021-07-13 20:20:48,666 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 5652 transitions. Word has length 25 [2021-07-13 20:20:48,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:48,667 INFO L482 AbstractCegarLoop]: Abstraction has 1203 states and 5652 transitions. [2021-07-13 20:20:48,667 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) [2021-07-13 20:20:48,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 5652 transitions. [2021-07-13 20:20:48,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:20:48,669 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:48,669 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:48,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable355,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:48,869 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:48,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:48,869 INFO L82 PathProgramCache]: Analyzing trace with hash -945147981, now seen corresponding path program 76 times [2021-07-13 20:20:48,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:48,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385867258] [2021-07-13 20:20:48,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:48,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:49,000 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:49,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:49,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385867258] [2021-07-13 20:20:49,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385867258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:49,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377034762] [2021-07-13 20:20:49,001 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 [2021-07-13 20:20:49,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:20:49,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:49,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:20:49,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:49,257 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 [2021-07-13 20:20:49,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:49,262 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 [2021-07-13 20:20:49,262 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:49,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:49,292 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. [2021-07-13 20:20:49,292 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-07-13 20:20:49,392 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:20:49,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377034762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:49,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:49,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-07-13 20:20:49,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772358775] [2021-07-13 20:20:49,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:20:49,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:49,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:20:49,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:20:49,393 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) [2021-07-13 20:20:49,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:49,697 INFO L93 Difference]: Finished difference Result 1400 states and 6258 transitions. [2021-07-13 20:20:49,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:20:49,698 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 [2021-07-13 20:20:49,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:49,701 INFO L225 Difference]: With dead ends: 1400 [2021-07-13 20:20:49,701 INFO L226 Difference]: Without dead ends: 1391 [2021-07-13 20:20:49,701 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 519.7ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:20:49,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2021-07-13 20:20:49,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 1239. [2021-07-13 20:20:49,718 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) [2021-07-13 20:20:49,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 5789 transitions. [2021-07-13 20:20:49,721 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 5789 transitions. Word has length 26 [2021-07-13 20:20:49,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:49,721 INFO L482 AbstractCegarLoop]: Abstraction has 1239 states and 5789 transitions. [2021-07-13 20:20:49,721 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) [2021-07-13 20:20:49,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 5789 transitions. [2021-07-13 20:20:49,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:20:49,723 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:49,723 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:49,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:49,941 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:49,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:49,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1969861905, now seen corresponding path program 77 times [2021-07-13 20:20:49,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:49,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492552426] [2021-07-13 20:20:49,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:49,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:50,142 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:50,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:50,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492552426] [2021-07-13 20:20:50,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492552426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:50,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186563264] [2021-07-13 20:20:50,143 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 [2021-07-13 20:20:50,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:20:50,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:50,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:20:50,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:50,801 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:50,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186563264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:50,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:50,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-13 20:20:50,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336903216] [2021-07-13 20:20:50,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:20:50,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:50,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:20:50,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:20:50,802 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) [2021-07-13 20:20:51,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:51,046 INFO L93 Difference]: Finished difference Result 1286 states and 5928 transitions. [2021-07-13 20:20:51,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:20:51,047 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 [2021-07-13 20:20:51,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:51,050 INFO L225 Difference]: With dead ends: 1286 [2021-07-13 20:20:51,050 INFO L226 Difference]: Without dead ends: 1278 [2021-07-13 20:20:51,050 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 725.5ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:20:51,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2021-07-13 20:20:51,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 1246. [2021-07-13 20:20:51,065 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) [2021-07-13 20:20:51,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 5820 transitions. [2021-07-13 20:20:51,068 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 5820 transitions. Word has length 26 [2021-07-13 20:20:51,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:51,068 INFO L482 AbstractCegarLoop]: Abstraction has 1246 states and 5820 transitions. [2021-07-13 20:20:51,069 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) [2021-07-13 20:20:51,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 5820 transitions. [2021-07-13 20:20:51,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:20:51,071 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:51,071 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:51,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable365,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:51,272 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:51,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:51,272 INFO L82 PathProgramCache]: Analyzing trace with hash -615589583, now seen corresponding path program 78 times [2021-07-13 20:20:51,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:51,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852685023] [2021-07-13 20:20:51,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:51,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:51,476 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:51,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:51,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852685023] [2021-07-13 20:20:51,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852685023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:51,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268311255] [2021-07-13 20:20:51,477 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 [2021-07-13 20:20:51,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:20:51,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:51,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:20:51,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:51,769 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 [2021-07-13 20:20:51,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:51,773 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 [2021-07-13 20:20:51,774 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:51,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:51,818 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. [2021-07-13 20:20:51,818 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:119, output treesize:105 [2021-07-13 20:20:51,945 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:20:51,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268311255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:51,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:51,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-07-13 20:20:51,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911849451] [2021-07-13 20:20:51,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:20:51,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:51,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:20:51,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:20:51,946 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) [2021-07-13 20:20:52,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:52,470 INFO L93 Difference]: Finished difference Result 1353 states and 6064 transitions. [2021-07-13 20:20:52,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:20:52,470 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 [2021-07-13 20:20:52,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:52,473 INFO L225 Difference]: With dead ends: 1353 [2021-07-13 20:20:52,473 INFO L226 Difference]: Without dead ends: 1341 [2021-07-13 20:20:52,473 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 814.5ms TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:20:52,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2021-07-13 20:20:52,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1247. [2021-07-13 20:20:52,489 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) [2021-07-13 20:20:52,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 5803 transitions. [2021-07-13 20:20:52,492 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 5803 transitions. Word has length 26 [2021-07-13 20:20:52,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:52,493 INFO L482 AbstractCegarLoop]: Abstraction has 1247 states and 5803 transitions. [2021-07-13 20:20:52,493 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) [2021-07-13 20:20:52,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 5803 transitions. [2021-07-13 20:20:52,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:20:52,495 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:52,495 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:52,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:52,695 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:52,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:52,695 INFO L82 PathProgramCache]: Analyzing trace with hash 219339981, now seen corresponding path program 79 times [2021-07-13 20:20:52,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:52,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989876820] [2021-07-13 20:20:52,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:52,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:52,818 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:20:52,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:52,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989876820] [2021-07-13 20:20:52,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989876820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:52,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900120349] [2021-07-13 20:20:52,818 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 [2021-07-13 20:20:52,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:52,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:20:52,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:53,062 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 [2021-07-13 20:20:53,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:53,066 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 [2021-07-13 20:20:53,067 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:53,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:53,096 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. [2021-07-13 20:20:53,096 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-07-13 20:20:53,206 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:20:53,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900120349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:53,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:53,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-07-13 20:20:53,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038929728] [2021-07-13 20:20:53,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:20:53,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:53,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:20:53,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:20:53,207 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) [2021-07-13 20:20:53,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:53,624 INFO L93 Difference]: Finished difference Result 2674 states and 11664 transitions. [2021-07-13 20:20:53,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:20:53,624 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 [2021-07-13 20:20:53,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:53,630 INFO L225 Difference]: With dead ends: 2674 [2021-07-13 20:20:53,630 INFO L226 Difference]: Without dead ends: 2633 [2021-07-13 20:20:53,630 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 607.2ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:20:53,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2633 states. [2021-07-13 20:20:53,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2633 to 1458. [2021-07-13 20:20:53,656 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) [2021-07-13 20:20:53,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 7113 transitions. [2021-07-13 20:20:53,660 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 7113 transitions. Word has length 26 [2021-07-13 20:20:53,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:53,660 INFO L482 AbstractCegarLoop]: Abstraction has 1458 states and 7113 transitions. [2021-07-13 20:20:53,660 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) [2021-07-13 20:20:53,661 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 7113 transitions. [2021-07-13 20:20:53,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:20:53,663 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:53,663 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:53,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable374 [2021-07-13 20:20:53,863 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:53,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:53,864 INFO L82 PathProgramCache]: Analyzing trace with hash -805373943, now seen corresponding path program 80 times [2021-07-13 20:20:53,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:53,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397012824] [2021-07-13 20:20:53,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:53,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:54,058 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:54,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:54,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397012824] [2021-07-13 20:20:54,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397012824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:54,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343517930] [2021-07-13 20:20:54,058 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 [2021-07-13 20:20:54,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:20:54,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:54,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:20:54,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:54,667 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:54,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343517930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:54,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:54,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-13 20:20:54,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873833221] [2021-07-13 20:20:54,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:20:54,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:54,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:20:54,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:20:54,668 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) [2021-07-13 20:20:55,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:55,269 INFO L93 Difference]: Finished difference Result 1507 states and 7259 transitions. [2021-07-13 20:20:55,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:20:55,269 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 [2021-07-13 20:20:55,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:55,273 INFO L225 Difference]: With dead ends: 1507 [2021-07-13 20:20:55,273 INFO L226 Difference]: Without dead ends: 1499 [2021-07-13 20:20:55,273 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 975.5ms TimeCoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:20:55,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1499 states. [2021-07-13 20:20:55,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1499 to 1460. [2021-07-13 20:20:55,292 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) [2021-07-13 20:20:55,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 7128 transitions. [2021-07-13 20:20:55,296 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 7128 transitions. Word has length 26 [2021-07-13 20:20:55,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:55,296 INFO L482 AbstractCegarLoop]: Abstraction has 1460 states and 7128 transitions. [2021-07-13 20:20:55,296 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) [2021-07-13 20:20:55,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 7128 transitions. [2021-07-13 20:20:55,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:20:55,299 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:55,299 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:55,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-07-13 20:20:55,499 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:55,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:55,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1799650449, now seen corresponding path program 81 times [2021-07-13 20:20:55,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:55,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902648400] [2021-07-13 20:20:55,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:55,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:55,643 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:55,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:55,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902648400] [2021-07-13 20:20:55,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902648400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:55,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896450677] [2021-07-13 20:20:55,644 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 [2021-07-13 20:20:55,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:20:55,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:55,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:20:55,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:56,343 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:56,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896450677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:56,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:56,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-13 20:20:56,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537365332] [2021-07-13 20:20:56,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:20:56,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:56,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:20:56,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:20:56,344 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) [2021-07-13 20:20:56,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:56,808 INFO L93 Difference]: Finished difference Result 1520 states and 7319 transitions. [2021-07-13 20:20:56,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:20:56,808 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 [2021-07-13 20:20:56,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:56,811 INFO L225 Difference]: With dead ends: 1520 [2021-07-13 20:20:56,811 INFO L226 Difference]: Without dead ends: 1515 [2021-07-13 20:20:56,812 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 926.5ms TimeCoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:20:56,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-07-13 20:20:56,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1465. [2021-07-13 20:20:56,836 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) [2021-07-13 20:20:56,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 7138 transitions. [2021-07-13 20:20:56,840 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 7138 transitions. Word has length 26 [2021-07-13 20:20:56,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:56,840 INFO L482 AbstractCegarLoop]: Abstraction has 1465 states and 7138 transitions. [2021-07-13 20:20:56,840 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) [2021-07-13 20:20:56,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 7138 transitions. [2021-07-13 20:20:56,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:20:56,842 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:56,842 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:57,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:57,043 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:57,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:57,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1153082439, now seen corresponding path program 82 times [2021-07-13 20:20:57,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:57,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700264864] [2021-07-13 20:20:57,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:57,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:57,121 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:57,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:57,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700264864] [2021-07-13 20:20:57,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700264864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:57,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904111159] [2021-07-13 20:20:57,122 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 [2021-07-13 20:20:57,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:20:57,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:57,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 20:20:57,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:57,378 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 [2021-07-13 20:20:57,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:57,382 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 [2021-07-13 20:20:57,383 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:57,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:57,415 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. [2021-07-13 20:20:57,415 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:95, output treesize:81 [2021-07-13 20:20:57,512 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:57,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904111159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:57,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:57,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-07-13 20:20:57,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812337918] [2021-07-13 20:20:57,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:20:57,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:57,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:20:57,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:20:57,513 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) [2021-07-13 20:21:01,747 WARN L205 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-07-13 20:21:05,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:05,916 INFO L93 Difference]: Finished difference Result 1793 states and 8258 transitions. [2021-07-13 20:21:05,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:21:05,917 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 [2021-07-13 20:21:05,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:05,921 INFO L225 Difference]: With dead ends: 1793 [2021-07-13 20:21:05,921 INFO L226 Difference]: Without dead ends: 1777 [2021-07-13 20:21:05,921 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 4515.2ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:21:05,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2021-07-13 20:21:05,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1513. [2021-07-13 20:21:05,944 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) [2021-07-13 20:21:05,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 7358 transitions. [2021-07-13 20:21:05,948 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 7358 transitions. Word has length 26 [2021-07-13 20:21:05,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:05,949 INFO L482 AbstractCegarLoop]: Abstraction has 1513 states and 7358 transitions. [2021-07-13 20:21:05,949 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) [2021-07-13 20:21:05,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 7358 transitions. [2021-07-13 20:21:05,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:21:05,951 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:05,951 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:06,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-07-13 20:21:06,168 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:06,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:06,168 INFO L82 PathProgramCache]: Analyzing trace with hash 532556407, now seen corresponding path program 83 times [2021-07-13 20:21:06,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:06,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399164375] [2021-07-13 20:21:06,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:06,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:06,287 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:21:06,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:06,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399164375] [2021-07-13 20:21:06,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399164375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:06,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726303416] [2021-07-13 20:21:06,288 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 [2021-07-13 20:21:06,328 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:21:06,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:06,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:21:06,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:06,639 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 [2021-07-13 20:21:06,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:06,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-13 20:21:06,646 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:06,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:06,731 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 [2021-07-13 20:21:06,732 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:06,735 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 [2021-07-13 20:21:06,736 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:06,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:06,824 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. [2021-07-13 20:21:06,824 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:251, output treesize:223 [2021-07-13 20:21:07,084 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:21:07,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726303416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:07,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:07,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-07-13 20:21:07,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109392077] [2021-07-13 20:21:07,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:21:07,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:07,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:21:07,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:21:07,085 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) [2021-07-13 20:21:07,478 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 107 [2021-07-13 20:21:07,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:07,510 INFO L93 Difference]: Finished difference Result 1848 states and 7788 transitions. [2021-07-13 20:21:07,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:21:07,510 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 [2021-07-13 20:21:07,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:07,514 INFO L225 Difference]: With dead ends: 1848 [2021-07-13 20:21:07,514 INFO L226 Difference]: Without dead ends: 1812 [2021-07-13 20:21:07,514 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 653.0ms TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:21:07,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2021-07-13 20:21:07,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1232. [2021-07-13 20:21:07,541 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) [2021-07-13 20:21:07,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 5614 transitions. [2021-07-13 20:21:07,544 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 5614 transitions. Word has length 26 [2021-07-13 20:21:07,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:07,544 INFO L482 AbstractCegarLoop]: Abstraction has 1232 states and 5614 transitions. [2021-07-13 20:21:07,544 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) [2021-07-13 20:21:07,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 5614 transitions. [2021-07-13 20:21:07,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:21:07,546 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:07,546 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:07,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:07,747 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:07,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:07,747 INFO L82 PathProgramCache]: Analyzing trace with hash -492157517, now seen corresponding path program 84 times [2021-07-13 20:21:07,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:07,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222125466] [2021-07-13 20:21:07,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:07,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:07,911 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:07,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:07,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222125466] [2021-07-13 20:21:07,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222125466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:07,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138039873] [2021-07-13 20:21:07,911 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 [2021-07-13 20:21:07,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:21:07,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:07,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:21:07,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:08,413 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:08,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138039873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:08,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:08,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-13 20:21:08,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6631614] [2021-07-13 20:21:08,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:21:08,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:08,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:21:08,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:21:08,414 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) [2021-07-13 20:21:08,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:08,711 INFO L93 Difference]: Finished difference Result 1287 states and 5773 transitions. [2021-07-13 20:21:08,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:21:08,711 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 [2021-07-13 20:21:08,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:08,714 INFO L225 Difference]: With dead ends: 1287 [2021-07-13 20:21:08,715 INFO L226 Difference]: Without dead ends: 1279 [2021-07-13 20:21:08,715 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 650.3ms TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:21:08,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2021-07-13 20:21:08,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1242. [2021-07-13 20:21:08,729 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) [2021-07-13 20:21:08,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 5655 transitions. [2021-07-13 20:21:08,733 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 5655 transitions. Word has length 26 [2021-07-13 20:21:08,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:08,733 INFO L482 AbstractCegarLoop]: Abstraction has 1242 states and 5655 transitions. [2021-07-13 20:21:08,733 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) [2021-07-13 20:21:08,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 5655 transitions. [2021-07-13 20:21:08,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:21:08,735 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:08,735 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:08,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-07-13 20:21:08,937 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:08,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:08,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1587344779, now seen corresponding path program 85 times [2021-07-13 20:21:08,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:08,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322807681] [2021-07-13 20:21:08,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:08,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:09,092 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:09,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:09,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322807681] [2021-07-13 20:21:09,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322807681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:09,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322984627] [2021-07-13 20:21:09,092 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 [2021-07-13 20:21:09,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:09,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:21:09,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:09,337 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 [2021-07-13 20:21:09,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:09,341 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 [2021-07-13 20:21:09,342 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:09,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:09,370 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. [2021-07-13 20:21:09,370 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-07-13 20:21:09,464 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:21:09,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322984627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:09,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:09,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-07-13 20:21:09,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906926251] [2021-07-13 20:21:09,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:21:09,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:09,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:21:09,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:21:09,465 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) [2021-07-13 20:21:09,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:09,853 INFO L93 Difference]: Finished difference Result 1370 states and 6000 transitions. [2021-07-13 20:21:09,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:21:09,853 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 [2021-07-13 20:21:09,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:09,856 INFO L225 Difference]: With dead ends: 1370 [2021-07-13 20:21:09,856 INFO L226 Difference]: Without dead ends: 1358 [2021-07-13 20:21:09,856 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 629.0ms TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:21:09,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2021-07-13 20:21:09,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 1255. [2021-07-13 20:21:09,872 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) [2021-07-13 20:21:09,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 5694 transitions. [2021-07-13 20:21:09,875 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 5694 transitions. Word has length 26 [2021-07-13 20:21:09,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:09,875 INFO L482 AbstractCegarLoop]: Abstraction has 1255 states and 5694 transitions. [2021-07-13 20:21:09,875 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) [2021-07-13 20:21:09,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 5694 transitions. [2021-07-13 20:21:09,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:21:09,877 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:09,878 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:10,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable401,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:10,091 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:10,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:10,091 INFO L82 PathProgramCache]: Analyzing trace with hash 2032815699, now seen corresponding path program 86 times [2021-07-13 20:21:10,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:10,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327646259] [2021-07-13 20:21:10,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:10,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:10,273 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:10,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:10,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327646259] [2021-07-13 20:21:10,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327646259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:10,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834441037] [2021-07-13 20:21:10,274 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 [2021-07-13 20:21:10,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:21:10,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:10,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:21:10,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:10,867 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:10,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834441037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:10,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:10,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-13 20:21:10,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561529705] [2021-07-13 20:21:10,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:21:10,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:10,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:21:10,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:21:10,868 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) [2021-07-13 20:21:11,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:11,185 INFO L93 Difference]: Finished difference Result 1289 states and 5778 transitions. [2021-07-13 20:21:11,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:21:11,186 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 [2021-07-13 20:21:11,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:11,188 INFO L225 Difference]: With dead ends: 1289 [2021-07-13 20:21:11,188 INFO L226 Difference]: Without dead ends: 1277 [2021-07-13 20:21:11,189 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 727.2ms TimeCoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:21:11,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2021-07-13 20:21:11,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 1252. [2021-07-13 20:21:11,203 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) [2021-07-13 20:21:11,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1252 states to 1252 states and 5686 transitions. [2021-07-13 20:21:11,206 INFO L78 Accepts]: Start accepts. Automaton has 1252 states and 5686 transitions. Word has length 26 [2021-07-13 20:21:11,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:11,206 INFO L482 AbstractCegarLoop]: Abstraction has 1252 states and 5686 transitions. [2021-07-13 20:21:11,206 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) [2021-07-13 20:21:11,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1252 states and 5686 transitions. [2021-07-13 20:21:11,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:21:11,208 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:11,208 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:11,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-07-13 20:21:11,409 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:11,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:11,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1608504463, now seen corresponding path program 87 times [2021-07-13 20:21:11,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:11,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946231451] [2021-07-13 20:21:11,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:11,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:11,617 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:11,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:11,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946231451] [2021-07-13 20:21:11,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946231451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:11,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722518108] [2021-07-13 20:21:11,623 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 [2021-07-13 20:21:11,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 20:21:11,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:11,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:21:11,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:12,306 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:12,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722518108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:12,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:12,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-13 20:21:12,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604005862] [2021-07-13 20:21:12,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:21:12,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:12,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:21:12,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:21:12,307 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) [2021-07-13 20:21:12,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:12,650 INFO L93 Difference]: Finished difference Result 1295 states and 5809 transitions. [2021-07-13 20:21:12,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:21:12,651 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 [2021-07-13 20:21:12,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:12,653 INFO L225 Difference]: With dead ends: 1295 [2021-07-13 20:21:12,653 INFO L226 Difference]: Without dead ends: 1287 [2021-07-13 20:21:12,654 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 859.1ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:21:12,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-07-13 20:21:12,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1254. [2021-07-13 20:21:12,668 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) [2021-07-13 20:21:12,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 5698 transitions. [2021-07-13 20:21:12,671 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 5698 transitions. Word has length 26 [2021-07-13 20:21:12,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:12,671 INFO L482 AbstractCegarLoop]: Abstraction has 1254 states and 5698 transitions. [2021-07-13 20:21:12,672 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) [2021-07-13 20:21:12,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 5698 transitions. [2021-07-13 20:21:12,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:21:12,673 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:12,674 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:12,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:12,874 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:12,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:12,874 INFO L82 PathProgramCache]: Analyzing trace with hash 842661457, now seen corresponding path program 88 times [2021-07-13 20:21:12,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:12,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509331255] [2021-07-13 20:21:12,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:12,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:13,052 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:13,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:13,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509331255] [2021-07-13 20:21:13,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509331255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:13,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991408397] [2021-07-13 20:21:13,053 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 [2021-07-13 20:21:13,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:21:13,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:13,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:21:13,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:13,621 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:13,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991408397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:13,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:13,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-13 20:21:13,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518186927] [2021-07-13 20:21:13,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:21:13,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:13,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:21:13,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:21:13,622 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) [2021-07-13 20:21:13,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:13,902 INFO L93 Difference]: Finished difference Result 1301 states and 5846 transitions. [2021-07-13 20:21:13,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:21:13,902 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 [2021-07-13 20:21:13,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:13,904 INFO L225 Difference]: With dead ends: 1301 [2021-07-13 20:21:13,905 INFO L226 Difference]: Without dead ends: 1296 [2021-07-13 20:21:13,905 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 686.3ms TimeCoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:21:13,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2021-07-13 20:21:13,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 1250. [2021-07-13 20:21:13,919 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) [2021-07-13 20:21:13,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 5685 transitions. [2021-07-13 20:21:13,922 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 5685 transitions. Word has length 26 [2021-07-13 20:21:13,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:13,922 INFO L482 AbstractCegarLoop]: Abstraction has 1250 states and 5685 transitions. [2021-07-13 20:21:13,922 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) [2021-07-13 20:21:13,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 5685 transitions. [2021-07-13 20:21:13,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:21:13,924 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:13,924 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:14,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-07-13 20:21:14,124 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:14,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:14,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1059437065, now seen corresponding path program 89 times [2021-07-13 20:21:14,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:14,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914456380] [2021-07-13 20:21:14,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:14,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:14,348 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:14,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:14,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914456380] [2021-07-13 20:21:14,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914456380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:14,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992149948] [2021-07-13 20:21:14,348 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 [2021-07-13 20:21:14,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 20:21:14,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:14,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:21:14,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:14,932 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:14,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992149948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:14,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:14,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-13 20:21:14,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180786219] [2021-07-13 20:21:14,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:21:14,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:14,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:21:14,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:21:14,933 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) [2021-07-13 20:21:15,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:15,212 INFO L93 Difference]: Finished difference Result 1389 states and 6092 transitions. [2021-07-13 20:21:15,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:21:15,212 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 [2021-07-13 20:21:15,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:15,215 INFO L225 Difference]: With dead ends: 1389 [2021-07-13 20:21:15,215 INFO L226 Difference]: Without dead ends: 1381 [2021-07-13 20:21:15,215 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 725.3ms TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:21:15,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2021-07-13 20:21:15,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 1243. [2021-07-13 20:21:15,229 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) [2021-07-13 20:21:15,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 5668 transitions. [2021-07-13 20:21:15,232 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 5668 transitions. Word has length 26 [2021-07-13 20:21:15,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:15,232 INFO L482 AbstractCegarLoop]: Abstraction has 1243 states and 5668 transitions. [2021-07-13 20:21:15,232 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) [2021-07-13 20:21:15,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 5668 transitions. [2021-07-13 20:21:15,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:21:15,234 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:15,234 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:15,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-07-13 20:21:15,434 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:15,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:15,434 INFO L82 PathProgramCache]: Analyzing trace with hash 2140342969, now seen corresponding path program 90 times [2021-07-13 20:21:15,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:15,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729436614] [2021-07-13 20:21:15,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:15,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:15,540 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:15,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:15,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729436614] [2021-07-13 20:21:15,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729436614] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:15,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347982029] [2021-07-13 20:21:15,541 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 [2021-07-13 20:21:15,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:21:15,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:15,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 20:21:15,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:15,978 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 [2021-07-13 20:21:15,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:15,982 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 [2021-07-13 20:21:15,983 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:16,092 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2021-07-13 20:21:16,092 INFO L628 ElimStorePlain]: treesize reduction 14, result has 92.6 percent of original size [2021-07-13 20:21:16,095 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 [2021-07-13 20:21:16,096 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:16,100 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 [2021-07-13 20:21:16,101 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:16,157 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.3 percent of original size [2021-07-13 20:21:16,159 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. [2021-07-13 20:21:16,159 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:203, output treesize:73 [2021-07-13 20:21:16,255 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:16,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347982029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:16,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:16,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-07-13 20:21:16,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026264884] [2021-07-13 20:21:16,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:21:16,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:16,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:21:16,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:21:16,256 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) [2021-07-13 20:21:16,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:16,636 INFO L93 Difference]: Finished difference Result 1300 states and 5767 transitions. [2021-07-13 20:21:16,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:21:16,636 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 [2021-07-13 20:21:16,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:16,639 INFO L225 Difference]: With dead ends: 1300 [2021-07-13 20:21:16,639 INFO L226 Difference]: Without dead ends: 1284 [2021-07-13 20:21:16,639 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 666.9ms TimeCoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:21:16,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2021-07-13 20:21:16,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 1239. [2021-07-13 20:21:16,664 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) [2021-07-13 20:21:16,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 5638 transitions. [2021-07-13 20:21:16,667 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 5638 transitions. Word has length 26 [2021-07-13 20:21:16,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:16,668 INFO L482 AbstractCegarLoop]: Abstraction has 1239 states and 5638 transitions. [2021-07-13 20:21:16,668 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) [2021-07-13 20:21:16,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 5638 transitions. [2021-07-13 20:21:16,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:21:16,669 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:16,670 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:16,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:16,870 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:16,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:16,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1627082575, now seen corresponding path program 91 times [2021-07-13 20:21:16,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:16,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005756374] [2021-07-13 20:21:16,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:16,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:16,988 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:16,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:16,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005756374] [2021-07-13 20:21:16,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005756374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:16,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299980554] [2021-07-13 20:21:16,988 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 [2021-07-13 20:21:17,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:17,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:21:17,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:17,226 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 [2021-07-13 20:21:17,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:17,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-13 20:21:17,231 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:17,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:17,260 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. [2021-07-13 20:21:17,261 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-07-13 20:21:17,351 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:21:17,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299980554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:17,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:17,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-07-13 20:21:17,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687761647] [2021-07-13 20:21:17,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:21:17,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:17,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:21:17,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:21:17,352 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) [2021-07-13 20:21:17,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:17,580 INFO L93 Difference]: Finished difference Result 1002 states and 4294 transitions. [2021-07-13 20:21:17,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:21:17,580 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 [2021-07-13 20:21:17,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:17,582 INFO L225 Difference]: With dead ends: 1002 [2021-07-13 20:21:17,582 INFO L226 Difference]: Without dead ends: 994 [2021-07-13 20:21:17,582 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 471.6ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:21:17,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-07-13 20:21:17,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 974. [2021-07-13 20:21:17,593 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) [2021-07-13 20:21:17,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 4230 transitions. [2021-07-13 20:21:17,595 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 4230 transitions. Word has length 26 [2021-07-13 20:21:17,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:17,595 INFO L482 AbstractCegarLoop]: Abstraction has 974 states and 4230 transitions. [2021-07-13 20:21:17,595 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) [2021-07-13 20:21:17,595 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 4230 transitions. [2021-07-13 20:21:17,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:21:17,597 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:17,597 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:17,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable426,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:17,797 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:17,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:17,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1993077903, now seen corresponding path program 92 times [2021-07-13 20:21:17,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:17,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825033431] [2021-07-13 20:21:17,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:17,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:17,991 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:17,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:17,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825033431] [2021-07-13 20:21:17,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825033431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:17,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742091171] [2021-07-13 20:21:17,992 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 [2021-07-13 20:21:18,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:21:18,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:18,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:21:18,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:18,658 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:18,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742091171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:18,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:18,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-13 20:21:18,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021247912] [2021-07-13 20:21:18,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:21:18,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:18,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:21:18,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:21:18,659 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) [2021-07-13 20:21:19,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:19,277 INFO L93 Difference]: Finished difference Result 1025 states and 4377 transitions. [2021-07-13 20:21:19,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:21:19,277 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 [2021-07-13 20:21:19,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:19,279 INFO L225 Difference]: With dead ends: 1025 [2021-07-13 20:21:19,279 INFO L226 Difference]: Without dead ends: 1017 [2021-07-13 20:21:19,280 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1122.2ms TimeCoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:21:19,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2021-07-13 20:21:19,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 986. [2021-07-13 20:21:19,290 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) [2021-07-13 20:21:19,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 4271 transitions. [2021-07-13 20:21:19,302 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 4271 transitions. Word has length 26 [2021-07-13 20:21:19,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:19,302 INFO L482 AbstractCegarLoop]: Abstraction has 986 states and 4271 transitions. [2021-07-13 20:21:19,302 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) [2021-07-13 20:21:19,302 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 4271 transitions. [2021-07-13 20:21:19,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:21:19,303 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:19,303 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:19,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:19,504 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:19,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:19,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1724331475, now seen corresponding path program 93 times [2021-07-13 20:21:19,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:19,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249349380] [2021-07-13 20:21:19,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:19,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:19,712 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:19,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:19,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249349380] [2021-07-13 20:21:19,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249349380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:19,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510991891] [2021-07-13 20:21:19,712 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 [2021-07-13 20:21:19,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:21:19,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:19,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:21:19,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:20,282 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:20,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510991891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:20,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:20,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-13 20:21:20,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758956257] [2021-07-13 20:21:20,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:21:20,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:20,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:21:20,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:21:20,283 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) [2021-07-13 20:21:20,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:20,640 INFO L93 Difference]: Finished difference Result 1033 states and 4401 transitions. [2021-07-13 20:21:20,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:21:20,640 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 [2021-07-13 20:21:20,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:20,642 INFO L225 Difference]: With dead ends: 1033 [2021-07-13 20:21:20,642 INFO L226 Difference]: Without dead ends: 1025 [2021-07-13 20:21:20,642 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 781.2ms TimeCoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:21:20,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2021-07-13 20:21:20,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 975. [2021-07-13 20:21:20,653 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) [2021-07-13 20:21:20,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 4241 transitions. [2021-07-13 20:21:20,655 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 4241 transitions. Word has length 26 [2021-07-13 20:21:20,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:20,656 INFO L482 AbstractCegarLoop]: Abstraction has 975 states and 4241 transitions. [2021-07-13 20:21:20,656 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) [2021-07-13 20:21:20,656 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 4241 transitions. [2021-07-13 20:21:20,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:21:20,657 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:20,657 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:20,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-07-13 20:21:20,858 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:20,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:20,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1300020239, now seen corresponding path program 94 times [2021-07-13 20:21:20,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:20,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476382606] [2021-07-13 20:21:20,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:20,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:21,052 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:21,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:21,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476382606] [2021-07-13 20:21:21,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476382606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:21,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942671359] [2021-07-13 20:21:21,052 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 [2021-07-13 20:21:21,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:21:21,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:21,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:21:21,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:21,707 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:21,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942671359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:21,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:21,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-13 20:21:21,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834499496] [2021-07-13 20:21:21,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:21:21,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:21,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:21:21,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:21:21,708 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) [2021-07-13 20:21:22,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:22,035 INFO L93 Difference]: Finished difference Result 1021 states and 4369 transitions. [2021-07-13 20:21:22,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:21:22,035 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 [2021-07-13 20:21:22,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:22,037 INFO L225 Difference]: With dead ends: 1021 [2021-07-13 20:21:22,037 INFO L226 Difference]: Without dead ends: 1013 [2021-07-13 20:21:22,037 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 820.6ms TimeCoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:21:22,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2021-07-13 20:21:22,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 974. [2021-07-13 20:21:22,048 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) [2021-07-13 20:21:22,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 4245 transitions. [2021-07-13 20:21:22,050 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 4245 transitions. Word has length 26 [2021-07-13 20:21:22,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:22,050 INFO L482 AbstractCegarLoop]: Abstraction has 974 states and 4245 transitions. [2021-07-13 20:21:22,050 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) [2021-07-13 20:21:22,050 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 4245 transitions. [2021-07-13 20:21:22,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:21:22,051 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:22,051 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:22,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-07-13 20:21:22,252 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:22,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:22,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1350944785, now seen corresponding path program 95 times [2021-07-13 20:21:22,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:22,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786349450] [2021-07-13 20:21:22,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:22,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:22,375 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:22,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:22,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786349450] [2021-07-13 20:21:22,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786349450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:22,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065641869] [2021-07-13 20:21:22,376 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 [2021-07-13 20:21:22,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:21:22,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:22,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:21:22,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:22,897 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 [2021-07-13 20:21:22,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:22,901 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 [2021-07-13 20:21:22,902 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:22,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:22,947 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. [2021-07-13 20:21:22,947 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:119, output treesize:105 [2021-07-13 20:21:23,070 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:23,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065641869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:23,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:23,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 20:21:23,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428592064] [2021-07-13 20:21:23,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:21:23,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:23,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:21:23,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:21:23,071 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) [2021-07-13 20:21:23,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:23,166 INFO L93 Difference]: Finished difference Result 995 states and 4253 transitions. [2021-07-13 20:21:23,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:21:23,167 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 [2021-07-13 20:21:23,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:23,169 INFO L225 Difference]: With dead ends: 995 [2021-07-13 20:21:23,169 INFO L226 Difference]: Without dead ends: 985 [2021-07-13 20:21:23,169 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 528.8ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:21:23,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2021-07-13 20:21:23,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 963. [2021-07-13 20:21:23,179 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) [2021-07-13 20:21:23,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 4188 transitions. [2021-07-13 20:21:23,182 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 4188 transitions. Word has length 26 [2021-07-13 20:21:23,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:23,182 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 4188 transitions. [2021-07-13 20:21:23,182 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) [2021-07-13 20:21:23,182 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 4188 transitions. [2021-07-13 20:21:23,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:21:23,183 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:23,183 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:23,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-07-13 20:21:23,384 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:23,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:23,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1919308587, now seen corresponding path program 96 times [2021-07-13 20:21:23,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:23,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608609060] [2021-07-13 20:21:23,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:23,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:23,541 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:23,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:23,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608609060] [2021-07-13 20:21:23,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608609060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:23,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306865060] [2021-07-13 20:21:23,542 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 [2021-07-13 20:21:23,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:21:23,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:23,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:21:23,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:24,087 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:24,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306865060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:24,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:24,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-13 20:21:24,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097752995] [2021-07-13 20:21:24,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:21:24,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:24,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:21:24,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:21:24,088 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) [2021-07-13 20:21:24,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:24,363 INFO L93 Difference]: Finished difference Result 1008 states and 4333 transitions. [2021-07-13 20:21:24,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:21:24,364 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 [2021-07-13 20:21:24,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:24,366 INFO L225 Difference]: With dead ends: 1008 [2021-07-13 20:21:24,366 INFO L226 Difference]: Without dead ends: 1003 [2021-07-13 20:21:24,366 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 646.1ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:21:24,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2021-07-13 20:21:24,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 965. [2021-07-13 20:21:24,377 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) [2021-07-13 20:21:24,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 4192 transitions. [2021-07-13 20:21:24,379 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 4192 transitions. Word has length 26 [2021-07-13 20:21:24,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:24,379 INFO L482 AbstractCegarLoop]: Abstraction has 965 states and 4192 transitions. [2021-07-13 20:21:24,379 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) [2021-07-13 20:21:24,379 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 4192 transitions. [2021-07-13 20:21:24,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:21:24,381 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:24,381 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:24,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable449 [2021-07-13 20:21:24,581 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:24,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:24,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1211170747, now seen corresponding path program 97 times [2021-07-13 20:21:24,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:24,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238915959] [2021-07-13 20:21:24,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:24,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:24,853 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:24,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:24,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238915959] [2021-07-13 20:21:24,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238915959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:24,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710252954] [2021-07-13 20:21:24,853 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 [2021-07-13 20:21:24,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:24,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:21:24,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:25,434 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:25,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710252954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:25,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:25,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-13 20:21:25,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444590255] [2021-07-13 20:21:25,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:21:25,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:25,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:21:25,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:21:25,435 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) [2021-07-13 20:21:25,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:25,987 INFO L93 Difference]: Finished difference Result 1251 states and 5174 transitions. [2021-07-13 20:21:25,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:21:25,987 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 [2021-07-13 20:21:25,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:25,989 INFO L225 Difference]: With dead ends: 1251 [2021-07-13 20:21:25,989 INFO L226 Difference]: Without dead ends: 1222 [2021-07-13 20:21:25,990 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 887.7ms TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:21:25,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2021-07-13 20:21:26,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 1036. [2021-07-13 20:21:26,001 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) [2021-07-13 20:21:26,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 4489 transitions. [2021-07-13 20:21:26,004 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 4489 transitions. Word has length 26 [2021-07-13 20:21:26,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:26,004 INFO L482 AbstractCegarLoop]: Abstraction has 1036 states and 4489 transitions. [2021-07-13 20:21:26,004 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) [2021-07-13 20:21:26,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 4489 transitions. [2021-07-13 20:21:26,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:21:26,005 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:26,005 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:26,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-07-13 20:21:26,207 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:26,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:26,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1876399727, now seen corresponding path program 98 times [2021-07-13 20:21:26,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:26,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580543709] [2021-07-13 20:21:26,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:26,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:26,349 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:21:26,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:26,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580543709] [2021-07-13 20:21:26,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580543709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:26,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718662145] [2021-07-13 20:21:26,349 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 [2021-07-13 20:21:26,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:21:26,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:26,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:21:26,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:26,851 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 [2021-07-13 20:21:26,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:26,855 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 [2021-07-13 20:21:26,856 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:26,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:26,936 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 [2021-07-13 20:21:26,937 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:26,940 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 [2021-07-13 20:21:26,941 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:27,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:27,034 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. [2021-07-13 20:21:27,035 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:251, output treesize:223 [2021-07-13 20:22:42,466 WARN L205 SmtUtils]: Spent 1.26 m on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2021-07-13 20:22:42,584 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:22:42,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718662145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:42,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:42,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 20:22:42,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175224207] [2021-07-13 20:22:42,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:22:42,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:42,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:22:42,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:22:42,584 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) [2021-07-13 20:23:46,304 WARN L205 SmtUtils]: Spent 1.06 m on a formula simplification. DAG size of input: 105 DAG size of output: 97 [2021-07-13 20:23:46,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:46,361 INFO L93 Difference]: Finished difference Result 1372 states and 5445 transitions. [2021-07-13 20:23:46,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:23:46,361 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 [2021-07-13 20:23:46,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:46,364 INFO L225 Difference]: With dead ends: 1372 [2021-07-13 20:23:46,364 INFO L226 Difference]: Without dead ends: 1354 [2021-07-13 20:23:46,364 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 139435.6ms TimeCoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:23:46,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-07-13 20:23:46,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 968. [2021-07-13 20:23:46,377 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) [2021-07-13 20:23:46,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 4129 transitions. [2021-07-13 20:23:46,379 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 4129 transitions. Word has length 26 [2021-07-13 20:23:46,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:46,379 INFO L482 AbstractCegarLoop]: Abstraction has 968 states and 4129 transitions. [2021-07-13 20:23:46,379 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) [2021-07-13 20:23:46,379 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 4129 transitions. [2021-07-13 20:23:46,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:23:46,381 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:46,381 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:23:46,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable457 [2021-07-13 20:23:46,581 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:46,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:46,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1393853645, now seen corresponding path program 99 times [2021-07-13 20:23:46,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:46,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969448714] [2021-07-13 20:23:46,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:46,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:46,779 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:46,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:46,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969448714] [2021-07-13 20:23:46,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969448714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:46,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455684383] [2021-07-13 20:23:46,780 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 [2021-07-13 20:23:46,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:23:46,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:46,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:23:46,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:47,385 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:47,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455684383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:47,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:47,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-13 20:23:47,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000872245] [2021-07-13 20:23:47,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:23:47,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:47,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:23:47,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:23:47,386 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) [2021-07-13 20:23:47,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:47,681 INFO L93 Difference]: Finished difference Result 1031 states and 4316 transitions. [2021-07-13 20:23:47,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:23:47,682 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 [2021-07-13 20:23:47,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:47,684 INFO L225 Difference]: With dead ends: 1031 [2021-07-13 20:23:47,684 INFO L226 Difference]: Without dead ends: 1023 [2021-07-13 20:23:47,684 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 680.8ms TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:23:47,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2021-07-13 20:23:47,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 981. [2021-07-13 20:23:47,695 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) [2021-07-13 20:23:47,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 4174 transitions. [2021-07-13 20:23:47,698 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 4174 transitions. Word has length 26 [2021-07-13 20:23:47,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:47,698 INFO L482 AbstractCegarLoop]: Abstraction has 981 states and 4174 transitions. [2021-07-13 20:23:47,698 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) [2021-07-13 20:23:47,698 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 4174 transitions. [2021-07-13 20:23:47,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:23:47,700 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:47,700 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:23:47,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable463 [2021-07-13 20:23:47,900 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:47,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:47,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1558879243, now seen corresponding path program 100 times [2021-07-13 20:23:47,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:47,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405089981] [2021-07-13 20:23:47,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:47,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:48,038 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:48,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:48,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405089981] [2021-07-13 20:23:48,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405089981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:48,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683019479] [2021-07-13 20:23:48,038 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 [2021-07-13 20:23:48,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:23:48,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:48,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:23:48,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:48,322 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 [2021-07-13 20:23:48,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:23:48,328 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 [2021-07-13 20:23:48,329 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:23:48,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:48,373 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. [2021-07-13 20:23:48,373 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:105, output treesize:91 [2021-07-13 20:23:48,492 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:48,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683019479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:48,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:48,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-07-13 20:23:48,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254632706] [2021-07-13 20:23:48,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:23:48,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:48,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:23:48,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:23:48,493 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) [2021-07-13 20:23:52,848 WARN L205 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2021-07-13 20:23:57,359 WARN L205 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-07-13 20:23:57,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:57,422 INFO L93 Difference]: Finished difference Result 1006 states and 4214 transitions. [2021-07-13 20:23:57,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:23:57,422 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 [2021-07-13 20:23:57,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:57,424 INFO L225 Difference]: With dead ends: 1006 [2021-07-13 20:23:57,424 INFO L226 Difference]: Without dead ends: 998 [2021-07-13 20:23:57,424 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 8761.0ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:23:57,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2021-07-13 20:23:57,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 972. [2021-07-13 20:23:57,435 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) [2021-07-13 20:23:57,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 4133 transitions. [2021-07-13 20:23:57,437 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 4133 transitions. Word has length 26 [2021-07-13 20:23:57,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:57,437 INFO L482 AbstractCegarLoop]: Abstraction has 972 states and 4133 transitions. [2021-07-13 20:23:57,437 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) [2021-07-13 20:23:57,438 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 4133 transitions. [2021-07-13 20:23:57,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:23:57,439 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:57,439 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:23:57,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-07-13 20:23:57,640 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:57,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:57,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1004144201, now seen corresponding path program 101 times [2021-07-13 20:23:57,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:57,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840386692] [2021-07-13 20:23:57,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:57,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:57,864 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:57,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:57,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840386692] [2021-07-13 20:23:57,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840386692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:57,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774595846] [2021-07-13 20:23:57,864 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 [2021-07-13 20:23:57,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:23:57,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:57,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:23:57,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:58,398 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:58,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774595846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:58,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:58,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-13 20:23:58,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027892309] [2021-07-13 20:23:58,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:23:58,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:58,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:23:58,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:23:58,399 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) [2021-07-13 20:23:58,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:58,703 INFO L93 Difference]: Finished difference Result 1074 states and 4467 transitions. [2021-07-13 20:23:58,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:23:58,704 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 [2021-07-13 20:23:58,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:58,706 INFO L225 Difference]: With dead ends: 1074 [2021-07-13 20:23:58,706 INFO L226 Difference]: Without dead ends: 1064 [2021-07-13 20:23:58,706 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 711.5ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:23:58,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2021-07-13 20:23:58,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 998. [2021-07-13 20:23:58,717 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) [2021-07-13 20:23:58,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 4223 transitions. [2021-07-13 20:23:58,719 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 4223 transitions. Word has length 26 [2021-07-13 20:23:58,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:58,720 INFO L482 AbstractCegarLoop]: Abstraction has 998 states and 4223 transitions. [2021-07-13 20:23:58,720 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) [2021-07-13 20:23:58,720 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 4223 transitions. [2021-07-13 20:23:58,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:23:58,721 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:58,721 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:23:58,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:58,922 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:58,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:58,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1300083919, now seen corresponding path program 102 times [2021-07-13 20:23:58,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:58,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258113611] [2021-07-13 20:23:58,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:58,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:59,021 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:59,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:59,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258113611] [2021-07-13 20:23:59,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258113611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:59,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779940696] [2021-07-13 20:23:59,022 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:23:59,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:23:59,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:59,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:23:59,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:59,492 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 [2021-07-13 20:23:59,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:23:59,512 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 [2021-07-13 20:23:59,513 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:23:59,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:59,543 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. [2021-07-13 20:23:59,543 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:99, output treesize:85 [2021-07-13 20:23:59,625 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:59,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779940696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:59,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:59,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 19 [2021-07-13 20:23:59,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857776173] [2021-07-13 20:23:59,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:23:59,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:59,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:23:59,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:23:59,626 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) [2021-07-13 20:23:59,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:59,911 INFO L93 Difference]: Finished difference Result 1103 states and 4427 transitions. [2021-07-13 20:23:59,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:23:59,911 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 [2021-07-13 20:23:59,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:59,913 INFO L225 Difference]: With dead ends: 1103 [2021-07-13 20:23:59,913 INFO L226 Difference]: Without dead ends: 1087 [2021-07-13 20:23:59,913 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 604.0ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:23:59,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2021-07-13 20:23:59,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 1004. [2021-07-13 20:23:59,924 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) [2021-07-13 20:23:59,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 4213 transitions. [2021-07-13 20:23:59,926 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 4213 transitions. Word has length 26 [2021-07-13 20:23:59,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:59,926 INFO L482 AbstractCegarLoop]: Abstraction has 1004 states and 4213 transitions. [2021-07-13 20:23:59,926 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) [2021-07-13 20:23:59,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 4213 transitions. [2021-07-13 20:23:59,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:23:59,928 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:59,928 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:24:00,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:24:00,128 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:24:00,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:24:00,129 INFO L82 PathProgramCache]: Analyzing trace with hash -897954321, now seen corresponding path program 103 times [2021-07-13 20:24:00,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:24:00,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435350877] [2021-07-13 20:24:00,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:24:00,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:24:00,301 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:00,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:24:00,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435350877] [2021-07-13 20:24:00,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435350877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:00,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662731212] [2021-07-13 20:24:00,301 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:24:00,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:24:00,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:24:00,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:24:00,860 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:00,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662731212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:00,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:24:00,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-13 20:24:00,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391846567] [2021-07-13 20:24:00,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:24:00,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:24:00,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:24:00,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:24:00,861 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) [2021-07-13 20:24:01,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:24:01,054 INFO L93 Difference]: Finished difference Result 1059 states and 4372 transitions. [2021-07-13 20:24:01,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:24:01,054 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 [2021-07-13 20:24:01,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:24:01,056 INFO L225 Difference]: With dead ends: 1059 [2021-07-13 20:24:01,057 INFO L226 Difference]: Without dead ends: 1051 [2021-07-13 20:24:01,057 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 610.5ms TimeCoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:24:01,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2021-07-13 20:24:01,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 1004. [2021-07-13 20:24:01,067 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) [2021-07-13 20:24:01,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 4213 transitions. [2021-07-13 20:24:01,070 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 4213 transitions. Word has length 26 [2021-07-13 20:24:01,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:24:01,070 INFO L482 AbstractCegarLoop]: Abstraction has 1004 states and 4213 transitions. [2021-07-13 20:24:01,070 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) [2021-07-13 20:24:01,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 4213 transitions. [2021-07-13 20:24:01,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:24:01,071 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:24:01,071 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:24:01,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-07-13 20:24:01,272 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:24:01,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:24:01,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1993141583, now seen corresponding path program 104 times [2021-07-13 20:24:01,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:24:01,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974726021] [2021-07-13 20:24:01,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:24:01,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:24:01,361 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:24:01,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:24:01,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974726021] [2021-07-13 20:24:01,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974726021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:01,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625486630] [2021-07-13 20:24:01,361 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 [2021-07-13 20:24:01,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:24:01,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:24:01,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 20:24:01,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:24:01,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-13 20:24:01,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:24:01,777 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 [2021-07-13 20:24:01,778 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:24:01,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:01,860 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 [2021-07-13 20:24:01,861 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:24:01,865 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 [2021-07-13 20:24:01,866 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:24:01,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:01,949 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. [2021-07-13 20:24:01,950 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:251, output treesize:223 [2021-07-13 20:25:22,640 WARN L205 SmtUtils]: Spent 1.34 m on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2021-07-13 20:25:22,726 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:25:22,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625486630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:22,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:22,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-07-13 20:25:22,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308015179] [2021-07-13 20:25:22,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:25:22,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:22,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:25:22,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:25:22,727 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) [2021-07-13 20:26:52,050 WARN L205 SmtUtils]: Spent 1.49 m on a formula simplification. DAG size of input: 98 DAG size of output: 96 [2021-07-13 20:26:52,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:52,143 INFO L93 Difference]: Finished difference Result 1021 states and 4224 transitions. [2021-07-13 20:26:52,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:26:52,143 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 [2021-07-13 20:26:52,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:52,145 INFO L225 Difference]: With dead ends: 1021 [2021-07-13 20:26:52,145 INFO L226 Difference]: Without dead ends: 1013 [2021-07-13 20:26:52,145 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 170272.5ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:26:52,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2021-07-13 20:26:52,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 989. [2021-07-13 20:26:52,156 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) [2021-07-13 20:26:52,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 4152 transitions. [2021-07-13 20:26:52,158 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 4152 transitions. Word has length 26 [2021-07-13 20:26:52,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:52,158 INFO L482 AbstractCegarLoop]: Abstraction has 989 states and 4152 transitions. [2021-07-13 20:26:52,158 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) [2021-07-13 20:26:52,158 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 4152 transitions. [2021-07-13 20:26:52,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:26:52,160 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:52,160 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:26:52,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:52,361 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:52,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:52,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1627018895, now seen corresponding path program 105 times [2021-07-13 20:26:52,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:52,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860797125] [2021-07-13 20:26:52,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:52,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:52,516 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:52,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:52,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860797125] [2021-07-13 20:26:52,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860797125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:52,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950682305] [2021-07-13 20:26:52,517 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 [2021-07-13 20:26:52,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 20:26:52,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:26:52,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:26:52,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:53,078 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:53,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950682305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:53,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:53,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-13 20:26:53,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947813681] [2021-07-13 20:26:53,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:26:53,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:53,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:26:53,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:26:53,079 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) [2021-07-13 20:26:53,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:53,431 INFO L93 Difference]: Finished difference Result 1036 states and 4291 transitions. [2021-07-13 20:26:53,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:26:53,431 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 [2021-07-13 20:26:53,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:53,433 INFO L225 Difference]: With dead ends: 1036 [2021-07-13 20:26:53,433 INFO L226 Difference]: Without dead ends: 1028 [2021-07-13 20:26:53,433 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 732.3ms TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:26:53,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2021-07-13 20:26:53,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 985. [2021-07-13 20:26:53,444 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) [2021-07-13 20:26:53,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 4144 transitions. [2021-07-13 20:26:53,446 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 4144 transitions. Word has length 26 [2021-07-13 20:26:53,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:53,447 INFO L482 AbstractCegarLoop]: Abstraction has 985 states and 4144 transitions. [2021-07-13 20:26:53,447 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) [2021-07-13 20:26:53,447 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 4144 transitions. [2021-07-13 20:26:53,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:26:53,448 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:53,448 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:26:53,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-07-13 20:26:53,649 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:53,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:53,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1202707659, now seen corresponding path program 106 times [2021-07-13 20:26:53,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:53,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765353636] [2021-07-13 20:26:53,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:53,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:53,832 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:53,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:53,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765353636] [2021-07-13 20:26:53,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765353636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:53,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824789901] [2021-07-13 20:26:53,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:26:53,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:26:53,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:26:53,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:26:53,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:54,511 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:54,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824789901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:54,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:54,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-13 20:26:54,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666890589] [2021-07-13 20:26:54,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:26:54,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:54,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:26:54,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:26:54,512 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) [2021-07-13 20:26:54,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:54,917 INFO L93 Difference]: Finished difference Result 1044 states and 4311 transitions. [2021-07-13 20:26:54,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:26:54,917 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 [2021-07-13 20:26:54,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:54,919 INFO L225 Difference]: With dead ends: 1044 [2021-07-13 20:26:54,919 INFO L226 Difference]: Without dead ends: 1036 [2021-07-13 20:26:54,919 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 896.6ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:26:54,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2021-07-13 20:26:54,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 983. [2021-07-13 20:26:54,930 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) [2021-07-13 20:26:54,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 4139 transitions. [2021-07-13 20:26:54,932 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 4139 transitions. Word has length 26 [2021-07-13 20:26:54,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:54,932 INFO L482 AbstractCegarLoop]: Abstraction has 983 states and 4139 transitions. [2021-07-13 20:26:54,932 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) [2021-07-13 20:26:54,932 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 4139 transitions. [2021-07-13 20:26:54,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:26:54,934 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:54,934 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:26:55,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:55,153 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:55,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:55,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1918224333, now seen corresponding path program 107 times [2021-07-13 20:26:55,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:55,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667821448] [2021-07-13 20:26:55,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:55,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:55,234 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:26:55,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:55,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667821448] [2021-07-13 20:26:55,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667821448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:55,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226027391] [2021-07-13 20:26:55,235 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 [2021-07-13 20:26:55,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:26:55,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:26:55,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 20:26:55,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:55,639 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 [2021-07-13 20:26:55,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:55,642 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 [2021-07-13 20:26:55,643 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:55,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:55,700 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. [2021-07-13 20:26:55,700 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:129, output treesize:115 [2021-07-13 20:26:55,840 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:26:55,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226027391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:55,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:55,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-07-13 20:26:55,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732766995] [2021-07-13 20:26:55,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:26:55,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:55,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:26:55,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:26:55,841 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) [2021-07-13 20:26:55,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:55,988 INFO L93 Difference]: Finished difference Result 949 states and 3881 transitions. [2021-07-13 20:26:55,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:26:55,989 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 [2021-07-13 20:26:55,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:55,991 INFO L225 Difference]: With dead ends: 949 [2021-07-13 20:26:55,991 INFO L226 Difference]: Without dead ends: 939 [2021-07-13 20:26:55,991 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 441.7ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:26:55,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-07-13 20:26:56,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 911. [2021-07-13 20:26:56,001 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) [2021-07-13 20:26:56,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 3800 transitions. [2021-07-13 20:26:56,003 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 3800 transitions. Word has length 26 [2021-07-13 20:26:56,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:56,003 INFO L482 AbstractCegarLoop]: Abstraction has 911 states and 3800 transitions. [2021-07-13 20:26:56,003 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) [2021-07-13 20:26:56,003 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 3800 transitions. [2021-07-13 20:26:56,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:26:56,004 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:56,004 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:26:56,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-07-13 20:26:56,205 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:56,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:56,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1352029039, now seen corresponding path program 108 times [2021-07-13 20:26:56,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:56,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425768889] [2021-07-13 20:26:56,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:56,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:56,482 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:56,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:56,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425768889] [2021-07-13 20:26:56,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425768889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:56,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097541322] [2021-07-13 20:26:56,482 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 [2021-07-13 20:26:56,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:26:56,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:26:56,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:26:56,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:57,109 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:57,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097541322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:57,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:57,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-13 20:26:57,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247154445] [2021-07-13 20:26:57,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:26:57,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:57,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:26:57,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:26:57,110 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) [2021-07-13 20:26:57,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:57,428 INFO L93 Difference]: Finished difference Result 985 states and 4052 transitions. [2021-07-13 20:26:57,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:26:57,429 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 [2021-07-13 20:26:57,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:57,431 INFO L225 Difference]: With dead ends: 985 [2021-07-13 20:26:57,431 INFO L226 Difference]: Without dead ends: 975 [2021-07-13 20:26:57,431 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 829.8ms TimeCoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:26:57,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-07-13 20:26:57,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 915. [2021-07-13 20:26:57,441 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) [2021-07-13 20:26:57,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 3810 transitions. [2021-07-13 20:26:57,443 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 3810 transitions. Word has length 26 [2021-07-13 20:26:57,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:57,443 INFO L482 AbstractCegarLoop]: Abstraction has 915 states and 3810 transitions. [2021-07-13 20:26:57,443 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) [2021-07-13 20:26:57,443 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 3810 transitions. [2021-07-13 20:26:57,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:26:57,445 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:57,445 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:26:57,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable501,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:57,645 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:57,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:57,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1778450295, now seen corresponding path program 109 times [2021-07-13 20:26:57,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:57,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483813202] [2021-07-13 20:26:57,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:57,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:57,857 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:57,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:57,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483813202] [2021-07-13 20:26:57,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483813202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:57,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885277115] [2021-07-13 20:26:57,858 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 [2021-07-13 20:26:57,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:57,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:26:57,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:58,525 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:58,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885277115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:58,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:58,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-13 20:26:58,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037249590] [2021-07-13 20:26:58,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:26:58,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:58,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:26:58,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:26:58,526 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) [2021-07-13 20:26:58,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:58,931 INFO L93 Difference]: Finished difference Result 958 states and 3949 transitions. [2021-07-13 20:26:58,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:26:58,931 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 [2021-07-13 20:26:58,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:58,933 INFO L225 Difference]: With dead ends: 958 [2021-07-13 20:26:58,933 INFO L226 Difference]: Without dead ends: 953 [2021-07-13 20:26:58,933 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 910.4ms TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:26:58,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-07-13 20:26:58,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 907. [2021-07-13 20:26:58,943 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) [2021-07-13 20:26:58,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 3788 transitions. [2021-07-13 20:26:58,945 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 3788 transitions. Word has length 26 [2021-07-13 20:26:58,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:58,945 INFO L482 AbstractCegarLoop]: Abstraction has 907 states and 3788 transitions. [2021-07-13 20:26:58,945 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) [2021-07-13 20:26:58,945 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 3788 transitions. [2021-07-13 20:26:58,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:26:58,947 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:58,947 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:26:59,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:59,147 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:59,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:59,147 INFO L82 PathProgramCache]: Analyzing trace with hash 826574097, now seen corresponding path program 110 times [2021-07-13 20:26:59,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:59,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165846644] [2021-07-13 20:26:59,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:59,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:59,322 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:59,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:59,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165846644] [2021-07-13 20:26:59,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165846644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:59,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202709640] [2021-07-13 20:26:59,322 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 [2021-07-13 20:26:59,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:26:59,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:26:59,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:26:59,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:59,879 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:59,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202709640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:59,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:59,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-13 20:26:59,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590304661] [2021-07-13 20:26:59,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:26:59,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:59,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:26:59,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:26:59,880 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) [2021-07-13 20:27:00,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:00,284 INFO L93 Difference]: Finished difference Result 954 states and 3919 transitions. [2021-07-13 20:27:00,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:27:00,284 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 [2021-07-13 20:27:00,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:00,286 INFO L225 Difference]: With dead ends: 954 [2021-07-13 20:27:00,286 INFO L226 Difference]: Without dead ends: 946 [2021-07-13 20:27:00,286 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 782.5ms TimeCoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:27:00,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-07-13 20:27:00,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 895. [2021-07-13 20:27:00,297 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) [2021-07-13 20:27:00,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 3752 transitions. [2021-07-13 20:27:00,299 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 3752 transitions. Word has length 26 [2021-07-13 20:27:00,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:00,299 INFO L482 AbstractCegarLoop]: Abstraction has 895 states and 3752 transitions. [2021-07-13 20:27:00,299 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) [2021-07-13 20:27:00,299 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 3752 transitions. [2021-07-13 20:27:00,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:27:00,300 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:00,300 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:00,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable512 [2021-07-13 20:27:00,501 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:00,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:00,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1463466562, now seen corresponding path program 111 times [2021-07-13 20:27:00,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:00,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922947703] [2021-07-13 20:27:00,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:00,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:00,664 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:00,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:00,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922947703] [2021-07-13 20:27:00,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922947703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:00,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143065393] [2021-07-13 20:27:00,664 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 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 [2021-07-13 20:27:00,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:27:00,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:00,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:27:00,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:01,382 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:01,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143065393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:01,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:01,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-13 20:27:01,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117782644] [2021-07-13 20:27:01,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:27:01,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:01,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:27:01,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:27:01,383 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) [2021-07-13 20:27:01,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:01,691 INFO L93 Difference]: Finished difference Result 925 states and 3819 transitions. [2021-07-13 20:27:01,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:27:01,692 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 [2021-07-13 20:27:01,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:01,694 INFO L225 Difference]: With dead ends: 925 [2021-07-13 20:27:01,694 INFO L226 Difference]: Without dead ends: 909 [2021-07-13 20:27:01,694 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 850.0ms TimeCoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:27:01,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2021-07-13 20:27:01,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 897. [2021-07-13 20:27:01,703 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) [2021-07-13 20:27:01,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3746 transitions. [2021-07-13 20:27:01,705 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3746 transitions. Word has length 27 [2021-07-13 20:27:01,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:01,705 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 3746 transitions. [2021-07-13 20:27:01,706 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) [2021-07-13 20:27:01,706 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3746 transitions. [2021-07-13 20:27:01,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:27:01,707 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:01,707 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:01,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:01,908 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:01,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:01,908 INFO L82 PathProgramCache]: Analyzing trace with hash 275921892, now seen corresponding path program 112 times [2021-07-13 20:27:01,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:01,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481348639] [2021-07-13 20:27:01,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:01,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:02,083 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:02,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:02,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481348639] [2021-07-13 20:27:02,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481348639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:02,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078028299] [2021-07-13 20:27:02,083 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 [2021-07-13 20:27:02,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:27:02,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:02,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:27:02,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:02,690 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:02,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078028299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:02,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:02,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-13 20:27:02,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281168115] [2021-07-13 20:27:02,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:27:02,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:02,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:27:02,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:27:02,691 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) [2021-07-13 20:27:03,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:03,201 INFO L93 Difference]: Finished difference Result 922 states and 3798 transitions. [2021-07-13 20:27:03,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:27:03,202 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 [2021-07-13 20:27:03,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:03,203 INFO L225 Difference]: With dead ends: 922 [2021-07-13 20:27:03,203 INFO L226 Difference]: Without dead ends: 908 [2021-07-13 20:27:03,204 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 939.2ms TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:27:03,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2021-07-13 20:27:03,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 891. [2021-07-13 20:27:03,213 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) [2021-07-13 20:27:03,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 3721 transitions. [2021-07-13 20:27:03,215 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 3721 transitions. Word has length 27 [2021-07-13 20:27:03,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:03,215 INFO L482 AbstractCegarLoop]: Abstraction has 891 states and 3721 transitions. [2021-07-13 20:27:03,215 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) [2021-07-13 20:27:03,215 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 3721 transitions. [2021-07-13 20:27:03,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:27:03,217 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:03,217 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:03,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2021-07-13 20:27:03,417 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:03,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:03,418 INFO L82 PathProgramCache]: Analyzing trace with hash -572700580, now seen corresponding path program 113 times [2021-07-13 20:27:03,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:03,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548352496] [2021-07-13 20:27:03,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:03,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:03,643 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:03,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:03,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548352496] [2021-07-13 20:27:03,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548352496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:03,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857864377] [2021-07-13 20:27:03,643 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 [2021-07-13 20:27:03,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:27:03,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:03,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:27:03,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:04,406 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:04,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857864377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:04,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:04,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-13 20:27:04,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931765789] [2021-07-13 20:27:04,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:27:04,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:04,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:27:04,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:27:04,407 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) [2021-07-13 20:27:04,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:04,681 INFO L93 Difference]: Finished difference Result 933 states and 3816 transitions. [2021-07-13 20:27:04,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:27:04,682 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 [2021-07-13 20:27:04,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:04,683 INFO L225 Difference]: With dead ends: 933 [2021-07-13 20:27:04,683 INFO L226 Difference]: Without dead ends: 913 [2021-07-13 20:27:04,684 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 870.9ms TimeCoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:27:04,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2021-07-13 20:27:04,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 888. [2021-07-13 20:27:04,693 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) [2021-07-13 20:27:04,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3703 transitions. [2021-07-13 20:27:04,695 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3703 transitions. Word has length 27 [2021-07-13 20:27:04,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:04,695 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3703 transitions. [2021-07-13 20:27:04,695 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) [2021-07-13 20:27:04,695 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3703 transitions. [2021-07-13 20:27:04,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:27:04,697 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:04,697 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:04,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable524,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:04,897 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:04,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:04,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1255922468, now seen corresponding path program 114 times [2021-07-13 20:27:04,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:04,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285915542] [2021-07-13 20:27:04,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:04,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:05,007 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:05,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:05,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285915542] [2021-07-13 20:27:05,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285915542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:05,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803113972] [2021-07-13 20:27:05,008 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 [2021-07-13 20:27:05,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:27:05,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:05,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:27:05,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:05,469 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 [2021-07-13 20:27:05,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:05,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:05,485 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 [2021-07-13 20:27:05,486 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:05,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:05,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:05,496 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:50, output treesize:36 [2021-07-13 20:27:05,532 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:05,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803113972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:05,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:05,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 22 [2021-07-13 20:27:05,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241813915] [2021-07-13 20:27:05,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:27:05,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:05,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:27:05,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:27:05,533 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) [2021-07-13 20:27:05,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:05,868 INFO L93 Difference]: Finished difference Result 1936 states and 7355 transitions. [2021-07-13 20:27:05,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:27:05,868 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 [2021-07-13 20:27:05,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:05,872 INFO L225 Difference]: With dead ends: 1936 [2021-07-13 20:27:05,872 INFO L226 Difference]: Without dead ends: 1912 [2021-07-13 20:27:05,872 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 502.2ms TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:27:05,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1912 states. [2021-07-13 20:27:05,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1912 to 960. [2021-07-13 20:27:05,888 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) [2021-07-13 20:27:05,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 4039 transitions. [2021-07-13 20:27:05,890 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 4039 transitions. Word has length 27 [2021-07-13 20:27:05,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:05,890 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 4039 transitions. [2021-07-13 20:27:05,890 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) [2021-07-13 20:27:05,890 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 4039 transitions. [2021-07-13 20:27:05,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:27:05,892 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:05,892 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:06,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable530,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:06,092 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:06,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:06,093 INFO L82 PathProgramCache]: Analyzing trace with hash 231208544, now seen corresponding path program 115 times [2021-07-13 20:27:06,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:06,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167910692] [2021-07-13 20:27:06,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:06,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:06,253 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:06,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:06,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167910692] [2021-07-13 20:27:06,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167910692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:06,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495067688] [2021-07-13 20:27:06,254 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 [2021-07-13 20:27:06,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:06,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:27:06,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:06,713 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:06,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495067688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:06,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:06,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-13 20:27:06,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179566393] [2021-07-13 20:27:06,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:27:06,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:06,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:27:06,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:27:06,714 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) [2021-07-13 20:27:07,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:07,137 INFO L93 Difference]: Finished difference Result 989 states and 4112 transitions. [2021-07-13 20:27:07,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:27:07,137 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 [2021-07-13 20:27:07,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:07,139 INFO L225 Difference]: With dead ends: 989 [2021-07-13 20:27:07,139 INFO L226 Difference]: Without dead ends: 982 [2021-07-13 20:27:07,139 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 702.8ms TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:27:07,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2021-07-13 20:27:07,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 964. [2021-07-13 20:27:07,150 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) [2021-07-13 20:27:07,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 4042 transitions. [2021-07-13 20:27:07,152 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 4042 transitions. Word has length 27 [2021-07-13 20:27:07,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:07,153 INFO L482 AbstractCegarLoop]: Abstraction has 964 states and 4042 transitions. [2021-07-13 20:27:07,153 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) [2021-07-13 20:27:07,153 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 4042 transitions. [2021-07-13 20:27:07,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:27:07,154 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:07,154 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:07,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2021-07-13 20:27:07,355 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:07,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:07,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1019543526, now seen corresponding path program 116 times [2021-07-13 20:27:07,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:07,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762628303] [2021-07-13 20:27:07,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:07,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:07,500 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:07,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:07,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762628303] [2021-07-13 20:27:07,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762628303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:07,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724759742] [2021-07-13 20:27:07,500 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 [2021-07-13 20:27:07,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:27:07,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:07,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:27:07,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:07,978 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 [2021-07-13 20:27:07,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:08,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:08,020 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 [2021-07-13 20:27:08,020 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:08,024 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 [2021-07-13 20:27:08,025 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:08,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:08,060 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 [2021-07-13 20:27:08,061 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:08,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:08,096 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. [2021-07-13 20:27:08,096 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 11 variables, input treesize:121, output treesize:93 [2021-07-13 20:27:10,157 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 57 [2021-07-13 20:27:10,207 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:10,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724759742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:10,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:10,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 20:27:10,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795683700] [2021-07-13 20:27:10,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:27:10,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:10,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:27:10,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:27:10,208 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) [2021-07-13 20:27:14,704 WARN L205 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-07-13 20:27:16,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:16,731 INFO L93 Difference]: Finished difference Result 1301 states and 5054 transitions. [2021-07-13 20:27:16,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:27:16,731 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 [2021-07-13 20:27:16,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:16,734 INFO L225 Difference]: With dead ends: 1301 [2021-07-13 20:27:16,734 INFO L226 Difference]: Without dead ends: 1282 [2021-07-13 20:27:16,734 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 4738.6ms TimeCoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:27:16,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2021-07-13 20:27:16,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 1004. [2021-07-13 20:27:16,746 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) [2021-07-13 20:27:16,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 4174 transitions. [2021-07-13 20:27:16,749 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 4174 transitions. Word has length 27 [2021-07-13 20:27:16,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:16,749 INFO L482 AbstractCegarLoop]: Abstraction has 1004 states and 4174 transitions. [2021-07-13 20:27:16,749 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) [2021-07-13 20:27:16,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 4174 transitions. [2021-07-13 20:27:16,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:27:16,750 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:16,750 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:16,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-07-13 20:27:16,951 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:16,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:16,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1395696506, now seen corresponding path program 117 times [2021-07-13 20:27:16,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:16,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106751597] [2021-07-13 20:27:16,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:16,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:17,110 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:17,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:17,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106751597] [2021-07-13 20:27:17,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106751597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:17,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785889078] [2021-07-13 20:27:17,110 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 [2021-07-13 20:27:17,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:27:17,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:17,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:27:17,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:17,649 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:17,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785889078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:17,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:17,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-13 20:27:17,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239426292] [2021-07-13 20:27:17,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:27:17,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:17,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:27:17,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:27:17,650 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) [2021-07-13 20:27:18,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:18,094 INFO L93 Difference]: Finished difference Result 1036 states and 4233 transitions. [2021-07-13 20:27:18,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:27:18,094 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 [2021-07-13 20:27:18,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:18,096 INFO L225 Difference]: With dead ends: 1036 [2021-07-13 20:27:18,096 INFO L226 Difference]: Without dead ends: 1018 [2021-07-13 20:27:18,096 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 763.9ms TimeCoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:27:18,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2021-07-13 20:27:18,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 991. [2021-07-13 20:27:18,107 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) [2021-07-13 20:27:18,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 4120 transitions. [2021-07-13 20:27:18,109 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 4120 transitions. Word has length 27 [2021-07-13 20:27:18,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:18,109 INFO L482 AbstractCegarLoop]: Abstraction has 991 states and 4120 transitions. [2021-07-13 20:27:18,109 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) [2021-07-13 20:27:18,109 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 4120 transitions. [2021-07-13 20:27:18,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:27:18,111 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:18,111 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:18,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2021-07-13 20:27:18,311 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:18,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:18,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1704301448, now seen corresponding path program 118 times [2021-07-13 20:27:18,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:18,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847625157] [2021-07-13 20:27:18,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:18,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:18,487 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:18,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:18,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847625157] [2021-07-13 20:27:18,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847625157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:18,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494235100] [2021-07-13 20:27:18,487 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 [2021-07-13 20:27:18,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:27:18,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:18,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:27:18,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:19,154 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:19,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494235100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:19,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:19,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-13 20:27:19,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390037742] [2021-07-13 20:27:19,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:27:19,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:19,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:27:19,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:27:19,155 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) [2021-07-13 20:27:19,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:19,519 INFO L93 Difference]: Finished difference Result 1016 states and 4172 transitions. [2021-07-13 20:27:19,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:27:19,520 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 [2021-07-13 20:27:19,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:19,521 INFO L225 Difference]: With dead ends: 1016 [2021-07-13 20:27:19,522 INFO L226 Difference]: Without dead ends: 1002 [2021-07-13 20:27:19,522 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 843.7ms TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:27:19,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2021-07-13 20:27:19,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 988. [2021-07-13 20:27:19,533 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) [2021-07-13 20:27:19,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 4102 transitions. [2021-07-13 20:27:19,535 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 4102 transitions. Word has length 27 [2021-07-13 20:27:19,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:19,535 INFO L482 AbstractCegarLoop]: Abstraction has 988 states and 4102 transitions. [2021-07-13 20:27:19,535 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) [2021-07-13 20:27:19,535 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 4102 transitions. [2021-07-13 20:27:19,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:27:19,537 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:19,537 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:19,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:19,738 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:19,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:19,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1973047876, now seen corresponding path program 119 times [2021-07-13 20:27:19,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:19,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409962812] [2021-07-13 20:27:19,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:19,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:19,895 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:19,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:19,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409962812] [2021-07-13 20:27:19,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409962812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:19,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853177496] [2021-07-13 20:27:19,896 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 [2021-07-13 20:27:19,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 20:27:19,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:19,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:27:19,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:20,485 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:20,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853177496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:20,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:20,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-13 20:27:20,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651606475] [2021-07-13 20:27:20,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:27:20,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:20,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:27:20,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:27:20,486 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) [2021-07-13 20:27:20,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:20,756 INFO L93 Difference]: Finished difference Result 959 states and 3842 transitions. [2021-07-13 20:27:20,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:27:20,756 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 [2021-07-13 20:27:20,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:20,758 INFO L225 Difference]: With dead ends: 959 [2021-07-13 20:27:20,758 INFO L226 Difference]: Without dead ends: 939 [2021-07-13 20:27:20,758 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 687.8ms TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:27:20,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-07-13 20:27:20,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 920. [2021-07-13 20:27:20,768 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) [2021-07-13 20:27:20,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 3747 transitions. [2021-07-13 20:27:20,770 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 3747 transitions. Word has length 27 [2021-07-13 20:27:20,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:20,770 INFO L482 AbstractCegarLoop]: Abstraction has 920 states and 3747 transitions. [2021-07-13 20:27:20,770 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) [2021-07-13 20:27:20,770 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 3747 transitions. [2021-07-13 20:27:20,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:27:20,772 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:20,772 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:20,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-07-13 20:27:20,972 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:20,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:20,972 INFO L82 PathProgramCache]: Analyzing trace with hash -174588260, now seen corresponding path program 120 times [2021-07-13 20:27:20,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:20,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015623079] [2021-07-13 20:27:20,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:20,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:21,126 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:21,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:21,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015623079] [2021-07-13 20:27:21,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015623079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:21,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371332533] [2021-07-13 20:27:21,127 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:27:21,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 20:27:21,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:21,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:27:21,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:21,679 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:21,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371332533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:21,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:21,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-13 20:27:21,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135953628] [2021-07-13 20:27:21,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:27:21,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:21,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:27:21,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:27:21,680 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) [2021-07-13 20:27:22,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:22,049 INFO L93 Difference]: Finished difference Result 963 states and 3864 transitions. [2021-07-13 20:27:22,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:27:22,049 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 [2021-07-13 20:27:22,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:22,051 INFO L225 Difference]: With dead ends: 963 [2021-07-13 20:27:22,051 INFO L226 Difference]: Without dead ends: 956 [2021-07-13 20:27:22,051 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 711.2ms TimeCoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:27:22,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2021-07-13 20:27:22,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 938. [2021-07-13 20:27:22,061 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) [2021-07-13 20:27:22,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 3794 transitions. [2021-07-13 20:27:22,063 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 3794 transitions. Word has length 27 [2021-07-13 20:27:22,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:22,063 INFO L482 AbstractCegarLoop]: Abstraction has 938 states and 3794 transitions. [2021-07-13 20:27:22,063 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) [2021-07-13 20:27:22,063 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 3794 transitions. [2021-07-13 20:27:22,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:27:22,065 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:22,065 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:22,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable546,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:22,266 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:22,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:22,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1425340330, now seen corresponding path program 121 times [2021-07-13 20:27:22,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:22,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888121548] [2021-07-13 20:27:22,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:22,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:22,403 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:22,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:22,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888121548] [2021-07-13 20:27:22,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888121548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:22,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605158668] [2021-07-13 20:27:22,403 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 [2021-07-13 20:27:22,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:22,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 20:27:22,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:22,805 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 [2021-07-13 20:27:22,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:22,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:22,843 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 [2021-07-13 20:27:22,844 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:22,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:22,878 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 [2021-07-13 20:27:22,879 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:22,882 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 [2021-07-13 20:27:22,883 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:22,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:22,913 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. [2021-07-13 20:27:22,913 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 9 variables, input treesize:107, output treesize:79 [2021-07-13 20:27:23,007 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:23,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605158668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:23,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:23,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-07-13 20:27:23,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130534919] [2021-07-13 20:27:23,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:27:23,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:23,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:27:23,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:27:23,008 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) [2021-07-13 20:27:27,270 WARN L205 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2021-07-13 20:27:31,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:31,622 INFO L93 Difference]: Finished difference Result 3046 states and 12070 transitions. [2021-07-13 20:27:31,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:27:31,623 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 [2021-07-13 20:27:31,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:31,629 INFO L225 Difference]: With dead ends: 3046 [2021-07-13 20:27:31,629 INFO L226 Difference]: Without dead ends: 3001 [2021-07-13 20:27:31,629 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 4743.9ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:27:31,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3001 states. [2021-07-13 20:27:31,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3001 to 1289. [2021-07-13 20:27:31,656 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) [2021-07-13 20:27:31,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 5765 transitions. [2021-07-13 20:27:31,659 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 5765 transitions. Word has length 27 [2021-07-13 20:27:31,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:31,659 INFO L482 AbstractCegarLoop]: Abstraction has 1289 states and 5765 transitions. [2021-07-13 20:27:31,659 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) [2021-07-13 20:27:31,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 5765 transitions. [2021-07-13 20:27:31,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:27:31,661 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:31,661 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:31,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable549 [2021-07-13 20:27:31,861 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:31,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:31,862 INFO L82 PathProgramCache]: Analyzing trace with hash 989899702, now seen corresponding path program 122 times [2021-07-13 20:27:31,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:31,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339879952] [2021-07-13 20:27:31,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:31,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:32,060 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:32,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:32,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339879952] [2021-07-13 20:27:32,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339879952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:32,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971329786] [2021-07-13 20:27:32,060 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 [2021-07-13 20:27:32,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:27:32,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:32,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:27:32,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:32,633 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:32,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971329786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:32,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:32,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-13 20:27:32,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842829573] [2021-07-13 20:27:32,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:27:32,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:32,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:27:32,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:27:32,634 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) [2021-07-13 20:27:33,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:33,091 INFO L93 Difference]: Finished difference Result 1336 states and 5880 transitions. [2021-07-13 20:27:33,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:27:33,092 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 [2021-07-13 20:27:33,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:33,094 INFO L225 Difference]: With dead ends: 1336 [2021-07-13 20:27:33,094 INFO L226 Difference]: Without dead ends: 1318 [2021-07-13 20:27:33,095 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 806.7ms TimeCoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:27:33,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-07-13 20:27:33,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 1292. [2021-07-13 20:27:33,118 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) [2021-07-13 20:27:33,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 5774 transitions. [2021-07-13 20:27:33,121 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 5774 transitions. Word has length 27 [2021-07-13 20:27:33,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:33,121 INFO L482 AbstractCegarLoop]: Abstraction has 1292 states and 5774 transitions. [2021-07-13 20:27:33,121 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) [2021-07-13 20:27:33,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 5774 transitions. [2021-07-13 20:27:33,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:27:33,123 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:33,123 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:33,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable552,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:33,324 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:33,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:33,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1435291434, now seen corresponding path program 123 times [2021-07-13 20:27:33,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:33,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339771363] [2021-07-13 20:27:33,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:33,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:33,470 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:33,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:33,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339771363] [2021-07-13 20:27:33,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339771363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:33,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993283425] [2021-07-13 20:27:33,470 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 [2021-07-13 20:27:33,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:27:33,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:33,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 20:27:33,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:33,790 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 [2021-07-13 20:27:33,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:33,795 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 [2021-07-13 20:27:33,796 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:33,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:33,832 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 [2021-07-13 20:27:33,833 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:33,835 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 [2021-07-13 20:27:33,836 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:33,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:33,866 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. [2021-07-13 20:27:33,866 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:109, output treesize:81 [2021-07-13 20:27:33,970 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:33,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993283425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:33,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:33,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2021-07-13 20:27:33,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191461258] [2021-07-13 20:27:33,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:27:33,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:33,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:27:33,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:27:33,971 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) [2021-07-13 20:27:34,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:34,521 INFO L93 Difference]: Finished difference Result 3442 states and 14583 transitions. [2021-07-13 20:27:34,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:27:34,521 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 [2021-07-13 20:27:34,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:34,545 INFO L225 Difference]: With dead ends: 3442 [2021-07-13 20:27:34,546 INFO L226 Difference]: Without dead ends: 3422 [2021-07-13 20:27:34,546 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 636.0ms TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:27:34,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3422 states. [2021-07-13 20:27:34,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3422 to 1575. [2021-07-13 20:27:34,578 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) [2021-07-13 20:27:34,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 7411 transitions. [2021-07-13 20:27:34,582 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 7411 transitions. Word has length 27 [2021-07-13 20:27:34,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:34,582 INFO L482 AbstractCegarLoop]: Abstraction has 1575 states and 7411 transitions. [2021-07-13 20:27:34,582 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) [2021-07-13 20:27:34,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 7411 transitions. [2021-07-13 20:27:34,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:27:34,585 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:34,585 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:34,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable556,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:34,785 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:34,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:34,786 INFO L82 PathProgramCache]: Analyzing trace with hash -2110098252, now seen corresponding path program 124 times [2021-07-13 20:27:34,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:34,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813380436] [2021-07-13 20:27:34,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:34,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:34,948 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:34,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:34,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813380436] [2021-07-13 20:27:34,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813380436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:34,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738435249] [2021-07-13 20:27:34,948 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 [2021-07-13 20:27:34,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:27:34,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:34,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:27:34,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:35,387 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:35,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738435249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:35,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:35,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-13 20:27:35,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665990221] [2021-07-13 20:27:35,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:27:35,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:35,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:27:35,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:27:35,388 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) [2021-07-13 20:27:35,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:35,754 INFO L93 Difference]: Finished difference Result 1607 states and 7481 transitions. [2021-07-13 20:27:35,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:27:35,754 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 [2021-07-13 20:27:35,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:35,758 INFO L225 Difference]: With dead ends: 1607 [2021-07-13 20:27:35,758 INFO L226 Difference]: Without dead ends: 1593 [2021-07-13 20:27:35,758 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 653.7ms TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:27:35,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2021-07-13 20:27:35,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1572. [2021-07-13 20:27:35,797 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) [2021-07-13 20:27:35,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 7396 transitions. [2021-07-13 20:27:35,801 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 7396 transitions. Word has length 27 [2021-07-13 20:27:35,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:35,801 INFO L482 AbstractCegarLoop]: Abstraction has 1572 states and 7396 transitions. [2021-07-13 20:27:35,801 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) [2021-07-13 20:27:35,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 7396 transitions. [2021-07-13 20:27:35,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:27:35,804 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:35,804 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:36,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2021-07-13 20:27:36,005 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:36,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:36,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1916122616, now seen corresponding path program 125 times [2021-07-13 20:27:36,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:36,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286964719] [2021-07-13 20:27:36,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:36,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:36,177 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:36,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:36,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286964719] [2021-07-13 20:27:36,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286964719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:36,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386262884] [2021-07-13 20:27:36,178 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 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 [2021-07-13 20:27:36,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:27:36,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:36,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:27:36,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:36,786 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:36,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386262884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:36,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:36,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-13 20:27:36,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683846836] [2021-07-13 20:27:36,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:27:36,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:36,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:27:36,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:27:36,787 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) [2021-07-13 20:27:37,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:37,081 INFO L93 Difference]: Finished difference Result 1596 states and 7442 transitions. [2021-07-13 20:27:37,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:27:37,081 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 [2021-07-13 20:27:37,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:37,084 INFO L225 Difference]: With dead ends: 1596 [2021-07-13 20:27:37,084 INFO L226 Difference]: Without dead ends: 1577 [2021-07-13 20:27:37,085 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 680.7ms TimeCoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:27:37,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1577 states. [2021-07-13 20:27:37,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1577 to 1549. [2021-07-13 20:27:37,115 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) [2021-07-13 20:27:37,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1549 states to 1549 states and 7326 transitions. [2021-07-13 20:27:37,119 INFO L78 Accepts]: Start accepts. Automaton has 1549 states and 7326 transitions. Word has length 27 [2021-07-13 20:27:37,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:37,119 INFO L482 AbstractCegarLoop]: Abstraction has 1549 states and 7326 transitions. [2021-07-13 20:27:37,119 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) [2021-07-13 20:27:37,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1549 states and 7326 transitions. [2021-07-13 20:27:37,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:27:37,122 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:37,122 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:37,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable559,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:37,322 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:37,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:37,323 INFO L82 PathProgramCache]: Analyzing trace with hash 2033600990, now seen corresponding path program 126 times [2021-07-13 20:27:37,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:37,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7047496] [2021-07-13 20:27:37,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:37,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:37,499 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:37,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:37,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7047496] [2021-07-13 20:27:37,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7047496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:37,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001030752] [2021-07-13 20:27:37,499 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 [2021-07-13 20:27:37,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:27:37,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:37,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:27:37,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:38,018 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 [2021-07-13 20:27:38,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:38,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:38,064 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 [2021-07-13 20:27:38,065 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:38,068 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 [2021-07-13 20:27:38,069 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:38,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:38,109 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 [2021-07-13 20:27:38,110 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:38,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:38,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 3 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-13 20:27:38,150 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 10 variables, input treesize:133, output treesize:105 [2021-07-13 20:27:38,290 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:27:38,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001030752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:38,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:38,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 23 [2021-07-13 20:27:38,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818919553] [2021-07-13 20:27:38,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:27:38,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:38,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:27:38,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:27:38,291 INFO L87 Difference]: Start difference. First operand 1549 states and 7326 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 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) [2021-07-13 20:27:38,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:38,981 INFO L93 Difference]: Finished difference Result 1650 states and 7580 transitions. [2021-07-13 20:27:38,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:27:38,982 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 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 [2021-07-13 20:27:38,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:38,985 INFO L225 Difference]: With dead ends: 1650 [2021-07-13 20:27:38,985 INFO L226 Difference]: Without dead ends: 1642 [2021-07-13 20:27:38,986 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1068.9ms TimeCoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:27:38,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2021-07-13 20:27:39,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1549. [2021-07-13 20:27:39,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1549 states, 1548 states have (on average 4.715762273901809) internal successors, (7300), 1548 states have internal predecessors, (7300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:39,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1549 states to 1549 states and 7300 transitions. [2021-07-13 20:27:39,010 INFO L78 Accepts]: Start accepts. Automaton has 1549 states and 7300 transitions. Word has length 27 [2021-07-13 20:27:39,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:39,010 INFO L482 AbstractCegarLoop]: Abstraction has 1549 states and 7300 transitions. [2021-07-13 20:27:39,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 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) [2021-07-13 20:27:39,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1549 states and 7300 transitions. [2021-07-13 20:27:39,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:27:39,013 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:39,013 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:39,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable562,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:39,213 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:39,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:39,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1358794172, now seen corresponding path program 127 times [2021-07-13 20:27:39,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:39,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883051479] [2021-07-13 20:27:39,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:39,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:39,373 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:39,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:39,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883051479] [2021-07-13 20:27:39,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883051479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:39,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102474830] [2021-07-13 20:27:39,374 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:39,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:39,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:27:39,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:40,022 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:40,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102474830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:40,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:40,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-13 20:27:40,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192978764] [2021-07-13 20:27:40,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:27:40,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:40,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:27:40,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:27:40,023 INFO L87 Difference]: Start difference. First operand 1549 states and 7300 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) [2021-07-13 20:27:40,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:40,290 INFO L93 Difference]: Finished difference Result 1575 states and 7357 transitions. [2021-07-13 20:27:40,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:27:40,290 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 [2021-07-13 20:27:40,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:40,294 INFO L225 Difference]: With dead ends: 1575 [2021-07-13 20:27:40,294 INFO L226 Difference]: Without dead ends: 1559 [2021-07-13 20:27:40,294 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 719.0ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:27:40,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1559 states. [2021-07-13 20:27:40,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1559 to 1542. [2021-07-13 20:27:40,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1542 states, 1541 states have (on average 4.720960415314731) internal successors, (7275), 1541 states have internal predecessors, (7275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:40,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 7275 transitions. [2021-07-13 20:27:40,316 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 7275 transitions. Word has length 27 [2021-07-13 20:27:40,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:40,316 INFO L482 AbstractCegarLoop]: Abstraction has 1542 states and 7275 transitions. [2021-07-13 20:27:40,316 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) [2021-07-13 20:27:40,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 7275 transitions. [2021-07-13 20:27:40,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:27:40,319 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:40,319 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:40,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable567 [2021-07-13 20:27:40,519 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:40,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:40,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1617589496, now seen corresponding path program 128 times [2021-07-13 20:27:40,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:40,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127907978] [2021-07-13 20:27:40,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:40,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:40,752 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:40,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:40,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127907978] [2021-07-13 20:27:40,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127907978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:40,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123220734] [2021-07-13 20:27:40,752 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:40,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:27:40,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:40,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:27:40,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:41,475 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:41,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123220734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:41,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:41,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-13 20:27:41,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386891173] [2021-07-13 20:27:41,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:27:41,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:41,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:27:41,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:27:41,476 INFO L87 Difference]: Start difference. First operand 1542 states and 7275 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) [2021-07-13 20:27:41,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:41,840 INFO L93 Difference]: Finished difference Result 1472 states and 6714 transitions. [2021-07-13 20:27:41,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:27:41,840 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 [2021-07-13 20:27:41,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:41,843 INFO L225 Difference]: With dead ends: 1472 [2021-07-13 20:27:41,843 INFO L226 Difference]: Without dead ends: 1458 [2021-07-13 20:27:41,843 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 960.7ms TimeCoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:27:41,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2021-07-13 20:27:41,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1437. [2021-07-13 20:27:41,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1437 states, 1436 states have (on average 4.616295264623956) internal successors, (6629), 1436 states have internal predecessors, (6629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:41,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 6629 transitions. [2021-07-13 20:27:41,863 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 6629 transitions. Word has length 27 [2021-07-13 20:27:41,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:41,863 INFO L482 AbstractCegarLoop]: Abstraction has 1437 states and 6629 transitions. [2021-07-13 20:27:41,863 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) [2021-07-13 20:27:41,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 6629 transitions. [2021-07-13 20:27:41,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:27:41,866 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:41,866 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:42,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:42,066 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:42,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:42,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1348843068, now seen corresponding path program 129 times [2021-07-13 20:27:42,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:42,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417229484] [2021-07-13 20:27:42,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:42,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:42,227 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:42,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:42,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417229484] [2021-07-13 20:27:42,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417229484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:42,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949359106] [2021-07-13 20:27:42,228 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:42,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:27:42,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:42,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:27:42,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:42,933 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:42,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949359106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:42,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:42,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-13 20:27:42,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723735288] [2021-07-13 20:27:42,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:27:42,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:42,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:27:42,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:27:42,934 INFO L87 Difference]: Start difference. First operand 1437 states and 6629 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) [2021-07-13 20:27:43,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:43,288 INFO L93 Difference]: Finished difference Result 1273 states and 5538 transitions. [2021-07-13 20:27:43,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:27:43,288 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 [2021-07-13 20:27:43,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:43,291 INFO L225 Difference]: With dead ends: 1273 [2021-07-13 20:27:43,291 INFO L226 Difference]: Without dead ends: 1251 [2021-07-13 20:27:43,291 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 836.4ms TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:27:43,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2021-07-13 20:27:43,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1232. [2021-07-13 20:27:43,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1231 states have (on average 4.418359057676685) internal successors, (5439), 1231 states have internal predecessors, (5439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:43,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 5439 transitions. [2021-07-13 20:27:43,308 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 5439 transitions. Word has length 27 [2021-07-13 20:27:43,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:43,308 INFO L482 AbstractCegarLoop]: Abstraction has 1232 states and 5439 transitions. [2021-07-13 20:27:43,308 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) [2021-07-13 20:27:43,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 5439 transitions. [2021-07-13 20:27:43,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:27:43,310 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:43,310 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:43,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable576 [2021-07-13 20:27:43,510 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:43,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:43,511 INFO L82 PathProgramCache]: Analyzing trace with hash -133551674, now seen corresponding path program 130 times [2021-07-13 20:27:43,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:43,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813861782] [2021-07-13 20:27:43,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:43,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:43,668 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:43,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:43,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813861782] [2021-07-13 20:27:43,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813861782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:43,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963797410] [2021-07-13 20:27:43,668 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:43,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:27:43,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:43,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 20:27:43,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:43,966 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 [2021-07-13 20:27:43,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:43,970 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 [2021-07-13 20:27:43,971 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:44,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:44,009 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 [2021-07-13 20:27:44,010 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:44,014 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 [2021-07-13 20:27:44,015 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:44,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:44,045 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. [2021-07-13 20:27:44,045 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:109, output treesize:81 [2021-07-13 20:27:44,147 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:44,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963797410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:44,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:44,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 22 [2021-07-13 20:27:44,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752588863] [2021-07-13 20:27:44,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:27:44,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:44,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:27:44,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:27:44,148 INFO L87 Difference]: Start difference. First operand 1232 states and 5439 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) [2021-07-13 20:27:44,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:44,640 INFO L93 Difference]: Finished difference Result 2587 states and 10394 transitions. [2021-07-13 20:27:44,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:27:44,640 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 [2021-07-13 20:27:44,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:44,646 INFO L225 Difference]: With dead ends: 2587 [2021-07-13 20:27:44,646 INFO L226 Difference]: Without dead ends: 2542 [2021-07-13 20:27:44,646 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 591.1ms TimeCoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:27:44,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2021-07-13 20:27:44,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 1419. [2021-07-13 20:27:44,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 4.562059238363893) internal successors, (6469), 1418 states have internal predecessors, (6469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:44,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 6469 transitions. [2021-07-13 20:27:44,674 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 6469 transitions. Word has length 27 [2021-07-13 20:27:44,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:44,674 INFO L482 AbstractCegarLoop]: Abstraction has 1419 states and 6469 transitions. [2021-07-13 20:27:44,674 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) [2021-07-13 20:27:44,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 6469 transitions. [2021-07-13 20:27:44,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:27:44,676 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:44,676 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:44,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable582,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:44,877 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:44,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:44,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1158265598, now seen corresponding path program 131 times [2021-07-13 20:27:44,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:44,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647650864] [2021-07-13 20:27:44,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:44,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:45,046 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:45,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:45,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647650864] [2021-07-13 20:27:45,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647650864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:45,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232659005] [2021-07-13 20:27:45,047 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:45,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:27:45,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:45,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:27:45,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:45,734 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:45,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232659005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:45,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:45,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-13 20:27:45,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627107692] [2021-07-13 20:27:45,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:27:45,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:45,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:27:45,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:27:45,735 INFO L87 Difference]: Start difference. First operand 1419 states and 6469 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) [2021-07-13 20:27:45,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:45,900 INFO L93 Difference]: Finished difference Result 1448 states and 6542 transitions. [2021-07-13 20:27:45,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:27:45,901 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 [2021-07-13 20:27:45,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:45,904 INFO L225 Difference]: With dead ends: 1448 [2021-07-13 20:27:45,904 INFO L226 Difference]: Without dead ends: 1440 [2021-07-13 20:27:45,904 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 685.3ms TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:27:45,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2021-07-13 20:27:45,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 1417. [2021-07-13 20:27:45,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1417 states, 1416 states have (on average 4.562146892655368) internal successors, (6460), 1416 states have internal predecessors, (6460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:45,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1417 states to 1417 states and 6460 transitions. [2021-07-13 20:27:45,923 INFO L78 Accepts]: Start accepts. Automaton has 1417 states and 6460 transitions. Word has length 27 [2021-07-13 20:27:45,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:45,923 INFO L482 AbstractCegarLoop]: Abstraction has 1417 states and 6460 transitions. [2021-07-13 20:27:45,924 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) [2021-07-13 20:27:45,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1417 states and 6460 transitions. [2021-07-13 20:27:45,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:27:45,926 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:45,926 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:46,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable584 [2021-07-13 20:27:46,129 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:46,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:46,129 INFO L82 PathProgramCache]: Analyzing trace with hash -664653662, now seen corresponding path program 132 times [2021-07-13 20:27:46,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:46,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761166327] [2021-07-13 20:27:46,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:46,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:46,264 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:27:46,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:46,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761166327] [2021-07-13 20:27:46,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761166327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:46,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523368698] [2021-07-13 20:27:46,264 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:46,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:27:46,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:46,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:27:46,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:46,873 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 [2021-07-13 20:27:46,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:46,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:46,892 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 [2021-07-13 20:27:46,893 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:46,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:46,906 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. [2021-07-13 20:27:46,906 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:58, output treesize:44 [2021-07-13 20:27:46,957 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:46,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523368698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:46,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:46,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 23 [2021-07-13 20:27:46,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304288744] [2021-07-13 20:27:46,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:27:46,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:46,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:27:46,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:27:46,958 INFO L87 Difference]: Start difference. First operand 1417 states and 6460 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 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) [2021-07-13 20:27:47,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:47,296 INFO L93 Difference]: Finished difference Result 1648 states and 7113 transitions. [2021-07-13 20:27:47,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:27:47,297 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 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 [2021-07-13 20:27:47,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:47,300 INFO L225 Difference]: With dead ends: 1648 [2021-07-13 20:27:47,300 INFO L226 Difference]: Without dead ends: 1628 [2021-07-13 20:27:47,300 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 750.6ms TimeCoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:27:47,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2021-07-13 20:27:47,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 1436. [2021-07-13 20:27:47,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 4.559581881533101) internal successors, (6543), 1435 states have internal predecessors, (6543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:47,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 6543 transitions. [2021-07-13 20:27:47,336 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 6543 transitions. Word has length 27 [2021-07-13 20:27:47,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:47,336 INFO L482 AbstractCegarLoop]: Abstraction has 1436 states and 6543 transitions. [2021-07-13 20:27:47,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 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) [2021-07-13 20:27:47,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 6543 transitions. [2021-07-13 20:27:47,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:27:47,338 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:47,339 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:47,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable589,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:47,539 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:47,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:47,540 INFO L82 PathProgramCache]: Analyzing trace with hash -267499616, now seen corresponding path program 133 times [2021-07-13 20:27:47,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:47,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400235250] [2021-07-13 20:27:47,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:47,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:47,724 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:47,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:47,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400235250] [2021-07-13 20:27:47,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400235250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:47,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939697642] [2021-07-13 20:27:47,724 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:47,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:47,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:27:47,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:48,475 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:48,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939697642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:48,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:48,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-13 20:27:48,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177457869] [2021-07-13 20:27:48,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:27:48,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:48,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:27:48,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:27:48,476 INFO L87 Difference]: Start difference. First operand 1436 states and 6543 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) [2021-07-13 20:27:49,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:49,026 INFO L93 Difference]: Finished difference Result 1480 states and 6651 transitions. [2021-07-13 20:27:49,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:27:49,026 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 [2021-07-13 20:27:49,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:49,029 INFO L225 Difference]: With dead ends: 1480 [2021-07-13 20:27:49,029 INFO L226 Difference]: Without dead ends: 1464 [2021-07-13 20:27:49,029 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1049.7ms TimeCoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:27:49,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2021-07-13 20:27:49,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1441. [2021-07-13 20:27:49,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 1440 states have (on average 4.552777777777778) internal successors, (6556), 1440 states have internal predecessors, (6556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:49,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 6556 transitions. [2021-07-13 20:27:49,049 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 6556 transitions. Word has length 27 [2021-07-13 20:27:49,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:49,049 INFO L482 AbstractCegarLoop]: Abstraction has 1441 states and 6556 transitions. [2021-07-13 20:27:49,049 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) [2021-07-13 20:27:49,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 6556 transitions. [2021-07-13 20:27:49,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:27:49,051 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:49,052 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:49,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:49,252 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:49,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:49,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1700897470, now seen corresponding path program 134 times [2021-07-13 20:27:49,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:49,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847737312] [2021-07-13 20:27:49,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:49,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:49,457 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:49,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:49,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847737312] [2021-07-13 20:27:49,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847737312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:49,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178392221] [2021-07-13 20:27:49,458 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:49,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:27:49,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:49,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:27:49,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:50,157 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:50,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178392221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:50,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:50,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-13 20:27:50,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80036030] [2021-07-13 20:27:50,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:27:50,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:50,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:27:50,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:27:50,158 INFO L87 Difference]: Start difference. First operand 1441 states and 6556 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) [2021-07-13 20:27:50,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:50,636 INFO L93 Difference]: Finished difference Result 1485 states and 6664 transitions. [2021-07-13 20:27:50,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:27:50,636 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 [2021-07-13 20:27:50,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:50,639 INFO L225 Difference]: With dead ends: 1485 [2021-07-13 20:27:50,639 INFO L226 Difference]: Without dead ends: 1469 [2021-07-13 20:27:50,640 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 937.5ms TimeCoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:27:50,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1469 states. [2021-07-13 20:27:50,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1469 to 1441. [2021-07-13 20:27:50,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 1440 states have (on average 4.551388888888889) internal successors, (6554), 1440 states have internal predecessors, (6554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:50,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 6554 transitions. [2021-07-13 20:27:50,660 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 6554 transitions. Word has length 27 [2021-07-13 20:27:50,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:50,660 INFO L482 AbstractCegarLoop]: Abstraction has 1441 states and 6554 transitions. [2021-07-13 20:27:50,661 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) [2021-07-13 20:27:50,661 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 6554 transitions. [2021-07-13 20:27:50,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:27:50,663 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:50,663 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:50,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-07-13 20:27:50,868 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:50,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:50,869 INFO L82 PathProgramCache]: Analyzing trace with hash -724293666, now seen corresponding path program 135 times [2021-07-13 20:27:50,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:50,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829623839] [2021-07-13 20:27:50,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:50,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:51,013 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:51,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:51,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829623839] [2021-07-13 20:27:51,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829623839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:51,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274954365] [2021-07-13 20:27:51,014 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:51,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:27:51,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:51,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 20:27:51,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:51,317 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 [2021-07-13 20:27:51,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:51,322 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 [2021-07-13 20:27:51,323 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:51,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:51,354 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 [2021-07-13 20:27:51,355 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:51,358 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 [2021-07-13 20:27:51,359 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:51,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:51,385 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. [2021-07-13 20:27:51,385 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:99, output treesize:71 [2021-07-13 20:27:51,489 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:27:51,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274954365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:51,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:51,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2021-07-13 20:27:51,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135738510] [2021-07-13 20:27:51,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:27:51,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:51,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:27:51,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:27:51,490 INFO L87 Difference]: Start difference. First operand 1441 states and 6554 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 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) [2021-07-13 20:27:52,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:52,260 INFO L93 Difference]: Finished difference Result 2434 states and 10147 transitions. [2021-07-13 20:27:52,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:27:52,261 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 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 [2021-07-13 20:27:52,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:52,266 INFO L225 Difference]: With dead ends: 2434 [2021-07-13 20:27:52,266 INFO L226 Difference]: Without dead ends: 2415 [2021-07-13 20:27:52,267 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 705.0ms TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:27:52,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-07-13 20:27:52,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 1570. [2021-07-13 20:27:52,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1569 states have (on average 4.625239005736137) internal successors, (7257), 1569 states have internal predecessors, (7257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:52,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 7257 transitions. [2021-07-13 20:27:52,295 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 7257 transitions. Word has length 27 [2021-07-13 20:27:52,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:52,296 INFO L482 AbstractCegarLoop]: Abstraction has 1570 states and 7257 transitions. [2021-07-13 20:27:52,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 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) [2021-07-13 20:27:52,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 7257 transitions. [2021-07-13 20:27:52,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:27:52,298 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:52,298 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:52,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-07-13 20:27:52,499 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:52,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:52,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1399100484, now seen corresponding path program 136 times [2021-07-13 20:27:52,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:52,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938600222] [2021-07-13 20:27:52,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:52,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:52,669 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:52,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:52,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938600222] [2021-07-13 20:27:52,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938600222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:52,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048002850] [2021-07-13 20:27:52,670 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:52,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:27:52,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:52,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:27:52,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:53,259 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:53,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048002850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:53,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:53,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-13 20:27:53,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810394455] [2021-07-13 20:27:53,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:27:53,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:53,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:27:53,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:27:53,260 INFO L87 Difference]: Start difference. First operand 1570 states and 7257 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) [2021-07-13 20:27:53,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:53,638 INFO L93 Difference]: Finished difference Result 1530 states and 6921 transitions. [2021-07-13 20:27:53,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:27:53,638 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 [2021-07-13 20:27:53,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:53,641 INFO L225 Difference]: With dead ends: 1530 [2021-07-13 20:27:53,641 INFO L226 Difference]: Without dead ends: 1516 [2021-07-13 20:27:53,641 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 791.8ms TimeCoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:27:53,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2021-07-13 20:27:53,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1499. [2021-07-13 20:27:53,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1498 states have (on average 4.568758344459279) internal successors, (6844), 1498 states have internal predecessors, (6844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:53,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 6844 transitions. [2021-07-13 20:27:53,662 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 6844 transitions. Word has length 27 [2021-07-13 20:27:53,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:53,662 INFO L482 AbstractCegarLoop]: Abstraction has 1499 states and 6844 transitions. [2021-07-13 20:27:53,663 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) [2021-07-13 20:27:53,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 6844 transitions. [2021-07-13 20:27:53,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:27:53,665 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:53,665 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:53,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable603 [2021-07-13 20:27:53,865 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:53,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:53,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1667846912, now seen corresponding path program 137 times [2021-07-13 20:27:53,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:53,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643814503] [2021-07-13 20:27:53,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:53,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:54,034 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:54,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:54,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643814503] [2021-07-13 20:27:54,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643814503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:54,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67362620] [2021-07-13 20:27:54,035 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:54,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:27:54,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:54,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:27:54,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:54,684 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:54,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67362620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:54,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:54,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-13 20:27:54,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746608124] [2021-07-13 20:27:54,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:27:54,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:54,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:27:54,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:27:54,685 INFO L87 Difference]: Start difference. First operand 1499 states and 6844 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) [2021-07-13 20:27:54,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:54,866 INFO L93 Difference]: Finished difference Result 1529 states and 6905 transitions. [2021-07-13 20:27:54,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:27:54,866 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 [2021-07-13 20:27:54,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:54,869 INFO L225 Difference]: With dead ends: 1529 [2021-07-13 20:27:54,869 INFO L226 Difference]: Without dead ends: 1511 [2021-07-13 20:27:54,869 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 656.0ms TimeCoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:27:54,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1511 states. [2021-07-13 20:27:54,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1511 to 1483. [2021-07-13 20:27:54,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1482 states have (on average 4.582321187584346) internal successors, (6791), 1482 states have internal predecessors, (6791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:54,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 6791 transitions. [2021-07-13 20:27:54,890 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 6791 transitions. Word has length 27 [2021-07-13 20:27:54,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:54,890 INFO L482 AbstractCegarLoop]: Abstraction has 1483 states and 6791 transitions. [2021-07-13 20:27:54,890 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) [2021-07-13 20:27:54,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 6791 transitions. [2021-07-13 20:27:54,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:27:54,892 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:54,892 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:55,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable606,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:55,093 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:55,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:55,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1070450466, now seen corresponding path program 138 times [2021-07-13 20:27:55,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:55,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172369840] [2021-07-13 20:27:55,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:55,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:55,219 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:27:55,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:55,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172369840] [2021-07-13 20:27:55,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172369840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:55,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185301285] [2021-07-13 20:27:55,220 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:55,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:27:55,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:55,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:27:55,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:55,840 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 [2021-07-13 20:27:55,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:55,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:55,857 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 [2021-07-13 20:27:55,858 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:55,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:55,871 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. [2021-07-13 20:27:55,871 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:58, output treesize:44 [2021-07-13 20:27:55,924 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:55,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185301285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:55,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:55,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 23 [2021-07-13 20:27:55,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529949195] [2021-07-13 20:27:55,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:27:55,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:55,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:27:55,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:27:55,925 INFO L87 Difference]: Start difference. First operand 1483 states and 6791 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 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) [2021-07-13 20:27:56,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:56,347 INFO L93 Difference]: Finished difference Result 2432 states and 10217 transitions. [2021-07-13 20:27:56,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:27:56,348 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 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 [2021-07-13 20:27:56,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:56,354 INFO L225 Difference]: With dead ends: 2432 [2021-07-13 20:27:56,354 INFO L226 Difference]: Without dead ends: 2404 [2021-07-13 20:27:56,354 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 774.4ms TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:27:56,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2021-07-13 20:27:56,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 1620. [2021-07-13 20:27:56,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1619 states have (on average 4.625077208153181) internal successors, (7488), 1619 states have internal predecessors, (7488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:56,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 7488 transitions. [2021-07-13 20:27:56,386 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 7488 transitions. Word has length 27 [2021-07-13 20:27:56,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:56,387 INFO L482 AbstractCegarLoop]: Abstraction has 1620 states and 7488 transitions. [2021-07-13 20:27:56,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 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) [2021-07-13 20:27:56,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 7488 transitions. [2021-07-13 20:27:56,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:27:56,390 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:56,390 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:56,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable611 [2021-07-13 20:27:56,590 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:56,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:56,590 INFO L82 PathProgramCache]: Analyzing trace with hash 175326052, now seen corresponding path program 139 times [2021-07-13 20:27:56,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:56,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303878206] [2021-07-13 20:27:56,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:56,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:56,769 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:56,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:56,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303878206] [2021-07-13 20:27:56,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303878206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:56,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285847143] [2021-07-13 20:27:56,769 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:56,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:56,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:27:56,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:57,486 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:57,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285847143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:57,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:57,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-13 20:27:57,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954337457] [2021-07-13 20:27:57,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:27:57,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:57,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:27:57,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:27:57,487 INFO L87 Difference]: Start difference. First operand 1620 states and 7488 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) [2021-07-13 20:27:58,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:58,064 INFO L93 Difference]: Finished difference Result 1647 states and 7547 transitions. [2021-07-13 20:27:58,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:27:58,065 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 [2021-07-13 20:27:58,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:58,068 INFO L225 Difference]: With dead ends: 1647 [2021-07-13 20:27:58,068 INFO L226 Difference]: Without dead ends: 1633 [2021-07-13 20:27:58,068 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1057.0ms TimeCoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:27:58,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1633 states. [2021-07-13 20:27:58,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1633 to 1612. [2021-07-13 20:27:58,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1612 states, 1611 states have (on average 4.631905648665425) internal successors, (7462), 1611 states have internal predecessors, (7462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:58,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 7462 transitions. [2021-07-13 20:27:58,092 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 7462 transitions. Word has length 27 [2021-07-13 20:27:58,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:58,092 INFO L482 AbstractCegarLoop]: Abstraction has 1612 states and 7462 transitions. [2021-07-13 20:27:58,092 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) [2021-07-13 20:27:58,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 7462 transitions. [2021-07-13 20:27:58,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:27:58,095 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:58,095 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:58,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable616,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:58,297 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:58,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:58,297 INFO L82 PathProgramCache]: Analyzing trace with hash -673296420, now seen corresponding path program 140 times [2021-07-13 20:27:58,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:58,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811741701] [2021-07-13 20:27:58,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:58,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:58,574 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:58,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:58,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811741701] [2021-07-13 20:27:58,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811741701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:58,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64471944] [2021-07-13 20:27:58,575 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:58,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:27:58,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:58,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:27:58,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:59,136 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:59,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64471944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:59,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:59,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-13 20:27:59,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882528152] [2021-07-13 20:27:59,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:27:59,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:59,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:27:59,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:27:59,137 INFO L87 Difference]: Start difference. First operand 1612 states and 7462 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) [2021-07-13 20:27:59,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:59,645 INFO L93 Difference]: Finished difference Result 1632 states and 7497 transitions. [2021-07-13 20:27:59,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:27:59,645 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 [2021-07-13 20:27:59,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:59,649 INFO L225 Difference]: With dead ends: 1632 [2021-07-13 20:27:59,649 INFO L226 Difference]: Without dead ends: 1614 [2021-07-13 20:27:59,649 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 896.6ms TimeCoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:27:59,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-07-13 20:27:59,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1586. [2021-07-13 20:27:59,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1586 states, 1585 states have (on average 4.6574132492113565) internal successors, (7382), 1585 states have internal predecessors, (7382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:59,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1586 states to 1586 states and 7382 transitions. [2021-07-13 20:27:59,673 INFO L78 Accepts]: Start accepts. Automaton has 1586 states and 7382 transitions. Word has length 27 [2021-07-13 20:27:59,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:59,673 INFO L482 AbstractCegarLoop]: Abstraction has 1586 states and 7382 transitions. [2021-07-13 20:27:59,673 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) [2021-07-13 20:27:59,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1586 states and 7382 transitions. [2021-07-13 20:27:59,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:27:59,676 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:59,676 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:59,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable622,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:59,877 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:59,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:59,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1068054097, now seen corresponding path program 141 times [2021-07-13 20:27:59,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:59,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468590972] [2021-07-13 20:27:59,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:59,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:00,087 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:00,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:00,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468590972] [2021-07-13 20:28:00,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468590972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:00,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761366123] [2021-07-13 20:28:00,088 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:00,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:28:00,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:00,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:28:00,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:01,017 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:01,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761366123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:01,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:01,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-07-13 20:28:01,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923261577] [2021-07-13 20:28:01,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:28:01,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:01,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:28:01,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:28:01,018 INFO L87 Difference]: Start difference. First operand 1586 states and 7382 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:01,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:01,594 INFO L93 Difference]: Finished difference Result 1626 states and 7470 transitions. [2021-07-13 20:28:01,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:28:01,594 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:28:01,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:01,597 INFO L225 Difference]: With dead ends: 1626 [2021-07-13 20:28:01,598 INFO L226 Difference]: Without dead ends: 1622 [2021-07-13 20:28:01,598 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1329.8ms TimeCoverageRelationStatistics Valid=120, Invalid=1212, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:28:01,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-07-13 20:28:01,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1600. [2021-07-13 20:28:01,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 4.632895559724828) internal successors, (7408), 1599 states have internal predecessors, (7408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:01,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 7408 transitions. [2021-07-13 20:28:01,621 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 7408 transitions. Word has length 28 [2021-07-13 20:28:01,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:01,621 INFO L482 AbstractCegarLoop]: Abstraction has 1600 states and 7408 transitions. [2021-07-13 20:28:01,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:01,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 7408 transitions. [2021-07-13 20:28:01,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:28:01,624 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:01,624 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:01,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable625,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:01,825 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:01,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:01,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1313380425, now seen corresponding path program 142 times [2021-07-13 20:28:01,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:01,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638266087] [2021-07-13 20:28:01,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:01,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:02,156 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:02,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:02,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638266087] [2021-07-13 20:28:02,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638266087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:02,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577506218] [2021-07-13 20:28:02,156 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:02,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:28:02,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:02,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:28:02,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:02,703 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-07-13 20:28:03,026 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:03,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577506218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:03,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:03,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-07-13 20:28:03,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433017194] [2021-07-13 20:28:03,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:28:03,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:03,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:28:03,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:28:03,027 INFO L87 Difference]: Start difference. First operand 1600 states and 7408 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:03,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:03,661 INFO L93 Difference]: Finished difference Result 1634 states and 7482 transitions. [2021-07-13 20:28:03,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:28:03,661 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:28:03,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:03,664 INFO L225 Difference]: With dead ends: 1634 [2021-07-13 20:28:03,665 INFO L226 Difference]: Without dead ends: 1630 [2021-07-13 20:28:03,665 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1364.4ms TimeCoverageRelationStatistics Valid=124, Invalid=1208, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:28:03,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2021-07-13 20:28:03,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 1604. [2021-07-13 20:28:03,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1603 states have (on average 4.625077978789769) internal successors, (7414), 1603 states have internal predecessors, (7414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:03,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 7414 transitions. [2021-07-13 20:28:03,688 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 7414 transitions. Word has length 28 [2021-07-13 20:28:03,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:03,688 INFO L482 AbstractCegarLoop]: Abstraction has 1604 states and 7414 transitions. [2021-07-13 20:28:03,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:03,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 7414 transitions. [2021-07-13 20:28:03,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:28:03,692 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:03,692 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:03,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable630,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:03,892 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:03,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:03,893 INFO L82 PathProgramCache]: Analyzing trace with hash 775887569, now seen corresponding path program 143 times [2021-07-13 20:28:03,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:03,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017114729] [2021-07-13 20:28:03,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:03,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:04,206 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:04,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:04,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017114729] [2021-07-13 20:28:04,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017114729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:04,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854919073] [2021-07-13 20:28:04,207 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:04,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:28:04,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:04,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:28:04,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:04,762 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-07-13 20:28:05,232 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:05,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854919073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:05,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:05,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-07-13 20:28:05,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206792070] [2021-07-13 20:28:05,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:28:05,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:05,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:28:05,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:28:05,233 INFO L87 Difference]: Start difference. First operand 1604 states and 7414 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:05,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:05,715 INFO L93 Difference]: Finished difference Result 1651 states and 7525 transitions. [2021-07-13 20:28:05,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:28:05,716 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:28:05,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:05,721 INFO L225 Difference]: With dead ends: 1651 [2021-07-13 20:28:05,721 INFO L226 Difference]: Without dead ends: 1647 [2021-07-13 20:28:05,721 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1303.8ms TimeCoverageRelationStatistics Valid=149, Invalid=1041, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:28:05,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-07-13 20:28:05,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1616. [2021-07-13 20:28:05,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1616 states, 1615 states have (on average 4.610526315789474) internal successors, (7446), 1615 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:05,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 7446 transitions. [2021-07-13 20:28:05,757 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 7446 transitions. Word has length 28 [2021-07-13 20:28:05,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:05,757 INFO L482 AbstractCegarLoop]: Abstraction has 1616 states and 7446 transitions. [2021-07-13 20:28:05,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:05,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 7446 transitions. [2021-07-13 20:28:05,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:28:05,761 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:05,761 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:05,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable634 [2021-07-13 20:28:05,962 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:05,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:05,962 INFO L82 PathProgramCache]: Analyzing trace with hash -72733363, now seen corresponding path program 144 times [2021-07-13 20:28:05,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:05,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144109328] [2021-07-13 20:28:05,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:05,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:06,202 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:06,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:06,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144109328] [2021-07-13 20:28:06,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144109328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:06,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828374370] [2021-07-13 20:28:06,202 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:06,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:28:06,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:06,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:28:06,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:06,972 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:06,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828374370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:06,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:06,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-07-13 20:28:06,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018605628] [2021-07-13 20:28:06,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:28:06,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:06,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:28:06,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=740, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:28:06,973 INFO L87 Difference]: Start difference. First operand 1616 states and 7446 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:07,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:07,884 INFO L93 Difference]: Finished difference Result 1651 states and 7525 transitions. [2021-07-13 20:28:07,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:28:07,884 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:28:07,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:07,888 INFO L225 Difference]: With dead ends: 1651 [2021-07-13 20:28:07,888 INFO L226 Difference]: Without dead ends: 1647 [2021-07-13 20:28:07,889 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1459.9ms TimeCoverageRelationStatistics Valid=137, Invalid=1503, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:28:07,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-07-13 20:28:07,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1617. [2021-07-13 20:28:07,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1617 states, 1616 states have (on average 4.608292079207921) internal successors, (7447), 1616 states have internal predecessors, (7447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:07,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 7447 transitions. [2021-07-13 20:28:07,929 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 7447 transitions. Word has length 28 [2021-07-13 20:28:07,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:07,929 INFO L482 AbstractCegarLoop]: Abstraction has 1617 states and 7447 transitions. [2021-07-13 20:28:07,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:07,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 7447 transitions. [2021-07-13 20:28:07,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:28:07,933 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:07,933 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:08,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable641 [2021-07-13 20:28:08,134 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:08,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:08,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1666655091, now seen corresponding path program 145 times [2021-07-13 20:28:08,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:08,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081894056] [2021-07-13 20:28:08,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:08,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:08,426 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:08,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:08,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081894056] [2021-07-13 20:28:08,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081894056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:08,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980340457] [2021-07-13 20:28:08,426 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:08,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:08,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:28:08,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:08,937 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-07-13 20:28:09,232 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:09,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980340457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:09,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:09,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-07-13 20:28:09,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567346677] [2021-07-13 20:28:09,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:28:09,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:09,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:28:09,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:28:09,234 INFO L87 Difference]: Start difference. First operand 1617 states and 7447 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:09,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:09,911 INFO L93 Difference]: Finished difference Result 1661 states and 7546 transitions. [2021-07-13 20:28:09,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:28:09,912 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:28:09,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:09,915 INFO L225 Difference]: With dead ends: 1661 [2021-07-13 20:28:09,915 INFO L226 Difference]: Without dead ends: 1657 [2021-07-13 20:28:09,915 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1264.7ms TimeCoverageRelationStatistics Valid=174, Invalid=1232, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:28:09,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2021-07-13 20:28:09,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1613. [2021-07-13 20:28:09,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1612 states have (on average 4.61166253101737) internal successors, (7434), 1612 states have internal predecessors, (7434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:09,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 7434 transitions. [2021-07-13 20:28:09,938 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 7434 transitions. Word has length 28 [2021-07-13 20:28:09,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:09,938 INFO L482 AbstractCegarLoop]: Abstraction has 1613 states and 7434 transitions. [2021-07-13 20:28:09,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:09,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 7434 transitions. [2021-07-13 20:28:09,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:28:09,941 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:09,941 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:10,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable643 [2021-07-13 20:28:10,142 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:10,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:10,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1997787763, now seen corresponding path program 146 times [2021-07-13 20:28:10,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:10,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623303091] [2021-07-13 20:28:10,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:10,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:10,387 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:10,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:10,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623303091] [2021-07-13 20:28:10,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623303091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:10,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957725541] [2021-07-13 20:28:10,387 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:10,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:28:10,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:10,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:28:10,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:10,970 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-07-13 20:28:11,406 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:11,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957725541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:11,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:11,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-07-13 20:28:11,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157506712] [2021-07-13 20:28:11,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:28:11,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:11,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:28:11,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:28:11,407 INFO L87 Difference]: Start difference. First operand 1613 states and 7434 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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) [2021-07-13 20:28:11,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:11,922 INFO L93 Difference]: Finished difference Result 1648 states and 7509 transitions. [2021-07-13 20:28:11,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:28:11,922 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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 28 [2021-07-13 20:28:11,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:11,925 INFO L225 Difference]: With dead ends: 1648 [2021-07-13 20:28:11,926 INFO L226 Difference]: Without dead ends: 1644 [2021-07-13 20:28:11,926 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1331.8ms TimeCoverageRelationStatistics Valid=102, Invalid=1020, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:28:11,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2021-07-13 20:28:11,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1618. [2021-07-13 20:28:11,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1617 states have (on average 4.6017316017316015) internal successors, (7441), 1617 states have internal predecessors, (7441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:11,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 7441 transitions. [2021-07-13 20:28:11,949 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 7441 transitions. Word has length 28 [2021-07-13 20:28:11,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:11,949 INFO L482 AbstractCegarLoop]: Abstraction has 1618 states and 7441 transitions. [2021-07-13 20:28:11,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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) [2021-07-13 20:28:11,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 7441 transitions. [2021-07-13 20:28:11,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:28:11,952 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:11,952 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:12,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable646,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:12,153 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:12,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:12,153 INFO L82 PathProgramCache]: Analyzing trace with hash -2038384209, now seen corresponding path program 147 times [2021-07-13 20:28:12,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:12,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094945159] [2021-07-13 20:28:12,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:12,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:12,367 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:12,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:12,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094945159] [2021-07-13 20:28:12,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094945159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:12,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748358025] [2021-07-13 20:28:12,368 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:12,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 20:28:12,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:12,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:28:12,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:12,868 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-07-13 20:28:13,275 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:13,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748358025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:13,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:13,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-07-13 20:28:13,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060133565] [2021-07-13 20:28:13,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:28:13,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:13,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:28:13,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:28:13,276 INFO L87 Difference]: Start difference. First operand 1618 states and 7441 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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) [2021-07-13 20:28:13,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:13,742 INFO L93 Difference]: Finished difference Result 1653 states and 7516 transitions. [2021-07-13 20:28:13,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:28:13,742 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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 28 [2021-07-13 20:28:13,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:13,746 INFO L225 Difference]: With dead ends: 1653 [2021-07-13 20:28:13,746 INFO L226 Difference]: Without dead ends: 1649 [2021-07-13 20:28:13,746 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1131.0ms TimeCoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:28:13,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2021-07-13 20:28:13,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1617. [2021-07-13 20:28:13,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1617 states, 1616 states have (on average 4.600866336633663) internal successors, (7435), 1616 states have internal predecessors, (7435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:13,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 7435 transitions. [2021-07-13 20:28:13,769 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 7435 transitions. Word has length 28 [2021-07-13 20:28:13,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:13,769 INFO L482 AbstractCegarLoop]: Abstraction has 1617 states and 7435 transitions. [2021-07-13 20:28:13,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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) [2021-07-13 20:28:13,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 7435 transitions. [2021-07-13 20:28:13,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:28:13,772 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:13,772 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:13,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable650,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:13,973 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:13,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:13,973 INFO L82 PathProgramCache]: Analyzing trace with hash 232467601, now seen corresponding path program 148 times [2021-07-13 20:28:13,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:13,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712413986] [2021-07-13 20:28:13,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:13,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:14,225 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:14,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:14,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712413986] [2021-07-13 20:28:14,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712413986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:14,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585909592] [2021-07-13 20:28:14,225 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:14,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:28:14,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:14,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:28:14,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:14,732 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-07-13 20:28:15,109 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:15,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585909592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:15,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:15,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-07-13 20:28:15,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884861920] [2021-07-13 20:28:15,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:28:15,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:15,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:28:15,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:28:15,110 INFO L87 Difference]: Start difference. First operand 1617 states and 7435 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:15,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:15,592 INFO L93 Difference]: Finished difference Result 1656 states and 7522 transitions. [2021-07-13 20:28:15,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:28:15,592 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:28:15,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:15,595 INFO L225 Difference]: With dead ends: 1656 [2021-07-13 20:28:15,596 INFO L226 Difference]: Without dead ends: 1652 [2021-07-13 20:28:15,596 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1215.6ms TimeCoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:28:15,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2021-07-13 20:28:15,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 1622. [2021-07-13 20:28:15,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 4.592227020357804) internal successors, (7444), 1621 states have internal predecessors, (7444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:15,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 7444 transitions. [2021-07-13 20:28:15,619 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 7444 transitions. Word has length 28 [2021-07-13 20:28:15,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:15,619 INFO L482 AbstractCegarLoop]: Abstraction has 1622 states and 7444 transitions. [2021-07-13 20:28:15,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:15,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 7444 transitions. [2021-07-13 20:28:15,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:28:15,622 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:15,622 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:15,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable655 [2021-07-13 20:28:15,837 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:15,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:15,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1971856055, now seen corresponding path program 149 times [2021-07-13 20:28:15,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:15,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432571392] [2021-07-13 20:28:15,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:15,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:16,063 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:16,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:16,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432571392] [2021-07-13 20:28:16,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432571392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:16,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852201126] [2021-07-13 20:28:16,064 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:16,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 20:28:16,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:16,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:28:16,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:16,614 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-07-13 20:28:16,784 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2021-07-13 20:28:17,122 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:17,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852201126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:17,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:17,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-07-13 20:28:17,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797766434] [2021-07-13 20:28:17,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:28:17,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:17,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:28:17,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:28:17,123 INFO L87 Difference]: Start difference. First operand 1622 states and 7444 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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) [2021-07-13 20:28:17,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:17,433 INFO L93 Difference]: Finished difference Result 1668 states and 7554 transitions. [2021-07-13 20:28:17,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:28:17,433 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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 28 [2021-07-13 20:28:17,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:17,436 INFO L225 Difference]: With dead ends: 1668 [2021-07-13 20:28:17,437 INFO L226 Difference]: Without dead ends: 1664 [2021-07-13 20:28:17,437 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1142.1ms TimeCoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:28:17,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2021-07-13 20:28:17,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1632. [2021-07-13 20:28:17,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1631 states have (on average 4.58185162477008) internal successors, (7473), 1631 states have internal predecessors, (7473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:17,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 7473 transitions. [2021-07-13 20:28:17,460 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 7473 transitions. Word has length 28 [2021-07-13 20:28:17,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:17,460 INFO L482 AbstractCegarLoop]: Abstraction has 1632 states and 7473 transitions. [2021-07-13 20:28:17,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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) [2021-07-13 20:28:17,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 7473 transitions. [2021-07-13 20:28:17,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:28:17,463 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:17,463 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:17,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable658,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:17,677 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:17,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:17,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1991978569, now seen corresponding path program 150 times [2021-07-13 20:28:17,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:17,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133196052] [2021-07-13 20:28:17,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:17,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:17,957 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:17,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:17,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133196052] [2021-07-13 20:28:17,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133196052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:17,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70688521] [2021-07-13 20:28:17,957 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:18,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:28:18,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:18,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:28:18,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:18,739 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:18,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70688521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:18,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:18,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-07-13 20:28:18,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489472473] [2021-07-13 20:28:18,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:28:18,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:18,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:28:18,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:28:18,740 INFO L87 Difference]: Start difference. First operand 1632 states and 7473 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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) [2021-07-13 20:28:19,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:19,147 INFO L93 Difference]: Finished difference Result 1671 states and 7560 transitions. [2021-07-13 20:28:19,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:28:19,147 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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 28 [2021-07-13 20:28:19,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:19,151 INFO L225 Difference]: With dead ends: 1671 [2021-07-13 20:28:19,151 INFO L226 Difference]: Without dead ends: 1667 [2021-07-13 20:28:19,152 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 1067.7ms TimeCoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:28:19,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1667 states. [2021-07-13 20:28:19,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1667 to 1636. [2021-07-13 20:28:19,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1635 states have (on average 4.575535168195719) internal successors, (7481), 1635 states have internal predecessors, (7481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:19,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 7481 transitions. [2021-07-13 20:28:19,188 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 7481 transitions. Word has length 28 [2021-07-13 20:28:19,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:19,188 INFO L482 AbstractCegarLoop]: Abstraction has 1636 states and 7481 transitions. [2021-07-13 20:28:19,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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) [2021-07-13 20:28:19,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 7481 transitions. [2021-07-13 20:28:19,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:28:19,190 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:19,191 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:19,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable664 [2021-07-13 20:28:19,391 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:19,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:19,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1733183245, now seen corresponding path program 151 times [2021-07-13 20:28:19,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:19,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807915313] [2021-07-13 20:28:19,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:19,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:19,623 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:19,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:19,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807915313] [2021-07-13 20:28:19,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807915313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:19,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176230090] [2021-07-13 20:28:19,623 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:19,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:19,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:28:19,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:20,269 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:20,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176230090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:20,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:20,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-07-13 20:28:20,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65689932] [2021-07-13 20:28:20,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:28:20,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:20,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:28:20,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:28:20,271 INFO L87 Difference]: Start difference. First operand 1636 states and 7481 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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) [2021-07-13 20:28:20,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:20,634 INFO L93 Difference]: Finished difference Result 1674 states and 7564 transitions. [2021-07-13 20:28:20,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:28:20,635 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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 28 [2021-07-13 20:28:20,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:20,638 INFO L225 Difference]: With dead ends: 1674 [2021-07-13 20:28:20,638 INFO L226 Difference]: Without dead ends: 1670 [2021-07-13 20:28:20,638 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 883.3ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:28:20,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2021-07-13 20:28:20,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1627. [2021-07-13 20:28:20,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1627 states, 1626 states have (on average 4.583640836408364) internal successors, (7453), 1626 states have internal predecessors, (7453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:20,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 7453 transitions. [2021-07-13 20:28:20,663 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 7453 transitions. Word has length 28 [2021-07-13 20:28:20,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:20,663 INFO L482 AbstractCegarLoop]: Abstraction has 1627 states and 7453 transitions. [2021-07-13 20:28:20,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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) [2021-07-13 20:28:20,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 7453 transitions. [2021-07-13 20:28:20,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:28:20,666 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:20,666 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:20,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable666,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:20,866 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:20,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:20,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1830495825, now seen corresponding path program 152 times [2021-07-13 20:28:20,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:20,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425066634] [2021-07-13 20:28:20,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:20,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:21,152 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:21,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:21,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425066634] [2021-07-13 20:28:21,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425066634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:21,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344183976] [2021-07-13 20:28:21,153 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:21,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:28:21,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:21,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:28:21,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:22,043 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:22,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344183976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:22,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:22,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-07-13 20:28:22,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548392524] [2021-07-13 20:28:22,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:28:22,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:22,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:28:22,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:28:22,044 INFO L87 Difference]: Start difference. First operand 1627 states and 7453 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:22,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:22,675 INFO L93 Difference]: Finished difference Result 1665 states and 7539 transitions. [2021-07-13 20:28:22,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:28:22,675 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:28:22,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:22,678 INFO L225 Difference]: With dead ends: 1665 [2021-07-13 20:28:22,679 INFO L226 Difference]: Without dead ends: 1661 [2021-07-13 20:28:22,679 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1418.9ms TimeCoverageRelationStatistics Valid=132, Invalid=1200, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:28:22,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-07-13 20:28:22,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1631. [2021-07-13 20:28:22,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1630 states have (on average 4.5773006134969325) internal successors, (7461), 1630 states have internal predecessors, (7461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:22,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 7461 transitions. [2021-07-13 20:28:22,702 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 7461 transitions. Word has length 28 [2021-07-13 20:28:22,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:22,702 INFO L482 AbstractCegarLoop]: Abstraction has 1631 states and 7461 transitions. [2021-07-13 20:28:22,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:22,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 7461 transitions. [2021-07-13 20:28:22,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:28:22,705 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:22,705 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:22,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable667,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:22,906 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:22,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:22,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1897191923, now seen corresponding path program 153 times [2021-07-13 20:28:22,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:22,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762091776] [2021-07-13 20:28:22,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:23,191 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:23,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:23,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762091776] [2021-07-13 20:28:23,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762091776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:23,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498964776] [2021-07-13 20:28:23,192 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:23,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:28:23,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:23,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:28:23,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:23,723 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-07-13 20:28:24,076 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:24,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498964776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:24,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:24,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-07-13 20:28:24,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86999609] [2021-07-13 20:28:24,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:28:24,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:24,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:28:24,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:28:24,077 INFO L87 Difference]: Start difference. First operand 1631 states and 7461 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:24,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:24,884 INFO L93 Difference]: Finished difference Result 1696 states and 7604 transitions. [2021-07-13 20:28:24,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:28:24,884 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:28:24,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:24,888 INFO L225 Difference]: With dead ends: 1696 [2021-07-13 20:28:24,888 INFO L226 Difference]: Without dead ends: 1692 [2021-07-13 20:28:24,888 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1470.7ms TimeCoverageRelationStatistics Valid=168, Invalid=1392, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:28:24,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2021-07-13 20:28:24,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1622. [2021-07-13 20:28:24,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 4.586057988895743) internal successors, (7434), 1621 states have internal predecessors, (7434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:24,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 7434 transitions. [2021-07-13 20:28:24,911 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 7434 transitions. Word has length 28 [2021-07-13 20:28:24,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:24,911 INFO L482 AbstractCegarLoop]: Abstraction has 1622 states and 7434 transitions. [2021-07-13 20:28:24,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:24,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 7434 transitions. [2021-07-13 20:28:24,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:28:24,914 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:24,914 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:25,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable672 [2021-07-13 20:28:25,115 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:25,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:25,115 INFO L82 PathProgramCache]: Analyzing trace with hash -2138980049, now seen corresponding path program 154 times [2021-07-13 20:28:25,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:25,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899441527] [2021-07-13 20:28:25,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:25,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:25,342 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:25,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:25,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899441527] [2021-07-13 20:28:25,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899441527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:25,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926763238] [2021-07-13 20:28:25,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:25,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:28:25,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:25,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:28:25,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:25,875 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-07-13 20:28:26,288 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:26,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926763238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:26,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:26,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-07-13 20:28:26,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984851619] [2021-07-13 20:28:26,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:28:26,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:26,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:28:26,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:28:26,289 INFO L87 Difference]: Start difference. First operand 1622 states and 7434 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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) [2021-07-13 20:28:26,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:26,911 INFO L93 Difference]: Finished difference Result 1654 states and 7498 transitions. [2021-07-13 20:28:26,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:28:26,911 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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 28 [2021-07-13 20:28:26,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:26,915 INFO L225 Difference]: With dead ends: 1654 [2021-07-13 20:28:26,915 INFO L226 Difference]: Without dead ends: 1650 [2021-07-13 20:28:26,915 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1332.3ms TimeCoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:28:26,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2021-07-13 20:28:26,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1618. [2021-07-13 20:28:26,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1617 states have (on average 4.587507730364873) internal successors, (7418), 1617 states have internal predecessors, (7418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:26,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 7418 transitions. [2021-07-13 20:28:26,948 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 7418 transitions. Word has length 28 [2021-07-13 20:28:26,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:26,948 INFO L482 AbstractCegarLoop]: Abstraction has 1618 states and 7418 transitions. [2021-07-13 20:28:26,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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) [2021-07-13 20:28:26,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 7418 transitions. [2021-07-13 20:28:26,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:28:26,951 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:26,951 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:27,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable677,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:27,152 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:27,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:27,152 INFO L82 PathProgramCache]: Analyzing trace with hash -196758805, now seen corresponding path program 155 times [2021-07-13 20:28:27,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:27,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363104144] [2021-07-13 20:28:27,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:27,329 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:27,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:27,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363104144] [2021-07-13 20:28:27,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363104144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:27,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718504189] [2021-07-13 20:28:27,329 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:27,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:28:27,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:27,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:28:27,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:28,230 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:28,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718504189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:28,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:28,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-07-13 20:28:28,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882402044] [2021-07-13 20:28:28,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:28:28,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:28,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:28:28,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:28:28,232 INFO L87 Difference]: Start difference. First operand 1618 states and 7418 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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) [2021-07-13 20:28:28,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:28,393 INFO L93 Difference]: Finished difference Result 1650 states and 7490 transitions. [2021-07-13 20:28:28,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:28:28,393 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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 28 [2021-07-13 20:28:28,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:28,396 INFO L225 Difference]: With dead ends: 1650 [2021-07-13 20:28:28,397 INFO L226 Difference]: Without dead ends: 1646 [2021-07-13 20:28:28,397 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 892.5ms TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:28:28,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2021-07-13 20:28:28,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1610. [2021-07-13 20:28:28,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 1609 states have (on average 4.599129894344313) internal successors, (7400), 1609 states have internal predecessors, (7400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:28,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 7400 transitions. [2021-07-13 20:28:28,435 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 7400 transitions. Word has length 28 [2021-07-13 20:28:28,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:28,435 INFO L482 AbstractCegarLoop]: Abstraction has 1610 states and 7400 transitions. [2021-07-13 20:28:28,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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) [2021-07-13 20:28:28,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 7400 transitions. [2021-07-13 20:28:28,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:28:28,438 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:28,438 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:28,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable683 [2021-07-13 20:28:28,639 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:28,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:28,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1332363625, now seen corresponding path program 156 times [2021-07-13 20:28:28,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:28,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891711899] [2021-07-13 20:28:28,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:28,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:28,794 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:28:28,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:28,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891711899] [2021-07-13 20:28:28,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891711899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:28,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368024405] [2021-07-13 20:28:28,795 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:28,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:28:28,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:28,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:28:28,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:29,469 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:28:29,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368024405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:29,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:29,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-13 20:28:29,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083844196] [2021-07-13 20:28:29,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:28:29,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:29,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:28:29,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:28:29,470 INFO L87 Difference]: Start difference. First operand 1610 states and 7400 transitions. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 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) [2021-07-13 20:28:29,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:29,808 INFO L93 Difference]: Finished difference Result 1574 states and 7191 transitions. [2021-07-13 20:28:29,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:28:29,808 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 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 28 [2021-07-13 20:28:29,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:29,811 INFO L225 Difference]: With dead ends: 1574 [2021-07-13 20:28:29,811 INFO L226 Difference]: Without dead ends: 1559 [2021-07-13 20:28:29,812 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 768.5ms TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:28:29,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1559 states. [2021-07-13 20:28:29,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1559 to 1531. [2021-07-13 20:28:29,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1530 states have (on average 4.633986928104576) internal successors, (7090), 1530 states have internal predecessors, (7090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:29,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 7090 transitions. [2021-07-13 20:28:29,833 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 7090 transitions. Word has length 28 [2021-07-13 20:28:29,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:29,833 INFO L482 AbstractCegarLoop]: Abstraction has 1531 states and 7090 transitions. [2021-07-13 20:28:29,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 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) [2021-07-13 20:28:29,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 7090 transitions. [2021-07-13 20:28:29,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:28:29,836 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:29,836 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:30,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable689 [2021-07-13 20:28:30,036 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:30,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:30,037 INFO L82 PathProgramCache]: Analyzing trace with hash -2110291579, now seen corresponding path program 157 times [2021-07-13 20:28:30,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:30,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339472753] [2021-07-13 20:28:30,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:30,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:30,301 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:30,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:30,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339472753] [2021-07-13 20:28:30,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339472753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:30,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118630533] [2021-07-13 20:28:30,301 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:30,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:30,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:28:30,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:30,863 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-07-13 20:28:31,218 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:31,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118630533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:31,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:31,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-07-13 20:28:31,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806539976] [2021-07-13 20:28:31,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:28:31,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:31,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:28:31,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:28:31,219 INFO L87 Difference]: Start difference. First operand 1531 states and 7090 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:31,790 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-07-13 20:28:32,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:32,050 INFO L93 Difference]: Finished difference Result 1578 states and 7201 transitions. [2021-07-13 20:28:32,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:28:32,050 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:28:32,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:32,053 INFO L225 Difference]: With dead ends: 1578 [2021-07-13 20:28:32,053 INFO L226 Difference]: Without dead ends: 1574 [2021-07-13 20:28:32,053 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1555.0ms TimeCoverageRelationStatistics Valid=140, Invalid=1342, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:28:32,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574 states. [2021-07-13 20:28:32,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1574 to 1538. [2021-07-13 20:28:32,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 4.62654521795706) internal successors, (7111), 1537 states have internal predecessors, (7111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:32,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 7111 transitions. [2021-07-13 20:28:32,075 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 7111 transitions. Word has length 28 [2021-07-13 20:28:32,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:32,075 INFO L482 AbstractCegarLoop]: Abstraction has 1538 states and 7111 transitions. [2021-07-13 20:28:32,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:32,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 7111 transitions. [2021-07-13 20:28:32,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:28:32,077 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:32,077 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:32,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable695 [2021-07-13 20:28:32,278 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:32,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:32,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1647182861, now seen corresponding path program 158 times [2021-07-13 20:28:32,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:32,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088708862] [2021-07-13 20:28:32,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:32,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:32,528 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:32,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:32,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088708862] [2021-07-13 20:28:32,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088708862] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:32,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588363394] [2021-07-13 20:28:32,529 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:32,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:28:32,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:32,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:28:32,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:33,081 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-07-13 20:28:33,601 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:33,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588363394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:33,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:33,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-07-13 20:28:33,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739537285] [2021-07-13 20:28:33,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:28:33,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:33,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:28:33,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:28:33,602 INFO L87 Difference]: Start difference. First operand 1538 states and 7111 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:34,381 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-07-13 20:28:34,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:34,610 INFO L93 Difference]: Finished difference Result 1586 states and 7223 transitions. [2021-07-13 20:28:34,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:28:34,611 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:28:34,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:34,614 INFO L225 Difference]: With dead ends: 1586 [2021-07-13 20:28:34,614 INFO L226 Difference]: Without dead ends: 1582 [2021-07-13 20:28:34,614 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1803.6ms TimeCoverageRelationStatistics Valid=140, Invalid=1420, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:28:34,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-07-13 20:28:34,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1544. [2021-07-13 20:28:34,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 4.620868438107583) internal successors, (7130), 1543 states have internal predecessors, (7130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:34,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 7130 transitions. [2021-07-13 20:28:34,645 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 7130 transitions. Word has length 28 [2021-07-13 20:28:34,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:34,645 INFO L482 AbstractCegarLoop]: Abstraction has 1544 states and 7130 transitions. [2021-07-13 20:28:34,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:34,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 7130 transitions. [2021-07-13 20:28:34,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:28:34,647 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:34,647 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:34,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable700 [2021-07-13 20:28:34,848 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:34,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:34,848 INFO L82 PathProgramCache]: Analyzing trace with hash -53750163, now seen corresponding path program 159 times [2021-07-13 20:28:34,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:34,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741615153] [2021-07-13 20:28:34,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:34,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:35,002 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:28:35,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:35,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741615153] [2021-07-13 20:28:35,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741615153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:35,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106994810] [2021-07-13 20:28:35,002 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:35,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:28:35,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:35,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:28:35,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:35,566 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:28:35,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106994810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:35,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:35,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-13 20:28:35,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048609703] [2021-07-13 20:28:35,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:28:35,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:35,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:28:35,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:28:35,567 INFO L87 Difference]: Start difference. First operand 1544 states and 7130 transitions. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 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) [2021-07-13 20:28:35,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:35,996 INFO L93 Difference]: Finished difference Result 1511 states and 6853 transitions. [2021-07-13 20:28:35,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:28:35,996 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 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 28 [2021-07-13 20:28:35,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:35,999 INFO L225 Difference]: With dead ends: 1511 [2021-07-13 20:28:35,999 INFO L226 Difference]: Without dead ends: 1493 [2021-07-13 20:28:35,999 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 816.4ms TimeCoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:28:36,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2021-07-13 20:28:36,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 1466. [2021-07-13 20:28:36,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 1465 states have (on average 4.602730375426622) internal successors, (6743), 1465 states have internal predecessors, (6743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:36,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 6743 transitions. [2021-07-13 20:28:36,020 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 6743 transitions. Word has length 28 [2021-07-13 20:28:36,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:36,020 INFO L482 AbstractCegarLoop]: Abstraction has 1466 states and 6743 transitions. [2021-07-13 20:28:36,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 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) [2021-07-13 20:28:36,020 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 6743 transitions. [2021-07-13 20:28:36,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:28:36,022 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:36,022 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:36,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable707,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:36,223 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:36,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:36,223 INFO L82 PathProgramCache]: Analyzing trace with hash 798561929, now seen corresponding path program 160 times [2021-07-13 20:28:36,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:36,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200517962] [2021-07-13 20:28:36,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:36,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:36,425 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:36,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:36,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200517962] [2021-07-13 20:28:36,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200517962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:36,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523917027] [2021-07-13 20:28:36,425 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:36,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:28:36,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:36,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:28:36,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:37,104 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:37,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523917027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:37,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:37,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-07-13 20:28:37,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46472784] [2021-07-13 20:28:37,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:28:37,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:37,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:28:37,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:28:37,105 INFO L87 Difference]: Start difference. First operand 1466 states and 6743 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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) [2021-07-13 20:28:37,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:37,332 INFO L93 Difference]: Finished difference Result 1512 states and 6853 transitions. [2021-07-13 20:28:37,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:28:37,333 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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 28 [2021-07-13 20:28:37,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:37,336 INFO L225 Difference]: With dead ends: 1512 [2021-07-13 20:28:37,336 INFO L226 Difference]: Without dead ends: 1508 [2021-07-13 20:28:37,336 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 762.8ms TimeCoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:28:37,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2021-07-13 20:28:37,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 1468. [2021-07-13 20:28:37,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 4.5998636673483295) internal successors, (6748), 1467 states have internal predecessors, (6748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:37,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 6748 transitions. [2021-07-13 20:28:37,357 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 6748 transitions. Word has length 28 [2021-07-13 20:28:37,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:37,357 INFO L482 AbstractCegarLoop]: Abstraction has 1468 states and 6748 transitions. [2021-07-13 20:28:37,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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) [2021-07-13 20:28:37,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 6748 transitions. [2021-07-13 20:28:37,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:28:37,360 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:37,360 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:37,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable708,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:37,561 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:37,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:37,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1757016913, now seen corresponding path program 161 times [2021-07-13 20:28:37,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:37,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727369016] [2021-07-13 20:28:37,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:37,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:37,761 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:37,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:37,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727369016] [2021-07-13 20:28:37,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727369016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:37,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652990044] [2021-07-13 20:28:37,761 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:37,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:28:37,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:37,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:28:37,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:38,588 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:38,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652990044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:38,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:38,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-07-13 20:28:38,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858982594] [2021-07-13 20:28:38,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:28:38,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:38,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:28:38,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:28:38,589 INFO L87 Difference]: Start difference. First operand 1468 states and 6748 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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) [2021-07-13 20:28:38,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:38,996 INFO L93 Difference]: Finished difference Result 1517 states and 6862 transitions. [2021-07-13 20:28:38,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:28:38,996 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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 28 [2021-07-13 20:28:38,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:39,000 INFO L225 Difference]: With dead ends: 1517 [2021-07-13 20:28:39,000 INFO L226 Difference]: Without dead ends: 1513 [2021-07-13 20:28:39,000 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1026.8ms TimeCoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:28:39,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2021-07-13 20:28:39,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 1466. [2021-07-13 20:28:39,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 1465 states have (on average 4.602730375426622) internal successors, (6743), 1465 states have internal predecessors, (6743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:39,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 6743 transitions. [2021-07-13 20:28:39,022 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 6743 transitions. Word has length 28 [2021-07-13 20:28:39,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:39,022 INFO L482 AbstractCegarLoop]: Abstraction has 1466 states and 6743 transitions. [2021-07-13 20:28:39,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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) [2021-07-13 20:28:39,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 6743 transitions. [2021-07-13 20:28:39,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:28:39,024 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:39,024 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:39,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable710,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:39,225 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:39,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:39,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1425884241, now seen corresponding path program 162 times [2021-07-13 20:28:39,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:39,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48772789] [2021-07-13 20:28:39,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:39,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:39,456 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:39,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:39,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48772789] [2021-07-13 20:28:39,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48772789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:39,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392732221] [2021-07-13 20:28:39,456 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:39,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 20:28:39,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:39,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:28:39,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:40,166 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:40,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392732221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:40,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:40,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-07-13 20:28:40,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37161785] [2021-07-13 20:28:40,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:28:40,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:40,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:28:40,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:28:40,167 INFO L87 Difference]: Start difference. First operand 1466 states and 6743 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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) [2021-07-13 20:28:40,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:40,750 INFO L93 Difference]: Finished difference Result 1519 states and 6864 transitions. [2021-07-13 20:28:40,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:28:40,750 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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 28 [2021-07-13 20:28:40,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:40,753 INFO L225 Difference]: With dead ends: 1519 [2021-07-13 20:28:40,753 INFO L226 Difference]: Without dead ends: 1515 [2021-07-13 20:28:40,754 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1197.2ms TimeCoverageRelationStatistics Valid=136, Invalid=1196, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:28:40,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-07-13 20:28:40,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1466. [2021-07-13 20:28:40,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 1465 states have (on average 4.6) internal successors, (6739), 1465 states have internal predecessors, (6739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:40,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 6739 transitions. [2021-07-13 20:28:40,774 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 6739 transitions. Word has length 28 [2021-07-13 20:28:40,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:40,774 INFO L482 AbstractCegarLoop]: Abstraction has 1466 states and 6739 transitions. [2021-07-13 20:28:40,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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) [2021-07-13 20:28:40,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 6739 transitions. [2021-07-13 20:28:40,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:28:40,777 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:40,777 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:40,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable714,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:40,978 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:40,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:40,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1167088917, now seen corresponding path program 163 times [2021-07-13 20:28:40,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:40,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537797803] [2021-07-13 20:28:40,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:40,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:41,177 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:41,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:41,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537797803] [2021-07-13 20:28:41,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537797803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:41,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786660363] [2021-07-13 20:28:41,177 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:41,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:41,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:28:41,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:41,632 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-07-13 20:28:42,089 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:42,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786660363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:42,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:42,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-07-13 20:28:42,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27695189] [2021-07-13 20:28:42,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:28:42,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:42,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:28:42,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:28:42,090 INFO L87 Difference]: Start difference. First operand 1466 states and 6739 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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) [2021-07-13 20:28:42,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:42,554 INFO L93 Difference]: Finished difference Result 1517 states and 6858 transitions. [2021-07-13 20:28:42,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:28:42,554 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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 28 [2021-07-13 20:28:42,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:42,558 INFO L225 Difference]: With dead ends: 1517 [2021-07-13 20:28:42,558 INFO L226 Difference]: Without dead ends: 1513 [2021-07-13 20:28:42,558 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1120.0ms TimeCoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:28:42,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2021-07-13 20:28:42,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 1466. [2021-07-13 20:28:42,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 1465 states have (on average 4.6) internal successors, (6739), 1465 states have internal predecessors, (6739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:42,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 6739 transitions. [2021-07-13 20:28:42,578 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 6739 transitions. Word has length 28 [2021-07-13 20:28:42,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:42,578 INFO L482 AbstractCegarLoop]: Abstraction has 1466 states and 6739 transitions. [2021-07-13 20:28:42,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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) [2021-07-13 20:28:42,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 6739 transitions. [2021-07-13 20:28:42,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:28:42,581 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:42,581 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:42,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable718,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:42,781 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:42,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:42,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1768583857, now seen corresponding path program 164 times [2021-07-13 20:28:42,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:42,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741377161] [2021-07-13 20:28:42,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:42,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:43,008 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:43,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:43,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741377161] [2021-07-13 20:28:43,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741377161] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:43,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472279537] [2021-07-13 20:28:43,008 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:43,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:28:43,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:43,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:28:43,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:43,638 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:28:43,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472279537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:43,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:43,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2021-07-13 20:28:43,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596351871] [2021-07-13 20:28:43,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:28:43,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:43,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:28:43,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:28:43,639 INFO L87 Difference]: Start difference. First operand 1466 states and 6739 transitions. Second operand has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 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) [2021-07-13 20:28:44,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:44,119 INFO L93 Difference]: Finished difference Result 1192 states and 5241 transitions. [2021-07-13 20:28:44,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:28:44,119 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 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 28 [2021-07-13 20:28:44,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:44,121 INFO L225 Difference]: With dead ends: 1192 [2021-07-13 20:28:44,121 INFO L226 Difference]: Without dead ends: 1168 [2021-07-13 20:28:44,121 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1001.6ms TimeCoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:28:44,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-07-13 20:28:44,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 1151. [2021-07-13 20:28:44,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 1150 states have (on average 4.472173913043478) internal successors, (5143), 1150 states have internal predecessors, (5143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:44,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 5143 transitions. [2021-07-13 20:28:44,137 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 5143 transitions. Word has length 28 [2021-07-13 20:28:44,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:44,137 INFO L482 AbstractCegarLoop]: Abstraction has 1151 states and 5143 transitions. [2021-07-13 20:28:44,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 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) [2021-07-13 20:28:44,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 5143 transitions. [2021-07-13 20:28:44,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:28:44,139 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:44,139 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:44,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable724,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:44,339 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:44,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:44,339 INFO L82 PathProgramCache]: Analyzing trace with hash 108442159, now seen corresponding path program 165 times [2021-07-13 20:28:44,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:44,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930378746] [2021-07-13 20:28:44,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:44,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:44,671 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:44,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:44,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930378746] [2021-07-13 20:28:44,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930378746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:44,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112967462] [2021-07-13 20:28:44,671 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:44,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:28:44,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:44,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:28:44,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:45,487 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-07-13 20:28:45,756 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:45,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112967462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:45,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:45,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-07-13 20:28:45,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122813352] [2021-07-13 20:28:45,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:28:45,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:45,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:28:45,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:28:45,757 INFO L87 Difference]: Start difference. First operand 1151 states and 5143 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:46,345 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-07-13 20:28:46,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:46,446 INFO L93 Difference]: Finished difference Result 1185 states and 5217 transitions. [2021-07-13 20:28:46,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:28:46,446 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:28:46,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:46,449 INFO L225 Difference]: With dead ends: 1185 [2021-07-13 20:28:46,449 INFO L226 Difference]: Without dead ends: 1181 [2021-07-13 20:28:46,449 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1648.1ms TimeCoverageRelationStatistics Valid=117, Invalid=1215, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:28:46,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-07-13 20:28:46,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1145. [2021-07-13 20:28:46,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 1144 states have (on average 4.481643356643357) internal successors, (5127), 1144 states have internal predecessors, (5127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:46,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 5127 transitions. [2021-07-13 20:28:46,464 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 5127 transitions. Word has length 28 [2021-07-13 20:28:46,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:46,464 INFO L482 AbstractCegarLoop]: Abstraction has 1145 states and 5127 transitions. [2021-07-13 20:28:46,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:46,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 5127 transitions. [2021-07-13 20:28:46,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:28:46,466 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:46,466 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:46,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable727,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:46,667 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:46,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:46,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1805090615, now seen corresponding path program 166 times [2021-07-13 20:28:46,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:46,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829592197] [2021-07-13 20:28:46,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:46,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:46,875 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:46,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:46,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829592197] [2021-07-13 20:28:46,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829592197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:46,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164825242] [2021-07-13 20:28:46,876 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:46,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:28:46,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:46,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:28:46,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:47,473 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-07-13 20:28:47,827 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:47,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164825242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:47,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:47,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-07-13 20:28:47,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825405584] [2021-07-13 20:28:47,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:28:47,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:47,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:28:47,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:28:47,828 INFO L87 Difference]: Start difference. First operand 1145 states and 5127 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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) [2021-07-13 20:28:48,369 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-07-13 20:28:48,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:48,505 INFO L93 Difference]: Finished difference Result 1180 states and 5202 transitions. [2021-07-13 20:28:48,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:28:48,505 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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 28 [2021-07-13 20:28:48,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:48,507 INFO L225 Difference]: With dead ends: 1180 [2021-07-13 20:28:48,507 INFO L226 Difference]: Without dead ends: 1176 [2021-07-13 20:28:48,508 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1377.2ms TimeCoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:28:48,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2021-07-13 20:28:48,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1135. [2021-07-13 20:28:48,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1134 states have (on average 4.493827160493828) internal successors, (5096), 1134 states have internal predecessors, (5096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:48,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 5096 transitions. [2021-07-13 20:28:48,523 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 5096 transitions. Word has length 28 [2021-07-13 20:28:48,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:48,523 INFO L482 AbstractCegarLoop]: Abstraction has 1135 states and 5096 transitions. [2021-07-13 20:28:48,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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) [2021-07-13 20:28:48,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 5096 transitions. [2021-07-13 20:28:48,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:28:48,525 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:48,525 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:48,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable735,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:48,725 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:48,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:48,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1952383825, now seen corresponding path program 167 times [2021-07-13 20:28:48,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:48,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530690358] [2021-07-13 20:28:48,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:48,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:48,973 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:48,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:48,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530690358] [2021-07-13 20:28:48,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530690358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:48,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309201574] [2021-07-13 20:28:48,973 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:49,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:28:49,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:49,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:28:49,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:49,619 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-07-13 20:28:50,043 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:50,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309201574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:50,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:50,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-07-13 20:28:50,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536877529] [2021-07-13 20:28:50,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:28:50,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:50,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:28:50,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:28:50,044 INFO L87 Difference]: Start difference. First operand 1135 states and 5096 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:50,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:50,733 INFO L93 Difference]: Finished difference Result 1168 states and 5162 transitions. [2021-07-13 20:28:50,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:28:50,733 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:28:50,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:50,735 INFO L225 Difference]: With dead ends: 1168 [2021-07-13 20:28:50,735 INFO L226 Difference]: Without dead ends: 1164 [2021-07-13 20:28:50,736 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1501.1ms TimeCoverageRelationStatistics Valid=134, Invalid=1272, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:28:50,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-07-13 20:28:50,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1112. [2021-07-13 20:28:50,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 4.53015301530153) internal successors, (5033), 1111 states have internal predecessors, (5033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:50,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 5033 transitions. [2021-07-13 20:28:50,751 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 5033 transitions. Word has length 28 [2021-07-13 20:28:50,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:50,751 INFO L482 AbstractCegarLoop]: Abstraction has 1112 states and 5033 transitions. [2021-07-13 20:28:50,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:50,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 5033 transitions. [2021-07-13 20:28:50,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:28:50,752 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:50,752 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:50,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable742 [2021-07-13 20:28:50,953 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:50,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:50,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1451861432, now seen corresponding path program 168 times [2021-07-13 20:28:50,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:50,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067672669] [2021-07-13 20:28:50,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:50,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:51,105 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:28:51,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:51,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067672669] [2021-07-13 20:28:51,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067672669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:51,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391325071] [2021-07-13 20:28:51,105 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:51,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:28:51,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:51,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:28:51,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:51,466 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 [2021-07-13 20:28:51,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:51,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:51,505 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 [2021-07-13 20:28:51,506 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:51,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:51,541 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 [2021-07-13 20:28:51,541 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:51,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:51,575 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 [2021-07-13 20:28:51,576 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:51,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:51,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-13 20:28:51,610 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:123, output treesize:95 [2021-07-13 20:29:08,036 WARN L205 SmtUtils]: Spent 16.08 s on a formula simplification that was a NOOP. DAG size: 57 [2021-07-13 20:29:08,051 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:29:08,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391325071] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:08,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:08,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-07-13 20:29:08,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812285258] [2021-07-13 20:29:08,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:29:08,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:08,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:29:08,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:29:08,052 INFO L87 Difference]: Start difference. First operand 1112 states and 5033 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:08,326 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2021-07-13 20:29:08,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:08,386 INFO L93 Difference]: Finished difference Result 2488 states and 10938 transitions. [2021-07-13 20:29:08,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:29:08,386 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:29:08,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:08,391 INFO L225 Difference]: With dead ends: 2488 [2021-07-13 20:29:08,391 INFO L226 Difference]: Without dead ends: 2422 [2021-07-13 20:29:08,391 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 16759.0ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:29:08,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2021-07-13 20:29:08,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 1684. [2021-07-13 20:29:08,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1683 states have (on average 4.7260843731431965) internal successors, (7954), 1683 states have internal predecessors, (7954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:08,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 7954 transitions. [2021-07-13 20:29:08,420 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 7954 transitions. Word has length 29 [2021-07-13 20:29:08,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:08,420 INFO L482 AbstractCegarLoop]: Abstraction has 1684 states and 7954 transitions. [2021-07-13 20:29:08,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:08,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 7954 transitions. [2021-07-13 20:29:08,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:29:08,423 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:08,423 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:08,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable750 [2021-07-13 20:29:08,624 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:08,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:08,624 INFO L82 PathProgramCache]: Analyzing trace with hash -462072546, now seen corresponding path program 169 times [2021-07-13 20:29:08,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:08,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535116487] [2021-07-13 20:29:08,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:08,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:08,883 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:08,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:08,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535116487] [2021-07-13 20:29:08,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535116487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:08,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742814590] [2021-07-13 20:29:08,884 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:08,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:08,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:29:08,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:09,762 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:09,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742814590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:09,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:09,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:29:09,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927470158] [2021-07-13 20:29:09,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:29:09,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:09,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:29:09,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:29:09,763 INFO L87 Difference]: Start difference. First operand 1684 states and 7954 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:10,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:10,066 INFO L93 Difference]: Finished difference Result 1831 states and 8338 transitions. [2021-07-13 20:29:10,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:29:10,066 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:29:10,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:10,070 INFO L225 Difference]: With dead ends: 1831 [2021-07-13 20:29:10,070 INFO L226 Difference]: Without dead ends: 1814 [2021-07-13 20:29:10,070 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1070.0ms TimeCoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:29:10,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1814 states. [2021-07-13 20:29:10,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1814 to 1728. [2021-07-13 20:29:10,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1728 states, 1727 states have (on average 4.672264041690793) internal successors, (8069), 1727 states have internal predecessors, (8069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:10,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 8069 transitions. [2021-07-13 20:29:10,095 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 8069 transitions. Word has length 29 [2021-07-13 20:29:10,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:10,095 INFO L482 AbstractCegarLoop]: Abstraction has 1728 states and 8069 transitions. [2021-07-13 20:29:10,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:10,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 8069 transitions. [2021-07-13 20:29:10,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:29:10,098 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:10,098 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:10,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable756 [2021-07-13 20:29:10,298 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:10,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:10,299 INFO L82 PathProgramCache]: Analyzing trace with hash 347953604, now seen corresponding path program 170 times [2021-07-13 20:29:10,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:10,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521916366] [2021-07-13 20:29:10,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:10,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:10,576 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:10,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:10,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521916366] [2021-07-13 20:29:10,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521916366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:10,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198484817] [2021-07-13 20:29:10,577 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:10,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:29:10,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:10,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:29:10,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:11,201 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-07-13 20:29:11,615 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:11,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198484817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:11,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:11,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:29:11,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573636061] [2021-07-13 20:29:11,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:29:11,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:11,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:29:11,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:29:11,616 INFO L87 Difference]: Start difference. First operand 1728 states and 8069 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:12,281 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-07-13 20:29:12,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:12,414 INFO L93 Difference]: Finished difference Result 1769 states and 8177 transitions. [2021-07-13 20:29:12,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:29:12,415 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:29:12,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:12,419 INFO L225 Difference]: With dead ends: 1769 [2021-07-13 20:29:12,419 INFO L226 Difference]: Without dead ends: 1762 [2021-07-13 20:29:12,419 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1637.8ms TimeCoverageRelationStatistics Valid=115, Invalid=1367, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:29:12,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1762 states. [2021-07-13 20:29:12,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1762 to 1751. [2021-07-13 20:29:12,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1751 states, 1750 states have (on average 4.646857142857143) internal successors, (8132), 1750 states have internal predecessors, (8132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:12,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 8132 transitions. [2021-07-13 20:29:12,444 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 8132 transitions. Word has length 29 [2021-07-13 20:29:12,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:12,444 INFO L482 AbstractCegarLoop]: Abstraction has 1751 states and 8132 transitions. [2021-07-13 20:29:12,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:12,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 8132 transitions. [2021-07-13 20:29:12,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:29:12,447 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:12,447 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:12,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable761 [2021-07-13 20:29:12,648 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:12,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:12,648 INFO L82 PathProgramCache]: Analyzing trace with hash 865544252, now seen corresponding path program 171 times [2021-07-13 20:29:12,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:12,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82088053] [2021-07-13 20:29:12,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:12,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:12,988 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:12,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:12,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82088053] [2021-07-13 20:29:12,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82088053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:12,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167274235] [2021-07-13 20:29:12,988 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:13,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:29:13,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:13,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:29:13,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:13,507 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-07-13 20:29:13,990 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:13,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167274235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:13,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:13,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:29:13,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186529286] [2021-07-13 20:29:13,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:29:13,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:13,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:29:13,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:29:13,991 INFO L87 Difference]: Start difference. First operand 1751 states and 8132 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:14,545 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-07-13 20:29:14,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:14,921 INFO L93 Difference]: Finished difference Result 1810 states and 8279 transitions. [2021-07-13 20:29:14,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:29:14,921 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:29:14,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:14,925 INFO L225 Difference]: With dead ends: 1810 [2021-07-13 20:29:14,925 INFO L226 Difference]: Without dead ends: 1798 [2021-07-13 20:29:14,925 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1774.2ms TimeCoverageRelationStatistics Valid=157, Invalid=1483, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:29:14,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1798 states. [2021-07-13 20:29:14,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1798 to 1769. [2021-07-13 20:29:14,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1769 states, 1768 states have (on average 4.628393665158371) internal successors, (8183), 1768 states have internal predecessors, (8183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:14,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 8183 transitions. [2021-07-13 20:29:14,951 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 8183 transitions. Word has length 29 [2021-07-13 20:29:14,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:14,951 INFO L482 AbstractCegarLoop]: Abstraction has 1769 states and 8183 transitions. [2021-07-13 20:29:14,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:14,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 8183 transitions. [2021-07-13 20:29:14,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:29:14,954 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:14,954 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:15,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable765,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:15,154 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:15,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:15,154 INFO L82 PathProgramCache]: Analyzing trace with hash 328099136, now seen corresponding path program 172 times [2021-07-13 20:29:15,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:15,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865291186] [2021-07-13 20:29:15,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:15,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:15,492 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:15,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:15,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865291186] [2021-07-13 20:29:15,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865291186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:15,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957881362] [2021-07-13 20:29:15,493 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:15,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:29:15,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:15,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:29:15,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:16,090 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:16,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957881362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:16,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:16,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:29:16,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286289330] [2021-07-13 20:29:16,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:29:16,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:16,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:29:16,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:29:16,091 INFO L87 Difference]: Start difference. First operand 1769 states and 8183 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:17,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:17,119 INFO L93 Difference]: Finished difference Result 2432 states and 10664 transitions. [2021-07-13 20:29:17,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:29:17,120 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:29:17,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:17,125 INFO L225 Difference]: With dead ends: 2432 [2021-07-13 20:29:17,125 INFO L226 Difference]: Without dead ends: 2349 [2021-07-13 20:29:17,125 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1515.1ms TimeCoverageRelationStatistics Valid=312, Invalid=1850, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:29:17,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2349 states. [2021-07-13 20:29:17,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2349 to 1981. [2021-07-13 20:29:17,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1980 states have (on average 4.653030303030303) internal successors, (9213), 1980 states have internal predecessors, (9213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:17,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 9213 transitions. [2021-07-13 20:29:17,156 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 9213 transitions. Word has length 29 [2021-07-13 20:29:17,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:17,156 INFO L482 AbstractCegarLoop]: Abstraction has 1981 states and 9213 transitions. [2021-07-13 20:29:17,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:17,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 9213 transitions. [2021-07-13 20:29:17,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:29:17,159 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:17,159 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:17,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable770,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:17,360 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:17,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:17,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1585433638, now seen corresponding path program 173 times [2021-07-13 20:29:17,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:17,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605812003] [2021-07-13 20:29:17,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:17,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:17,804 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:17,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:17,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605812003] [2021-07-13 20:29:17,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605812003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:17,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856870301] [2021-07-13 20:29:17,804 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:17,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:29:17,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:17,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:29:17,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:18,690 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:18,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856870301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:18,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:18,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:29:18,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901723164] [2021-07-13 20:29:18,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:29:18,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:18,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:29:18,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:29:18,691 INFO L87 Difference]: Start difference. First operand 1981 states and 9213 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:19,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:19,879 INFO L93 Difference]: Finished difference Result 2286 states and 10241 transitions. [2021-07-13 20:29:19,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:29:19,880 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:29:19,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:19,884 INFO L225 Difference]: With dead ends: 2286 [2021-07-13 20:29:19,884 INFO L226 Difference]: Without dead ends: 2194 [2021-07-13 20:29:19,884 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1950.9ms TimeCoverageRelationStatistics Valid=261, Invalid=1901, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:29:19,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2194 states. [2021-07-13 20:29:19,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2194 to 2066. [2021-07-13 20:29:19,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2066 states, 2065 states have (on average 4.632445520581114) internal successors, (9566), 2065 states have internal predecessors, (9566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:19,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2066 states to 2066 states and 9566 transitions. [2021-07-13 20:29:19,928 INFO L78 Accepts]: Start accepts. Automaton has 2066 states and 9566 transitions. Word has length 29 [2021-07-13 20:29:19,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:19,928 INFO L482 AbstractCegarLoop]: Abstraction has 2066 states and 9566 transitions. [2021-07-13 20:29:19,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:19,929 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states and 9566 transitions. [2021-07-13 20:29:19,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:29:19,932 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:19,932 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:20,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable771,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:20,132 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:20,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:20,133 INFO L82 PathProgramCache]: Analyzing trace with hash 89744602, now seen corresponding path program 174 times [2021-07-13 20:29:20,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:20,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799724231] [2021-07-13 20:29:20,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:20,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:20,422 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:20,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:20,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799724231] [2021-07-13 20:29:20,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799724231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:20,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474061936] [2021-07-13 20:29:20,423 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:20,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 20:29:20,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:20,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:29:20,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:21,194 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:21,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474061936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:21,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:21,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:29:21,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650385605] [2021-07-13 20:29:21,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:29:21,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:21,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:29:21,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:29:21,195 INFO L87 Difference]: Start difference. First operand 2066 states and 9566 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:21,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:21,683 INFO L93 Difference]: Finished difference Result 2244 states and 10109 transitions. [2021-07-13 20:29:21,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:29:21,684 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:29:21,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:21,688 INFO L225 Difference]: With dead ends: 2244 [2021-07-13 20:29:21,688 INFO L226 Difference]: Without dead ends: 2232 [2021-07-13 20:29:21,688 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1114.9ms TimeCoverageRelationStatistics Valid=164, Invalid=1242, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:29:21,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2232 states. [2021-07-13 20:29:21,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2232 to 2102. [2021-07-13 20:29:21,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2102 states, 2101 states have (on average 4.627796287482151) internal successors, (9723), 2101 states have internal predecessors, (9723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:21,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2102 states to 2102 states and 9723 transitions. [2021-07-13 20:29:21,719 INFO L78 Accepts]: Start accepts. Automaton has 2102 states and 9723 transitions. Word has length 29 [2021-07-13 20:29:21,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:21,719 INFO L482 AbstractCegarLoop]: Abstraction has 2102 states and 9723 transitions. [2021-07-13 20:29:21,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:21,720 INFO L276 IsEmpty]: Start isEmpty. Operand 2102 states and 9723 transitions. [2021-07-13 20:29:21,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:29:21,723 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:21,723 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:21,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable774 [2021-07-13 20:29:21,931 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:21,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:21,931 INFO L82 PathProgramCache]: Analyzing trace with hash -477534946, now seen corresponding path program 175 times [2021-07-13 20:29:21,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:21,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124879194] [2021-07-13 20:29:21,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:21,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:22,214 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:22,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:22,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124879194] [2021-07-13 20:29:22,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124879194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:22,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112058791] [2021-07-13 20:29:22,214 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:22,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:22,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:29:22,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:22,668 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-07-13 20:29:23,197 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:23,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112058791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:23,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:23,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:29:23,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601631594] [2021-07-13 20:29:23,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:29:23,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:23,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:29:23,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=852, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:29:23,198 INFO L87 Difference]: Start difference. First operand 2102 states and 9723 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:24,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:24,253 INFO L93 Difference]: Finished difference Result 2144 states and 9820 transitions. [2021-07-13 20:29:24,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:29:24,254 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:29:24,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:24,258 INFO L225 Difference]: With dead ends: 2144 [2021-07-13 20:29:24,258 INFO L226 Difference]: Without dead ends: 2132 [2021-07-13 20:29:24,259 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1839.3ms TimeCoverageRelationStatistics Valid=152, Invalid=1740, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:29:24,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2132 states. [2021-07-13 20:29:24,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2132 to 2103. [2021-07-13 20:29:24,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2103 states, 2102 states have (on average 4.627021883920076) internal successors, (9726), 2102 states have internal predecessors, (9726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:24,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2103 states to 2103 states and 9726 transitions. [2021-07-13 20:29:24,290 INFO L78 Accepts]: Start accepts. Automaton has 2103 states and 9726 transitions. Word has length 29 [2021-07-13 20:29:24,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:24,290 INFO L482 AbstractCegarLoop]: Abstraction has 2103 states and 9726 transitions. [2021-07-13 20:29:24,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:24,290 INFO L276 IsEmpty]: Start isEmpty. Operand 2103 states and 9726 transitions. [2021-07-13 20:29:24,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:29:24,293 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:24,294 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:24,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable778,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:24,494 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:24,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:24,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1199394428, now seen corresponding path program 176 times [2021-07-13 20:29:24,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:24,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083235764] [2021-07-13 20:29:24,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:24,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:24,762 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:24,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:24,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083235764] [2021-07-13 20:29:24,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083235764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:24,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434272765] [2021-07-13 20:29:24,763 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:24,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:29:24,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:24,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:29:24,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:25,622 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:25,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434272765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:25,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:25,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:29:25,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981053565] [2021-07-13 20:29:25,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:29:25,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:25,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:29:25,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=853, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:29:25,623 INFO L87 Difference]: Start difference. First operand 2103 states and 9726 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:26,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:26,132 INFO L93 Difference]: Finished difference Result 2149 states and 9838 transitions. [2021-07-13 20:29:26,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:29:26,132 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:29:26,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:26,136 INFO L225 Difference]: With dead ends: 2149 [2021-07-13 20:29:26,136 INFO L226 Difference]: Without dead ends: 2142 [2021-07-13 20:29:26,137 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1187.7ms TimeCoverageRelationStatistics Valid=108, Invalid=1224, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:29:26,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2021-07-13 20:29:26,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 2114. [2021-07-13 20:29:26,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2113 states have (on average 4.613819214387127) internal successors, (9749), 2113 states have internal predecessors, (9749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:26,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 9749 transitions. [2021-07-13 20:29:26,177 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 9749 transitions. Word has length 29 [2021-07-13 20:29:26,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:26,177 INFO L482 AbstractCegarLoop]: Abstraction has 2114 states and 9749 transitions. [2021-07-13 20:29:26,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:26,177 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 9749 transitions. [2021-07-13 20:29:26,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:29:26,181 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:26,181 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:26,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable783 [2021-07-13 20:29:26,381 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:26,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:26,382 INFO L82 PathProgramCache]: Analyzing trace with hash -714138346, now seen corresponding path program 177 times [2021-07-13 20:29:26,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:26,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019332090] [2021-07-13 20:29:26,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:26,728 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:26,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:26,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019332090] [2021-07-13 20:29:26,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019332090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:26,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239005164] [2021-07-13 20:29:26,728 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:26,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 20:29:26,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:26,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:29:26,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:27,598 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:27,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239005164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:27,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:27,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:29:27,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736004550] [2021-07-13 20:29:27,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:29:27,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:27,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:29:27,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:29:27,599 INFO L87 Difference]: Start difference. First operand 2114 states and 9749 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:28,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:28,931 INFO L93 Difference]: Finished difference Result 2362 states and 10569 transitions. [2021-07-13 20:29:28,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:29:28,932 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:29:28,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:28,937 INFO L225 Difference]: With dead ends: 2362 [2021-07-13 20:29:28,937 INFO L226 Difference]: Without dead ends: 2294 [2021-07-13 20:29:28,937 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 1913.9ms TimeCoverageRelationStatistics Valid=322, Invalid=2030, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:29:28,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2294 states. [2021-07-13 20:29:28,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2294 to 2155. [2021-07-13 20:29:28,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2155 states, 2154 states have (on average 4.589136490250697) internal successors, (9885), 2154 states have internal predecessors, (9885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:28,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2155 states to 2155 states and 9885 transitions. [2021-07-13 20:29:28,967 INFO L78 Accepts]: Start accepts. Automaton has 2155 states and 9885 transitions. Word has length 29 [2021-07-13 20:29:28,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:28,967 INFO L482 AbstractCegarLoop]: Abstraction has 2155 states and 9885 transitions. [2021-07-13 20:29:28,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:28,967 INFO L276 IsEmpty]: Start isEmpty. Operand 2155 states and 9885 transitions. [2021-07-13 20:29:28,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:29:28,970 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:28,970 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:29,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable786 [2021-07-13 20:29:29,171 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:29,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:29,171 INFO L82 PathProgramCache]: Analyzing trace with hash 961039894, now seen corresponding path program 178 times [2021-07-13 20:29:29,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:29,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716334331] [2021-07-13 20:29:29,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:29,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:29,460 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:29,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:29,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716334331] [2021-07-13 20:29:29,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716334331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:29,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040018128] [2021-07-13 20:29:29,461 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:29,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:29:29,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:29,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:29:29,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:30,111 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:30,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040018128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:30,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:30,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:29:30,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49470561] [2021-07-13 20:29:30,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:29:30,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:30,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:29:30,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=848, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:29:30,112 INFO L87 Difference]: Start difference. First operand 2155 states and 9885 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:30,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:30,378 INFO L93 Difference]: Finished difference Result 2204 states and 10013 transitions. [2021-07-13 20:29:30,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:29:30,378 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:29:30,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:30,382 INFO L225 Difference]: With dead ends: 2204 [2021-07-13 20:29:30,382 INFO L226 Difference]: Without dead ends: 2197 [2021-07-13 20:29:30,383 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 833.5ms TimeCoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:29:30,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2197 states. [2021-07-13 20:29:30,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2197 to 2167. [2021-07-13 20:29:30,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2166 states have (on average 4.577562326869806) internal successors, (9915), 2166 states have internal predecessors, (9915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:30,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 9915 transitions. [2021-07-13 20:29:30,414 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 9915 transitions. Word has length 29 [2021-07-13 20:29:30,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:30,414 INFO L482 AbstractCegarLoop]: Abstraction has 2167 states and 9915 transitions. [2021-07-13 20:29:30,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:30,415 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 9915 transitions. [2021-07-13 20:29:30,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:29:30,418 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:30,418 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:30,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable791,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:30,618 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:30,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:30,619 INFO L82 PathProgramCache]: Analyzing trace with hash 393760346, now seen corresponding path program 179 times [2021-07-13 20:29:30,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:30,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919081589] [2021-07-13 20:29:30,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:30,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:30,949 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:30,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:30,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919081589] [2021-07-13 20:29:30,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919081589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:30,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380503109] [2021-07-13 20:29:30,950 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:30,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:29:30,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:30,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:29:30,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:31,688 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:31,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380503109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:31,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:31,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:29:31,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052635129] [2021-07-13 20:29:31,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:29:31,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:31,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:29:31,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:29:31,689 INFO L87 Difference]: Start difference. First operand 2167 states and 9915 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:32,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:32,443 INFO L93 Difference]: Finished difference Result 2306 states and 10326 transitions. [2021-07-13 20:29:32,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:29:32,443 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:29:32,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:32,447 INFO L225 Difference]: With dead ends: 2306 [2021-07-13 20:29:32,448 INFO L226 Difference]: Without dead ends: 2254 [2021-07-13 20:29:32,448 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1384.9ms TimeCoverageRelationStatistics Valid=191, Invalid=1449, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:29:32,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2021-07-13 20:29:32,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 2187. [2021-07-13 20:29:32,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2186 states have (on average 4.562671546203111) internal successors, (9974), 2186 states have internal predecessors, (9974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:32,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 9974 transitions. [2021-07-13 20:29:32,481 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 9974 transitions. Word has length 29 [2021-07-13 20:29:32,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:32,481 INFO L482 AbstractCegarLoop]: Abstraction has 2187 states and 9974 transitions. [2021-07-13 20:29:32,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:32,481 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 9974 transitions. [2021-07-13 20:29:32,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:29:32,485 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:32,485 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:32,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable792 [2021-07-13 20:29:32,685 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:32,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:32,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1672037662, now seen corresponding path program 180 times [2021-07-13 20:29:32,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:32,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517674385] [2021-07-13 20:29:32,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:32,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:33,005 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:33,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:33,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517674385] [2021-07-13 20:29:33,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517674385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:33,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448717093] [2021-07-13 20:29:33,006 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:33,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 20:29:33,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:33,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:29:33,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:33,912 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:33,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448717093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:33,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:33,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:29:33,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566503747] [2021-07-13 20:29:33,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:29:33,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:33,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:29:33,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:29:33,913 INFO L87 Difference]: Start difference. First operand 2187 states and 9974 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:34,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:34,801 INFO L93 Difference]: Finished difference Result 2348 states and 10539 transitions. [2021-07-13 20:29:34,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:29:34,801 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:29:34,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:34,806 INFO L225 Difference]: With dead ends: 2348 [2021-07-13 20:29:34,806 INFO L226 Difference]: Without dead ends: 2316 [2021-07-13 20:29:34,806 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1643.0ms TimeCoverageRelationStatistics Valid=233, Invalid=1659, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:29:34,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2021-07-13 20:29:34,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 2243. [2021-07-13 20:29:34,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2243 states, 2242 states have (on average 4.558876003568242) internal successors, (10221), 2242 states have internal predecessors, (10221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:34,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2243 states to 2243 states and 10221 transitions. [2021-07-13 20:29:34,837 INFO L78 Accepts]: Start accepts. Automaton has 2243 states and 10221 transitions. Word has length 29 [2021-07-13 20:29:34,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:34,838 INFO L482 AbstractCegarLoop]: Abstraction has 2243 states and 10221 transitions. [2021-07-13 20:29:34,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:34,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2243 states and 10221 transitions. [2021-07-13 20:29:34,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:29:34,841 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:34,841 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:35,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable795 [2021-07-13 20:29:35,042 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:35,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:35,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1266240858, now seen corresponding path program 181 times [2021-07-13 20:29:35,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:35,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71691750] [2021-07-13 20:29:35,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:35,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:35,309 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:35,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:35,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71691750] [2021-07-13 20:29:35,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71691750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:35,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899466647] [2021-07-13 20:29:35,309 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:35,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:35,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:29:35,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:36,291 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:36,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899466647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:36,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:36,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:29:36,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987502969] [2021-07-13 20:29:36,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:29:36,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:36,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:29:36,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:29:36,292 INFO L87 Difference]: Start difference. First operand 2243 states and 10221 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:37,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:37,033 INFO L93 Difference]: Finished difference Result 2425 states and 10774 transitions. [2021-07-13 20:29:37,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:29:37,033 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:29:37,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:37,039 INFO L225 Difference]: With dead ends: 2425 [2021-07-13 20:29:37,039 INFO L226 Difference]: Without dead ends: 2413 [2021-07-13 20:29:37,039 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1444.4ms TimeCoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:29:37,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2413 states. [2021-07-13 20:29:37,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2413 to 2246. [2021-07-13 20:29:37,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2246 states, 2245 states have (on average 4.564810690423163) internal successors, (10248), 2245 states have internal predecessors, (10248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:37,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2246 states to 2246 states and 10248 transitions. [2021-07-13 20:29:37,074 INFO L78 Accepts]: Start accepts. Automaton has 2246 states and 10248 transitions. Word has length 29 [2021-07-13 20:29:37,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:37,074 INFO L482 AbstractCegarLoop]: Abstraction has 2246 states and 10248 transitions. [2021-07-13 20:29:37,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:37,074 INFO L276 IsEmpty]: Start isEmpty. Operand 2246 states and 10248 transitions. [2021-07-13 20:29:37,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:29:37,078 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:37,078 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:37,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable800,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:37,279 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:37,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:37,279 INFO L82 PathProgramCache]: Analyzing trace with hash 698961310, now seen corresponding path program 182 times [2021-07-13 20:29:37,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:37,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64962256] [2021-07-13 20:29:37,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:37,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:37,545 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:37,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:37,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64962256] [2021-07-13 20:29:37,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64962256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:37,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73307714] [2021-07-13 20:29:37,546 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:37,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:29:37,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:37,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:29:37,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:38,080 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-07-13 20:29:38,553 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:38,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73307714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:38,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:38,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:29:38,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690454585] [2021-07-13 20:29:38,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:29:38,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:38,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:29:38,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=848, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:29:38,554 INFO L87 Difference]: Start difference. First operand 2246 states and 10248 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:39,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:39,253 INFO L93 Difference]: Finished difference Result 2282 states and 10326 transitions. [2021-07-13 20:29:39,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:29:39,253 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:29:39,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:39,258 INFO L225 Difference]: With dead ends: 2282 [2021-07-13 20:29:39,258 INFO L226 Difference]: Without dead ends: 2270 [2021-07-13 20:29:39,258 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1489.9ms TimeCoverageRelationStatistics Valid=139, Invalid=1421, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:29:39,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2021-07-13 20:29:39,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 2241. [2021-07-13 20:29:39,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2241 states, 2240 states have (on average 4.568303571428571) internal successors, (10233), 2240 states have internal predecessors, (10233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:39,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 10233 transitions. [2021-07-13 20:29:39,289 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 10233 transitions. Word has length 29 [2021-07-13 20:29:39,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:39,289 INFO L482 AbstractCegarLoop]: Abstraction has 2241 states and 10233 transitions. [2021-07-13 20:29:39,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:39,289 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 10233 transitions. [2021-07-13 20:29:39,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:29:39,293 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:39,293 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:39,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable804 [2021-07-13 20:29:39,493 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:39,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:39,494 INFO L82 PathProgramCache]: Analyzing trace with hash 778277730, now seen corresponding path program 183 times [2021-07-13 20:29:39,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:39,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787560959] [2021-07-13 20:29:39,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:39,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:39,802 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:39,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:39,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787560959] [2021-07-13 20:29:39,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787560959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:39,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852516360] [2021-07-13 20:29:39,803 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:39,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:29:39,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:39,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:29:39,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:40,747 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:40,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852516360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:40,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:40,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:29:40,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109016452] [2021-07-13 20:29:40,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:29:40,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:40,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:29:40,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:29:40,748 INFO L87 Difference]: Start difference. First operand 2241 states and 10233 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:41,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:41,118 INFO L93 Difference]: Finished difference Result 2376 states and 10589 transitions. [2021-07-13 20:29:41,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:29:41,118 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:29:41,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:41,123 INFO L225 Difference]: With dead ends: 2376 [2021-07-13 20:29:41,123 INFO L226 Difference]: Without dead ends: 2359 [2021-07-13 20:29:41,124 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1185.7ms TimeCoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:29:41,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2021-07-13 20:29:41,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 2234. [2021-07-13 20:29:41,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2234 states, 2233 states have (on average 4.5763546798029555) internal successors, (10219), 2233 states have internal predecessors, (10219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:41,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2234 states to 2234 states and 10219 transitions. [2021-07-13 20:29:41,156 INFO L78 Accepts]: Start accepts. Automaton has 2234 states and 10219 transitions. Word has length 29 [2021-07-13 20:29:41,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:41,156 INFO L482 AbstractCegarLoop]: Abstraction has 2234 states and 10219 transitions. [2021-07-13 20:29:41,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:41,156 INFO L276 IsEmpty]: Start isEmpty. Operand 2234 states and 10219 transitions. [2021-07-13 20:29:41,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:29:41,160 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:41,160 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:41,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable810,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:41,360 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:41,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:41,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1588303880, now seen corresponding path program 184 times [2021-07-13 20:29:41,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:41,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309657485] [2021-07-13 20:29:41,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:41,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:41,676 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:41,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:41,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309657485] [2021-07-13 20:29:41,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309657485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:41,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475646552] [2021-07-13 20:29:41,676 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:41,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:29:41,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:41,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:29:41,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:42,518 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:42,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475646552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:42,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:42,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:29:42,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817900756] [2021-07-13 20:29:42,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:29:42,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:42,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:29:42,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:29:42,519 INFO L87 Difference]: Start difference. First operand 2234 states and 10219 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:43,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:43,142 INFO L93 Difference]: Finished difference Result 2561 states and 11409 transitions. [2021-07-13 20:29:43,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:29:43,143 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:29:43,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:43,148 INFO L225 Difference]: With dead ends: 2561 [2021-07-13 20:29:43,148 INFO L226 Difference]: Without dead ends: 2547 [2021-07-13 20:29:43,148 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1261.4ms TimeCoverageRelationStatistics Valid=194, Invalid=1288, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:29:43,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2547 states. [2021-07-13 20:29:43,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2547 to 2320. [2021-07-13 20:29:43,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2320 states, 2319 states have (on average 4.567917205692108) internal successors, (10593), 2319 states have internal predecessors, (10593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:43,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 10593 transitions. [2021-07-13 20:29:43,184 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 10593 transitions. Word has length 29 [2021-07-13 20:29:43,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:43,184 INFO L482 AbstractCegarLoop]: Abstraction has 2320 states and 10593 transitions. [2021-07-13 20:29:43,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:43,184 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 10593 transitions. [2021-07-13 20:29:43,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:29:43,188 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:43,188 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:43,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable815 [2021-07-13 20:29:43,388 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:43,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:43,388 INFO L82 PathProgramCache]: Analyzing trace with hash 2105894528, now seen corresponding path program 185 times [2021-07-13 20:29:43,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:43,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361377827] [2021-07-13 20:29:43,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:43,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:43,798 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:43,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:43,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361377827] [2021-07-13 20:29:43,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361377827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:43,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755744997] [2021-07-13 20:29:43,798 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:43,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:29:43,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:43,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:29:43,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:44,465 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-07-13 20:29:44,810 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:44,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755744997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:44,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:44,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:29:44,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64263650] [2021-07-13 20:29:44,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:29:44,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:44,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:29:44,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:29:44,811 INFO L87 Difference]: Start difference. First operand 2320 states and 10593 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:45,454 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-07-13 20:29:46,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:46,115 INFO L93 Difference]: Finished difference Result 2477 states and 11087 transitions. [2021-07-13 20:29:46,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:29:46,116 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:29:46,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:46,121 INFO L225 Difference]: With dead ends: 2477 [2021-07-13 20:29:46,121 INFO L226 Difference]: Without dead ends: 2467 [2021-07-13 20:29:46,121 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 2116.4ms TimeCoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:29:46,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2467 states. [2021-07-13 20:29:46,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2467 to 2342. [2021-07-13 20:29:46,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2342 states, 2341 states have (on average 4.553182400683468) internal successors, (10659), 2341 states have internal predecessors, (10659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:46,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2342 states to 2342 states and 10659 transitions. [2021-07-13 20:29:46,156 INFO L78 Accepts]: Start accepts. Automaton has 2342 states and 10659 transitions. Word has length 29 [2021-07-13 20:29:46,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:46,156 INFO L482 AbstractCegarLoop]: Abstraction has 2342 states and 10659 transitions. [2021-07-13 20:29:46,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:46,156 INFO L276 IsEmpty]: Start isEmpty. Operand 2342 states and 10659 transitions. [2021-07-13 20:29:46,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:29:46,160 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:46,160 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:46,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable819,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:46,361 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:46,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:46,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1568449412, now seen corresponding path program 186 times [2021-07-13 20:29:46,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:46,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197363977] [2021-07-13 20:29:46,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:46,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:46,660 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:46,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:46,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197363977] [2021-07-13 20:29:46,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197363977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:46,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543879934] [2021-07-13 20:29:46,660 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:46,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:29:46,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:46,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:29:46,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:47,374 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:47,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543879934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:47,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:47,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:29:47,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419380701] [2021-07-13 20:29:47,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:29:47,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:47,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:29:47,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=847, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:29:47,375 INFO L87 Difference]: Start difference. First operand 2342 states and 10659 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:47,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:47,800 INFO L93 Difference]: Finished difference Result 2387 states and 10797 transitions. [2021-07-13 20:29:47,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:29:47,801 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:29:47,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:47,806 INFO L225 Difference]: With dead ends: 2387 [2021-07-13 20:29:47,806 INFO L226 Difference]: Without dead ends: 2382 [2021-07-13 20:29:47,806 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1050.6ms TimeCoverageRelationStatistics Valid=114, Invalid=1146, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:29:47,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2021-07-13 20:29:47,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 2340. [2021-07-13 20:29:47,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2340 states, 2339 states have (on average 4.555365540829414) internal successors, (10655), 2339 states have internal predecessors, (10655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:47,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2340 states to 2340 states and 10655 transitions. [2021-07-13 20:29:47,840 INFO L78 Accepts]: Start accepts. Automaton has 2340 states and 10655 transitions. Word has length 29 [2021-07-13 20:29:47,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:47,840 INFO L482 AbstractCegarLoop]: Abstraction has 2340 states and 10655 transitions. [2021-07-13 20:29:47,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:47,840 INFO L276 IsEmpty]: Start isEmpty. Operand 2340 states and 10655 transitions. [2021-07-13 20:29:47,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:29:47,843 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:47,844 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:48,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable825 [2021-07-13 20:29:48,044 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:48,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:48,044 INFO L82 PathProgramCache]: Analyzing trace with hash -345083362, now seen corresponding path program 187 times [2021-07-13 20:29:48,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:48,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158606863] [2021-07-13 20:29:48,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:48,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:48,332 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:48,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:48,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158606863] [2021-07-13 20:29:48,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158606863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:48,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696542286] [2021-07-13 20:29:48,332 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:48,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:48,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:29:48,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:49,284 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:49,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696542286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:49,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:49,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:29:49,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228012870] [2021-07-13 20:29:49,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:29:49,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:49,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:29:49,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=849, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:29:49,285 INFO L87 Difference]: Start difference. First operand 2340 states and 10655 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:49,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:49,849 INFO L93 Difference]: Finished difference Result 2400 states and 10829 transitions. [2021-07-13 20:29:49,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:29:49,849 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:29:49,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:49,854 INFO L225 Difference]: With dead ends: 2400 [2021-07-13 20:29:49,854 INFO L226 Difference]: Without dead ends: 2395 [2021-07-13 20:29:49,854 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1338.9ms TimeCoverageRelationStatistics Valid=121, Invalid=1285, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:29:49,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2395 states. [2021-07-13 20:29:49,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2395 to 2347. [2021-07-13 20:29:49,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2346 states have (on average 4.549872122762149) internal successors, (10674), 2346 states have internal predecessors, (10674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:49,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 10674 transitions. [2021-07-13 20:29:49,886 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 10674 transitions. Word has length 29 [2021-07-13 20:29:49,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:49,886 INFO L482 AbstractCegarLoop]: Abstraction has 2347 states and 10674 transitions. [2021-07-13 20:29:49,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:49,887 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 10674 transitions. [2021-07-13 20:29:49,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:29:49,890 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:49,890 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:50,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable827,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:50,091 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:50,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:50,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1330094878, now seen corresponding path program 188 times [2021-07-13 20:29:50,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:50,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107495752] [2021-07-13 20:29:50,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:50,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:50,369 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:50,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:50,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107495752] [2021-07-13 20:29:50,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107495752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:50,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995136563] [2021-07-13 20:29:50,370 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:50,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:29:50,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:50,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:29:50,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:51,186 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:51,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995136563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:51,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:51,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:29:51,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305241101] [2021-07-13 20:29:51,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:29:51,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:51,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:29:51,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=851, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:29:51,187 INFO L87 Difference]: Start difference. First operand 2347 states and 10674 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:51,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:51,717 INFO L93 Difference]: Finished difference Result 2388 states and 10783 transitions. [2021-07-13 20:29:51,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:29:51,717 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:29:51,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:51,722 INFO L225 Difference]: With dead ends: 2388 [2021-07-13 20:29:51,722 INFO L226 Difference]: Without dead ends: 2381 [2021-07-13 20:29:51,722 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1178.7ms TimeCoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:29:51,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2021-07-13 20:29:51,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 2349. [2021-07-13 20:29:51,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2349 states, 2348 states have (on average 4.5489778534923335) internal successors, (10681), 2348 states have internal predecessors, (10681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:51,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 10681 transitions. [2021-07-13 20:29:51,756 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 10681 transitions. Word has length 29 [2021-07-13 20:29:51,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:51,757 INFO L482 AbstractCegarLoop]: Abstraction has 2349 states and 10681 transitions. [2021-07-13 20:29:51,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:51,757 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 10681 transitions. [2021-07-13 20:29:51,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:29:51,760 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:51,760 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:51,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable830,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:51,961 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:51,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:51,961 INFO L82 PathProgramCache]: Analyzing trace with hash 762815330, now seen corresponding path program 189 times [2021-07-13 20:29:51,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:51,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541295724] [2021-07-13 20:29:51,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:51,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:52,263 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:52,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:52,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541295724] [2021-07-13 20:29:52,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541295724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:52,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289300266] [2021-07-13 20:29:52,263 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:52,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 20:29:52,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:52,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:29:52,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:53,239 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:53,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289300266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:53,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:53,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:29:53,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032798961] [2021-07-13 20:29:53,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:29:53,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:53,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:29:53,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=851, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:29:53,240 INFO L87 Difference]: Start difference. First operand 2349 states and 10681 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:54,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:54,212 INFO L93 Difference]: Finished difference Result 2416 states and 10917 transitions. [2021-07-13 20:29:54,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:29:54,212 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:29:54,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:54,217 INFO L225 Difference]: With dead ends: 2416 [2021-07-13 20:29:54,217 INFO L226 Difference]: Without dead ends: 2406 [2021-07-13 20:29:54,218 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1680.6ms TimeCoverageRelationStatistics Valid=135, Invalid=1505, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:29:54,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2406 states. [2021-07-13 20:29:54,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2406 to 2356. [2021-07-13 20:29:54,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2356 states, 2355 states have (on average 4.548619957537155) internal successors, (10712), 2355 states have internal predecessors, (10712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:54,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 10712 transitions. [2021-07-13 20:29:54,250 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 10712 transitions. Word has length 29 [2021-07-13 20:29:54,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:54,250 INFO L482 AbstractCegarLoop]: Abstraction has 2356 states and 10712 transitions. [2021-07-13 20:29:54,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:54,250 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 10712 transitions. [2021-07-13 20:29:54,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:29:54,253 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:54,253 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:54,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable833 [2021-07-13 20:29:54,454 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:54,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:54,454 INFO L82 PathProgramCache]: Analyzing trace with hash 659784136, now seen corresponding path program 190 times [2021-07-13 20:29:54,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:54,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154099181] [2021-07-13 20:29:54,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:54,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:54,609 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:29:54,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:54,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154099181] [2021-07-13 20:29:54,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154099181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:54,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474199697] [2021-07-13 20:29:54,610 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:54,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:29:54,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:54,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 20:29:54,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:54,939 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 [2021-07-13 20:29:54,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:54,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:54,976 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 [2021-07-13 20:29:54,976 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:55,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:55,010 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 [2021-07-13 20:29:55,011 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:55,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:55,042 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 [2021-07-13 20:29:55,043 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:55,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:55,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-13 20:29:55,074 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:113, output treesize:85 [2021-07-13 20:29:55,517 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 22 [2021-07-13 20:29:55,521 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:29:55,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474199697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:55,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:55,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 23 [2021-07-13 20:29:55,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587938735] [2021-07-13 20:29:55,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:29:55,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:55,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:29:55,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:29:55,522 INFO L87 Difference]: Start difference. First operand 2356 states and 10712 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:55,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:55,899 INFO L93 Difference]: Finished difference Result 3321 states and 14808 transitions. [2021-07-13 20:29:55,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:29:55,899 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:29:55,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:55,906 INFO L225 Difference]: With dead ends: 3321 [2021-07-13 20:29:55,906 INFO L226 Difference]: Without dead ends: 3288 [2021-07-13 20:29:55,907 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 818.5ms TimeCoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:29:55,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3288 states. [2021-07-13 20:29:55,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3288 to 2396. [2021-07-13 20:29:55,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2396 states, 2395 states have (on average 4.583298538622129) internal successors, (10977), 2395 states have internal predecessors, (10977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:55,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2396 states to 2396 states and 10977 transitions. [2021-07-13 20:29:55,949 INFO L78 Accepts]: Start accepts. Automaton has 2396 states and 10977 transitions. Word has length 29 [2021-07-13 20:29:55,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:55,949 INFO L482 AbstractCegarLoop]: Abstraction has 2396 states and 10977 transitions. [2021-07-13 20:29:55,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:55,949 INFO L276 IsEmpty]: Start isEmpty. Operand 2396 states and 10977 transitions. [2021-07-13 20:29:55,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:29:55,953 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:55,953 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:56,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable838,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:56,154 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:56,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:56,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1649573022, now seen corresponding path program 191 times [2021-07-13 20:29:56,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:56,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543640866] [2021-07-13 20:29:56,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:56,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:56,562 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:56,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:56,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543640866] [2021-07-13 20:29:56,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543640866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:56,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297008453] [2021-07-13 20:29:56,563 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:56,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:29:56,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:56,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:29:56,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:57,603 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:57,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297008453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:57,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:57,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:29:57,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419300246] [2021-07-13 20:29:57,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:29:57,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:57,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:29:57,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:29:57,604 INFO L87 Difference]: Start difference. First operand 2396 states and 10977 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:58,120 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-07-13 20:29:58,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:58,332 INFO L93 Difference]: Finished difference Result 2468 states and 11183 transitions. [2021-07-13 20:29:58,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:29:58,332 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:29:58,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:58,337 INFO L225 Difference]: With dead ends: 2468 [2021-07-13 20:29:58,337 INFO L226 Difference]: Without dead ends: 2452 [2021-07-13 20:29:58,337 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1635.5ms TimeCoverageRelationStatistics Valid=119, Invalid=1287, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:29:58,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2021-07-13 20:29:58,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 2414. [2021-07-13 20:29:58,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2414 states, 2413 states have (on average 4.571073352673021) internal successors, (11030), 2413 states have internal predecessors, (11030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:58,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 11030 transitions. [2021-07-13 20:29:58,371 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 11030 transitions. Word has length 29 [2021-07-13 20:29:58,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:58,372 INFO L482 AbstractCegarLoop]: Abstraction has 2414 states and 11030 transitions. [2021-07-13 20:29:58,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:58,372 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 11030 transitions. [2021-07-13 20:29:58,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:29:58,375 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:58,375 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:58,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable844 [2021-07-13 20:29:58,576 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:58,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:58,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1835368124, now seen corresponding path program 192 times [2021-07-13 20:29:58,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:58,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178328309] [2021-07-13 20:29:58,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:58,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:59,017 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:59,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:59,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178328309] [2021-07-13 20:29:59,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178328309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:59,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516087879] [2021-07-13 20:29:59,018 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:59,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:29:59,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:59,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:29:59,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:59,605 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-07-13 20:29:59,963 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:59,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516087879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:59,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:59,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:29:59,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718788559] [2021-07-13 20:29:59,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:29:59,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:59,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:29:59,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:29:59,964 INFO L87 Difference]: Start difference. First operand 2414 states and 11030 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:00,852 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-07-13 20:30:01,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:01,282 INFO L93 Difference]: Finished difference Result 2778 states and 12392 transitions. [2021-07-13 20:30:01,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:30:01,283 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:30:01,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:01,290 INFO L225 Difference]: With dead ends: 2778 [2021-07-13 20:30:01,290 INFO L226 Difference]: Without dead ends: 2763 [2021-07-13 20:30:01,291 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 2083.0ms TimeCoverageRelationStatistics Valid=221, Invalid=1671, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:30:01,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2763 states. [2021-07-13 20:30:01,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2763 to 2476. [2021-07-13 20:30:01,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2476 states, 2475 states have (on average 4.586262626262626) internal successors, (11351), 2475 states have internal predecessors, (11351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:01,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2476 states to 2476 states and 11351 transitions. [2021-07-13 20:30:01,332 INFO L78 Accepts]: Start accepts. Automaton has 2476 states and 11351 transitions. Word has length 29 [2021-07-13 20:30:01,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:01,332 INFO L482 AbstractCegarLoop]: Abstraction has 2476 states and 11351 transitions. [2021-07-13 20:30:01,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:01,332 INFO L276 IsEmpty]: Start isEmpty. Operand 2476 states and 11351 transitions. [2021-07-13 20:30:01,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:30:01,336 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:01,336 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:01,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable852,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:01,537 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:01,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:01,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1317777476, now seen corresponding path program 193 times [2021-07-13 20:30:01,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:01,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541642052] [2021-07-13 20:30:01,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:01,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:01,811 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:01,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:01,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541642052] [2021-07-13 20:30:01,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541642052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:01,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047323532] [2021-07-13 20:30:01,812 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:01,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:01,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:30:01,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:02,434 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-07-13 20:30:02,909 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:02,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047323532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:02,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:02,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:30:02,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561611696] [2021-07-13 20:30:02,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:30:02,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:02,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:30:02,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:30:02,910 INFO L87 Difference]: Start difference. First operand 2476 states and 11351 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:03,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:03,689 INFO L93 Difference]: Finished difference Result 2717 states and 12214 transitions. [2021-07-13 20:30:03,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:30:03,689 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:30:03,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:03,695 INFO L225 Difference]: With dead ends: 2717 [2021-07-13 20:30:03,695 INFO L226 Difference]: Without dead ends: 2698 [2021-07-13 20:30:03,695 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1568.4ms TimeCoverageRelationStatistics Valid=173, Invalid=1387, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:30:03,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2698 states. [2021-07-13 20:30:03,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2698 to 2508. [2021-07-13 20:30:03,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2508 states, 2507 states have (on average 4.594335859593139) internal successors, (11518), 2507 states have internal predecessors, (11518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:03,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2508 states to 2508 states and 11518 transitions. [2021-07-13 20:30:03,738 INFO L78 Accepts]: Start accepts. Automaton has 2508 states and 11518 transitions. Word has length 29 [2021-07-13 20:30:03,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:03,738 INFO L482 AbstractCegarLoop]: Abstraction has 2508 states and 11518 transitions. [2021-07-13 20:30:03,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:03,738 INFO L276 IsEmpty]: Start isEmpty. Operand 2508 states and 11518 transitions. [2021-07-13 20:30:03,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:30:03,742 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:03,742 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:03,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable859 [2021-07-13 20:30:03,942 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:03,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:03,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1438777063, now seen corresponding path program 194 times [2021-07-13 20:30:03,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:03,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933681123] [2021-07-13 20:30:03,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:03,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:04,252 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:04,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:04,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933681123] [2021-07-13 20:30:04,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933681123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:04,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114494846] [2021-07-13 20:30:04,252 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:04,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:30:04,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:04,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 20:30:04,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:04,887 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 [2021-07-13 20:30:04,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:04,891 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 [2021-07-13 20:30:04,892 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:04,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:04,929 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 [2021-07-13 20:30:04,930 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:04,932 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 [2021-07-13 20:30:04,933 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:04,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:04,964 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. [2021-07-13 20:30:04,964 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:109, output treesize:81 [2021-07-13 20:30:05,081 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:30:05,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114494846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:05,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:05,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 27 [2021-07-13 20:30:05,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760467414] [2021-07-13 20:30:05,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:30:05,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:05,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:30:05,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:30:05,082 INFO L87 Difference]: Start difference. First operand 2508 states and 11518 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:06,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:06,538 INFO L93 Difference]: Finished difference Result 5624 states and 23716 transitions. [2021-07-13 20:30:06,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:30:06,538 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:30:06,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:06,554 INFO L225 Difference]: With dead ends: 5624 [2021-07-13 20:30:06,554 INFO L226 Difference]: Without dead ends: 5507 [2021-07-13 20:30:06,554 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1713.8ms TimeCoverageRelationStatistics Valid=259, Invalid=1811, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:30:06,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5507 states. [2021-07-13 20:30:06,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5507 to 2890. [2021-07-13 20:30:06,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2890 states, 2889 states have (on average 4.747663551401869) internal successors, (13716), 2889 states have internal predecessors, (13716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:06,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2890 states to 2890 states and 13716 transitions. [2021-07-13 20:30:06,644 INFO L78 Accepts]: Start accepts. Automaton has 2890 states and 13716 transitions. Word has length 30 [2021-07-13 20:30:06,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:06,644 INFO L482 AbstractCegarLoop]: Abstraction has 2890 states and 13716 transitions. [2021-07-13 20:30:06,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:06,644 INFO L276 IsEmpty]: Start isEmpty. Operand 2890 states and 13716 transitions. [2021-07-13 20:30:06,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:30:06,649 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:06,649 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:06,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable866,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:06,853 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:06,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:06,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1972399915, now seen corresponding path program 195 times [2021-07-13 20:30:06,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:06,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836456818] [2021-07-13 20:30:06,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:06,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:07,369 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:07,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:07,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836456818] [2021-07-13 20:30:07,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836456818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:07,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080352845] [2021-07-13 20:30:07,369 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:07,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 20:30:07,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:07,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:30:07,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:08,396 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:08,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080352845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:08,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:08,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-13 20:30:08,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357498016] [2021-07-13 20:30:08,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:30:08,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:08,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:30:08,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:30:08,397 INFO L87 Difference]: Start difference. First operand 2890 states and 13716 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:09,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:09,112 INFO L93 Difference]: Finished difference Result 2970 states and 13926 transitions. [2021-07-13 20:30:09,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:30:09,112 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:30:09,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:09,118 INFO L225 Difference]: With dead ends: 2970 [2021-07-13 20:30:09,118 INFO L226 Difference]: Without dead ends: 2942 [2021-07-13 20:30:09,119 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1705.8ms TimeCoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:30:09,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2942 states. [2021-07-13 20:30:09,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2942 to 2916. [2021-07-13 20:30:09,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2916 states, 2915 states have (on average 4.72967409948542) internal successors, (13787), 2915 states have internal predecessors, (13787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:09,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2916 states to 2916 states and 13787 transitions. [2021-07-13 20:30:09,166 INFO L78 Accepts]: Start accepts. Automaton has 2916 states and 13787 transitions. Word has length 30 [2021-07-13 20:30:09,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:09,166 INFO L482 AbstractCegarLoop]: Abstraction has 2916 states and 13787 transitions. [2021-07-13 20:30:09,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:09,167 INFO L276 IsEmpty]: Start isEmpty. Operand 2916 states and 13787 transitions. [2021-07-13 20:30:09,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:30:09,171 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:09,171 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:09,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable871 [2021-07-13 20:30:09,371 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:09,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:09,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1663574255, now seen corresponding path program 196 times [2021-07-13 20:30:09,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:09,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156929198] [2021-07-13 20:30:09,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:09,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:09,814 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:09,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:09,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156929198] [2021-07-13 20:30:09,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156929198] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:09,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880055723] [2021-07-13 20:30:09,815 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:09,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:30:09,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:09,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:30:09,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:10,212 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-07-13 20:30:10,371 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-07-13 20:30:10,810 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:10,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880055723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:10,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:10,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-13 20:30:10,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605678163] [2021-07-13 20:30:10,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:30:10,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:10,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:30:10,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:30:10,811 INFO L87 Difference]: Start difference. First operand 2916 states and 13787 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:11,428 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-07-13 20:30:11,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:11,656 INFO L93 Difference]: Finished difference Result 2973 states and 13938 transitions. [2021-07-13 20:30:11,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:30:11,656 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:30:11,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:11,666 INFO L225 Difference]: With dead ends: 2973 [2021-07-13 20:30:11,666 INFO L226 Difference]: Without dead ends: 2964 [2021-07-13 20:30:11,666 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1700.9ms TimeCoverageRelationStatistics Valid=169, Invalid=1553, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:30:11,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2964 states. [2021-07-13 20:30:11,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2964 to 2916. [2021-07-13 20:30:11,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2916 states, 2915 states have (on average 4.72967409948542) internal successors, (13787), 2915 states have internal predecessors, (13787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:11,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2916 states to 2916 states and 13787 transitions. [2021-07-13 20:30:11,742 INFO L78 Accepts]: Start accepts. Automaton has 2916 states and 13787 transitions. Word has length 30 [2021-07-13 20:30:11,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:11,742 INFO L482 AbstractCegarLoop]: Abstraction has 2916 states and 13787 transitions. [2021-07-13 20:30:11,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:11,742 INFO L276 IsEmpty]: Start isEmpty. Operand 2916 states and 13787 transitions. [2021-07-13 20:30:11,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:30:11,747 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:11,747 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:11,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable876,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:11,948 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:11,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:11,948 INFO L82 PathProgramCache]: Analyzing trace with hash -152141107, now seen corresponding path program 197 times [2021-07-13 20:30:11,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:11,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299507968] [2021-07-13 20:30:11,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:11,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:12,237 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:12,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:12,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299507968] [2021-07-13 20:30:12,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299507968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:12,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413404881] [2021-07-13 20:30:12,237 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:12,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:30:12,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:12,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:30:12,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:12,959 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 [2021-07-13 20:30:12,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:12,964 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 [2021-07-13 20:30:12,965 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:13,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:13,016 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 [2021-07-13 20:30:13,017 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:13,020 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 [2021-07-13 20:30:13,021 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:13,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:13,067 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. [2021-07-13 20:30:13,067 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:147, output treesize:119 [2021-07-13 20:30:13,235 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:30:13,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413404881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:13,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:13,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-07-13 20:30:13,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692194075] [2021-07-13 20:30:13,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:30:13,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:13,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:30:13,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:30:13,235 INFO L87 Difference]: Start difference. First operand 2916 states and 13787 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:13,769 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2021-07-13 20:30:14,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:14,133 INFO L93 Difference]: Finished difference Result 2877 states and 13430 transitions. [2021-07-13 20:30:14,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:30:14,134 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:30:14,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:14,140 INFO L225 Difference]: With dead ends: 2877 [2021-07-13 20:30:14,140 INFO L226 Difference]: Without dead ends: 2867 [2021-07-13 20:30:14,140 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1525.5ms TimeCoverageRelationStatistics Valid=214, Invalid=1346, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:30:14,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2867 states. [2021-07-13 20:30:14,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2867 to 2833. [2021-07-13 20:30:14,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2833 states, 2832 states have (on average 4.709039548022599) internal successors, (13336), 2832 states have internal predecessors, (13336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:14,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2833 states to 2833 states and 13336 transitions. [2021-07-13 20:30:14,181 INFO L78 Accepts]: Start accepts. Automaton has 2833 states and 13336 transitions. Word has length 30 [2021-07-13 20:30:14,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:14,181 INFO L482 AbstractCegarLoop]: Abstraction has 2833 states and 13336 transitions. [2021-07-13 20:30:14,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:14,182 INFO L276 IsEmpty]: Start isEmpty. Operand 2833 states and 13336 transitions. [2021-07-13 20:30:14,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:30:14,186 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:14,186 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:14,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable880,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:14,387 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:14,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:14,387 INFO L82 PathProgramCache]: Analyzing trace with hash 529015159, now seen corresponding path program 198 times [2021-07-13 20:30:14,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:14,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433023613] [2021-07-13 20:30:14,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:14,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:14,705 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:14,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:14,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433023613] [2021-07-13 20:30:14,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433023613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:14,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708703841] [2021-07-13 20:30:14,706 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:14,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 20:30:14,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:14,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:30:14,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:15,587 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:15,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708703841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:15,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:15,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-13 20:30:15,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490548420] [2021-07-13 20:30:15,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:30:15,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:15,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:30:15,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:30:15,588 INFO L87 Difference]: Start difference. First operand 2833 states and 13336 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:16,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:16,632 INFO L93 Difference]: Finished difference Result 2924 states and 13557 transitions. [2021-07-13 20:30:16,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:30:16,632 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:30:16,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:16,640 INFO L225 Difference]: With dead ends: 2924 [2021-07-13 20:30:16,640 INFO L226 Difference]: Without dead ends: 2909 [2021-07-13 20:30:16,640 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1720.9ms TimeCoverageRelationStatistics Valid=252, Invalid=1910, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:30:16,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2909 states. [2021-07-13 20:30:16,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2909 to 2842. [2021-07-13 20:30:16,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2842 states, 2841 states have (on average 4.702569517775431) internal successors, (13360), 2841 states have internal predecessors, (13360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:16,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 13360 transitions. [2021-07-13 20:30:16,685 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 13360 transitions. Word has length 30 [2021-07-13 20:30:16,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:16,685 INFO L482 AbstractCegarLoop]: Abstraction has 2842 states and 13360 transitions. [2021-07-13 20:30:16,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:16,685 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 13360 transitions. [2021-07-13 20:30:16,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:30:16,689 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:16,689 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:16,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable886,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:16,890 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:16,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:16,890 INFO L82 PathProgramCache]: Analyzing trace with hash -2045937511, now seen corresponding path program 199 times [2021-07-13 20:30:16,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:16,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249969204] [2021-07-13 20:30:16,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:16,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:17,165 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:17,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:17,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249969204] [2021-07-13 20:30:17,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249969204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:17,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619305265] [2021-07-13 20:30:17,165 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:17,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:17,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:30:17,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:18,047 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:18,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619305265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:18,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:18,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-13 20:30:18,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979446822] [2021-07-13 20:30:18,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:30:18,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:18,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:30:18,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:30:18,048 INFO L87 Difference]: Start difference. First operand 2842 states and 13360 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:18,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:18,505 INFO L93 Difference]: Finished difference Result 2998 states and 13825 transitions. [2021-07-13 20:30:18,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:30:18,505 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:30:18,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:18,512 INFO L225 Difference]: With dead ends: 2998 [2021-07-13 20:30:18,512 INFO L226 Difference]: Without dead ends: 2980 [2021-07-13 20:30:18,512 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1170.9ms TimeCoverageRelationStatistics Valid=174, Invalid=1308, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:30:18,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2980 states. [2021-07-13 20:30:18,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2980 to 2865. [2021-07-13 20:30:18,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2865 states, 2864 states have (on average 4.696927374301676) internal successors, (13452), 2864 states have internal predecessors, (13452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:18,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 13452 transitions. [2021-07-13 20:30:18,557 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 13452 transitions. Word has length 30 [2021-07-13 20:30:18,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:18,557 INFO L482 AbstractCegarLoop]: Abstraction has 2865 states and 13452 transitions. [2021-07-13 20:30:18,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:18,557 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 13452 transitions. [2021-07-13 20:30:18,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:30:18,561 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:18,561 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:18,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable890,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:18,762 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:18,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:18,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1843232981, now seen corresponding path program 200 times [2021-07-13 20:30:18,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:18,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232020839] [2021-07-13 20:30:18,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:18,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:19,244 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:19,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:19,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232020839] [2021-07-13 20:30:19,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232020839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:19,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216415195] [2021-07-13 20:30:19,244 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:19,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:30:19,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:19,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:30:19,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:20,130 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:20,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216415195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:20,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:20,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-13 20:30:20,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597380371] [2021-07-13 20:30:20,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:30:20,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:20,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:30:20,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:30:20,131 INFO L87 Difference]: Start difference. First operand 2865 states and 13452 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:20,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:20,926 INFO L93 Difference]: Finished difference Result 2907 states and 13565 transitions. [2021-07-13 20:30:20,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:30:20,927 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:30:20,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:20,934 INFO L225 Difference]: With dead ends: 2907 [2021-07-13 20:30:20,934 INFO L226 Difference]: Without dead ends: 2898 [2021-07-13 20:30:20,935 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1622.4ms TimeCoverageRelationStatistics Valid=168, Invalid=1638, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:30:20,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2898 states. [2021-07-13 20:30:20,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2898 to 2860. [2021-07-13 20:30:20,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2860 states, 2859 states have (on average 4.7037425673312345) internal successors, (13448), 2859 states have internal predecessors, (13448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:20,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2860 states to 2860 states and 13448 transitions. [2021-07-13 20:30:20,987 INFO L78 Accepts]: Start accepts. Automaton has 2860 states and 13448 transitions. Word has length 30 [2021-07-13 20:30:20,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:20,987 INFO L482 AbstractCegarLoop]: Abstraction has 2860 states and 13448 transitions. [2021-07-13 20:30:20,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:20,987 INFO L276 IsEmpty]: Start isEmpty. Operand 2860 states and 13448 transitions. [2021-07-13 20:30:20,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:30:20,992 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:20,992 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:21,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable893 [2021-07-13 20:30:21,192 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:21,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:21,192 INFO L82 PathProgramCache]: Analyzing trace with hash -2006531273, now seen corresponding path program 201 times [2021-07-13 20:30:21,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:21,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459815072] [2021-07-13 20:30:21,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:21,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:21,500 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:21,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:21,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459815072] [2021-07-13 20:30:21,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459815072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:21,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848611651] [2021-07-13 20:30:21,500 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:21,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 20:30:21,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:21,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:30:21,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:21,966 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-07-13 20:30:22,411 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:22,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848611651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:22,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:22,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-13 20:30:22,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322983939] [2021-07-13 20:30:22,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:30:22,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:22,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:30:22,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:30:22,413 INFO L87 Difference]: Start difference. First operand 2860 states and 13448 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:23,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:23,002 INFO L93 Difference]: Finished difference Result 3156 states and 14386 transitions. [2021-07-13 20:30:23,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:30:23,003 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:30:23,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:23,010 INFO L225 Difference]: With dead ends: 3156 [2021-07-13 20:30:23,010 INFO L226 Difference]: Without dead ends: 3137 [2021-07-13 20:30:23,011 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1283.2ms TimeCoverageRelationStatistics Valid=173, Invalid=1309, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:30:23,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3137 states. [2021-07-13 20:30:23,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3137 to 2892. [2021-07-13 20:30:23,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2892 states, 2891 states have (on average 4.698374264960221) internal successors, (13583), 2891 states have internal predecessors, (13583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:23,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2892 states to 2892 states and 13583 transitions. [2021-07-13 20:30:23,060 INFO L78 Accepts]: Start accepts. Automaton has 2892 states and 13583 transitions. Word has length 30 [2021-07-13 20:30:23,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:23,060 INFO L482 AbstractCegarLoop]: Abstraction has 2892 states and 13583 transitions. [2021-07-13 20:30:23,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:23,060 INFO L276 IsEmpty]: Start isEmpty. Operand 2892 states and 13583 transitions. [2021-07-13 20:30:23,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:30:23,064 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:23,064 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:23,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable897,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:23,265 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:23,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:23,266 INFO L82 PathProgramCache]: Analyzing trace with hash 472720661, now seen corresponding path program 202 times [2021-07-13 20:30:23,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:23,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799861461] [2021-07-13 20:30:23,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:23,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:23,542 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:23,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:23,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799861461] [2021-07-13 20:30:23,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799861461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:23,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068058325] [2021-07-13 20:30:23,543 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:23,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:30:23,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:23,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 20:30:23,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:23,996 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 [2021-07-13 20:30:23,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:24,000 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 [2021-07-13 20:30:24,001 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:24,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:24,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-13 20:30:24,042 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:24,045 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 [2021-07-13 20:30:24,046 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:24,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:24,083 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. [2021-07-13 20:30:24,084 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:109, output treesize:81 [2021-07-13 20:30:24,207 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:30:24,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068058325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:24,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:24,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 25 [2021-07-13 20:30:24,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734584042] [2021-07-13 20:30:24,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:30:24,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:24,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:30:24,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:30:24,208 INFO L87 Difference]: Start difference. First operand 2892 states and 13583 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:29,050 WARN L205 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-07-13 20:30:33,165 WARN L205 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-07-13 20:30:33,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:33,548 INFO L93 Difference]: Finished difference Result 3764 states and 16651 transitions. [2021-07-13 20:30:33,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:30:33,549 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:30:33,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:33,574 INFO L225 Difference]: With dead ends: 3764 [2021-07-13 20:30:33,575 INFO L226 Difference]: Without dead ends: 3719 [2021-07-13 20:30:33,575 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 9510.5ms TimeCoverageRelationStatistics Valid=197, Invalid=1443, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:30:33,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3719 states. [2021-07-13 20:30:33,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3719 to 3063. [2021-07-13 20:30:33,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 3062 states have (on average 4.732854343566297) internal successors, (14492), 3062 states have internal predecessors, (14492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:33,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 14492 transitions. [2021-07-13 20:30:33,633 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 14492 transitions. Word has length 30 [2021-07-13 20:30:33,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:33,633 INFO L482 AbstractCegarLoop]: Abstraction has 3063 states and 14492 transitions. [2021-07-13 20:30:33,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:33,633 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 14492 transitions. [2021-07-13 20:30:33,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:30:33,637 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:33,638 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:33,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable900,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:33,838 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:33,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:33,838 INFO L82 PathProgramCache]: Analyzing trace with hash -968323313, now seen corresponding path program 203 times [2021-07-13 20:30:33,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:33,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104538543] [2021-07-13 20:30:33,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:33,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:34,158 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:34,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:34,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104538543] [2021-07-13 20:30:34,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104538543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:34,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297005738] [2021-07-13 20:30:34,158 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:34,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 20:30:34,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:34,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:30:34,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:34,731 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-07-13 20:30:34,904 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 [2021-07-13 20:30:34,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:34,909 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 [2021-07-13 20:30:34,909 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:34,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:34,958 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 [2021-07-13 20:30:34,959 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:34,962 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 [2021-07-13 20:30:34,963 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:35,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:35,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2021-07-13 20:30:35,009 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:133, output treesize:105 [2021-07-13 20:30:37,089 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 65 [2021-07-13 20:30:37,147 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:30:37,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297005738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:37,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:37,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 25 [2021-07-13 20:30:37,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601505912] [2021-07-13 20:30:37,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:30:37,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:37,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:30:37,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:30:37,148 INFO L87 Difference]: Start difference. First operand 3063 states and 14492 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:37,710 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2021-07-13 20:30:41,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:41,878 INFO L93 Difference]: Finished difference Result 3155 states and 14639 transitions. [2021-07-13 20:30:41,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:30:41,879 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:30:41,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:41,886 INFO L225 Difference]: With dead ends: 3155 [2021-07-13 20:30:41,886 INFO L226 Difference]: Without dead ends: 3139 [2021-07-13 20:30:41,886 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 3359.4ms TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:30:41,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3139 states. [2021-07-13 20:30:41,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3139 to 3053. [2021-07-13 20:30:41,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3053 states, 3052 states have (on average 4.734272608125819) internal successors, (14449), 3052 states have internal predecessors, (14449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:41,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 14449 transitions. [2021-07-13 20:30:41,934 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 14449 transitions. Word has length 30 [2021-07-13 20:30:41,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:41,934 INFO L482 AbstractCegarLoop]: Abstraction has 3053 states and 14449 transitions. [2021-07-13 20:30:41,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:41,934 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 14449 transitions. [2021-07-13 20:30:41,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:30:41,939 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:41,939 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:42,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable904,243 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:42,139 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:42,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:42,140 INFO L82 PathProgramCache]: Analyzing trace with hash -805587235, now seen corresponding path program 204 times [2021-07-13 20:30:42,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:42,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340076991] [2021-07-13 20:30:42,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:42,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:42,582 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:42,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:42,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340076991] [2021-07-13 20:30:42,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340076991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:42,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106351147] [2021-07-13 20:30:42,582 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:42,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 20:30:42,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:42,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:30:42,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:43,371 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:43,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106351147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:43,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:43,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-13 20:30:43,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984526940] [2021-07-13 20:30:43,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:30:43,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:43,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:30:43,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:30:43,372 INFO L87 Difference]: Start difference. First operand 3053 states and 14449 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:45,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:45,078 INFO L93 Difference]: Finished difference Result 3587 states and 16130 transitions. [2021-07-13 20:30:45,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:30:45,079 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:30:45,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:45,087 INFO L225 Difference]: With dead ends: 3587 [2021-07-13 20:30:45,087 INFO L226 Difference]: Without dead ends: 3548 [2021-07-13 20:30:45,087 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 2126.5ms TimeCoverageRelationStatistics Valid=257, Invalid=2605, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:30:45,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3548 states. [2021-07-13 20:30:45,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3548 to 3155. [2021-07-13 20:30:45,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3155 states, 3154 states have (on average 4.734939759036145) internal successors, (14934), 3154 states have internal predecessors, (14934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:45,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3155 states to 3155 states and 14934 transitions. [2021-07-13 20:30:45,140 INFO L78 Accepts]: Start accepts. Automaton has 3155 states and 14934 transitions. Word has length 30 [2021-07-13 20:30:45,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:45,140 INFO L482 AbstractCegarLoop]: Abstraction has 3155 states and 14934 transitions. [2021-07-13 20:30:45,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:45,140 INFO L276 IsEmpty]: Start isEmpty. Operand 3155 states and 14934 transitions. [2021-07-13 20:30:45,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:30:45,145 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:45,145 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:45,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable910 [2021-07-13 20:30:45,345 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:45,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:45,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1211384039, now seen corresponding path program 205 times [2021-07-13 20:30:45,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:45,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446227379] [2021-07-13 20:30:45,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:45,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:45,808 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:45,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:45,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446227379] [2021-07-13 20:30:45,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446227379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:45,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874900840] [2021-07-13 20:30:45,809 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:45,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:45,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:30:45,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:46,726 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:46,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874900840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:46,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:46,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-13 20:30:46,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421402360] [2021-07-13 20:30:46,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:30:46,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:46,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:30:46,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=967, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:30:46,727 INFO L87 Difference]: Start difference. First operand 3155 states and 14934 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:47,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:47,706 INFO L93 Difference]: Finished difference Result 3231 states and 15150 transitions. [2021-07-13 20:30:47,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:30:47,706 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:30:47,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:47,713 INFO L225 Difference]: With dead ends: 3231 [2021-07-13 20:30:47,713 INFO L226 Difference]: Without dead ends: 3213 [2021-07-13 20:30:47,714 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 1792.2ms TimeCoverageRelationStatistics Valid=159, Invalid=1821, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:30:47,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3213 states. [2021-07-13 20:30:47,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3213 to 3160. [2021-07-13 20:30:47,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3160 states, 3159 states have (on average 4.733459955682178) internal successors, (14953), 3159 states have internal predecessors, (14953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:47,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3160 states to 3160 states and 14953 transitions. [2021-07-13 20:30:47,761 INFO L78 Accepts]: Start accepts. Automaton has 3160 states and 14953 transitions. Word has length 30 [2021-07-13 20:30:47,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:47,761 INFO L482 AbstractCegarLoop]: Abstraction has 3160 states and 14953 transitions. [2021-07-13 20:30:47,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:47,761 INFO L276 IsEmpty]: Start isEmpty. Operand 3160 states and 14953 transitions. [2021-07-13 20:30:47,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:30:47,766 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:47,766 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:47,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable913 [2021-07-13 20:30:47,966 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:47,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:47,966 INFO L82 PathProgramCache]: Analyzing trace with hash 308768783, now seen corresponding path program 206 times [2021-07-13 20:30:47,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:47,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955362868] [2021-07-13 20:30:47,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:47,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:48,127 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:30:48,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:48,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955362868] [2021-07-13 20:30:48,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955362868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:48,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823452728] [2021-07-13 20:30:48,127 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:48,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:30:48,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:48,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:30:48,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:48,885 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 [2021-07-13 20:30:48,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:48,890 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 [2021-07-13 20:30:48,891 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:48,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:48,951 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 [2021-07-13 20:30:48,952 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:48,956 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 [2021-07-13 20:30:48,957 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:49,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:49,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2021-07-13 20:30:49,016 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:143, output treesize:115 [2021-07-13 20:30:49,161 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:30:49,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823452728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:49,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:49,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2021-07-13 20:30:49,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877882997] [2021-07-13 20:30:49,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:30:49,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:49,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:30:49,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:30:49,162 INFO L87 Difference]: Start difference. First operand 3160 states and 14953 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:53,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:53,580 INFO L93 Difference]: Finished difference Result 3222 states and 15004 transitions. [2021-07-13 20:30:53,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:30:53,580 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:30:53,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:53,587 INFO L225 Difference]: With dead ends: 3222 [2021-07-13 20:30:53,587 INFO L226 Difference]: Without dead ends: 3214 [2021-07-13 20:30:53,587 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 977.7ms TimeCoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:30:53,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3214 states. [2021-07-13 20:30:53,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3214 to 3123. [2021-07-13 20:30:53,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3123 states, 3122 states have (on average 4.721652786675208) internal successors, (14741), 3122 states have internal predecessors, (14741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:53,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3123 states to 3123 states and 14741 transitions. [2021-07-13 20:30:53,634 INFO L78 Accepts]: Start accepts. Automaton has 3123 states and 14741 transitions. Word has length 30 [2021-07-13 20:30:53,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:53,634 INFO L482 AbstractCegarLoop]: Abstraction has 3123 states and 14741 transitions. [2021-07-13 20:30:53,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:53,635 INFO L276 IsEmpty]: Start isEmpty. Operand 3123 states and 14741 transitions. [2021-07-13 20:30:53,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:30:53,639 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:53,639 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:53,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable916,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:53,839 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:53,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:53,840 INFO L82 PathProgramCache]: Analyzing trace with hash 65708057, now seen corresponding path program 207 times [2021-07-13 20:30:53,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:53,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588115037] [2021-07-13 20:30:53,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:53,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:54,163 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:54,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:54,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588115037] [2021-07-13 20:30:54,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588115037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:54,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672795716] [2021-07-13 20:30:54,164 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:54,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 20:30:54,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:54,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:30:54,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:54,673 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-07-13 20:30:55,063 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:55,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672795716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:55,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:55,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-13 20:30:55,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725538194] [2021-07-13 20:30:55,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:30:55,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:55,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:30:55,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:30:55,064 INFO L87 Difference]: Start difference. First operand 3123 states and 14741 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:55,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:55,529 INFO L93 Difference]: Finished difference Result 3173 states and 14878 transitions. [2021-07-13 20:30:55,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:30:55,529 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:30:55,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:55,536 INFO L225 Difference]: With dead ends: 3173 [2021-07-13 20:30:55,536 INFO L226 Difference]: Without dead ends: 3164 [2021-07-13 20:30:55,536 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1258.5ms TimeCoverageRelationStatistics Valid=150, Invalid=1332, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:30:55,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3164 states. [2021-07-13 20:30:55,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3164 to 3120. [2021-07-13 20:30:55,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3120 states, 3119 states have (on average 4.727476755370311) internal successors, (14745), 3119 states have internal predecessors, (14745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:55,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3120 states to 3120 states and 14745 transitions. [2021-07-13 20:30:55,582 INFO L78 Accepts]: Start accepts. Automaton has 3120 states and 14745 transitions. Word has length 30 [2021-07-13 20:30:55,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:55,582 INFO L482 AbstractCegarLoop]: Abstraction has 3120 states and 14745 transitions. [2021-07-13 20:30:55,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:55,582 INFO L276 IsEmpty]: Start isEmpty. Operand 3120 states and 14745 transitions. [2021-07-13 20:30:55,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:30:55,586 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:55,587 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:55,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable921 [2021-07-13 20:30:55,790 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:55,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:55,790 INFO L82 PathProgramCache]: Analyzing trace with hash -340088747, now seen corresponding path program 208 times [2021-07-13 20:30:55,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:55,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431974843] [2021-07-13 20:30:55,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:55,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:56,097 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:56,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:56,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431974843] [2021-07-13 20:30:56,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431974843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:56,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187404099] [2021-07-13 20:30:56,098 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:56,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:30:56,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:56,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:30:56,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:56,626 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-07-13 20:30:57,138 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:57,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187404099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:57,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:57,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-13 20:30:57,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748247921] [2021-07-13 20:30:57,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:30:57,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:57,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:30:57,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:30:57,139 INFO L87 Difference]: Start difference. First operand 3120 states and 14745 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:57,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:57,930 INFO L93 Difference]: Finished difference Result 3224 states and 15081 transitions. [2021-07-13 20:30:57,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:30:57,931 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:30:57,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:57,938 INFO L225 Difference]: With dead ends: 3224 [2021-07-13 20:30:57,938 INFO L226 Difference]: Without dead ends: 3215 [2021-07-13 20:30:57,938 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1574.7ms TimeCoverageRelationStatistics Valid=200, Invalid=1606, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:30:57,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3215 states. [2021-07-13 20:30:57,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3215 to 3107. [2021-07-13 20:30:57,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3107 states, 3106 states have (on average 4.74275595621378) internal successors, (14731), 3106 states have internal predecessors, (14731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:57,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3107 states to 3107 states and 14731 transitions. [2021-07-13 20:30:57,986 INFO L78 Accepts]: Start accepts. Automaton has 3107 states and 14731 transitions. Word has length 30 [2021-07-13 20:30:57,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:57,986 INFO L482 AbstractCegarLoop]: Abstraction has 3107 states and 14731 transitions. [2021-07-13 20:30:57,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:57,986 INFO L276 IsEmpty]: Start isEmpty. Operand 3107 states and 14731 transitions. [2021-07-13 20:30:57,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:30:57,990 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:57,990 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:58,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable925,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:58,191 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:58,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:58,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1642624171, now seen corresponding path program 209 times [2021-07-13 20:30:58,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:58,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443126486] [2021-07-13 20:30:58,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:58,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:58,479 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:30:58,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:58,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443126486] [2021-07-13 20:30:58,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443126486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:58,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312520186] [2021-07-13 20:30:58,479 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:58,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:30:58,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:58,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:30:58,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:58,923 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-07-13 20:30:59,779 WARN L205 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2021-07-13 20:31:00,095 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 [2021-07-13 20:31:00,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:00,100 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 [2021-07-13 20:31:00,100 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:00,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:00,157 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 [2021-07-13 20:31:00,158 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:00,161 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 [2021-07-13 20:31:00,162 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:00,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:00,215 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. [2021-07-13 20:31:00,215 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:157, output treesize:129 [2021-07-13 20:31:04,483 WARN L205 SmtUtils]: Spent 4.05 s on a formula simplification that was a NOOP. DAG size: 63 [2021-07-13 20:31:04,573 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:04,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312520186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:04,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:04,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-07-13 20:31:04,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494739841] [2021-07-13 20:31:04,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:31:04,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:04,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:31:04,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:31:04,574 INFO L87 Difference]: Start difference. First operand 3107 states and 14731 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:07,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:07,129 INFO L93 Difference]: Finished difference Result 3919 states and 17589 transitions. [2021-07-13 20:31:07,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:31:07,130 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:31:07,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:07,142 INFO L225 Difference]: With dead ends: 3919 [2021-07-13 20:31:07,142 INFO L226 Difference]: Without dead ends: 3898 [2021-07-13 20:31:07,142 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 6138.4ms TimeCoverageRelationStatistics Valid=197, Invalid=993, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:31:07,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3898 states. [2021-07-13 20:31:07,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3898 to 2894. [2021-07-13 20:31:07,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2894 states, 2893 states have (on average 4.713100587625302) internal successors, (13635), 2893 states have internal predecessors, (13635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:07,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2894 states to 2894 states and 13635 transitions. [2021-07-13 20:31:07,218 INFO L78 Accepts]: Start accepts. Automaton has 2894 states and 13635 transitions. Word has length 30 [2021-07-13 20:31:07,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:07,218 INFO L482 AbstractCegarLoop]: Abstraction has 2894 states and 13635 transitions. [2021-07-13 20:31:07,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:07,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2894 states and 13635 transitions. [2021-07-13 20:31:07,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:31:07,223 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:07,223 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:07,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable931 [2021-07-13 20:31:07,424 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:07,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:07,424 INFO L82 PathProgramCache]: Analyzing trace with hash 2118720273, now seen corresponding path program 210 times [2021-07-13 20:31:07,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:07,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804113648] [2021-07-13 20:31:07,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:07,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:07,793 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:07,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:07,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804113648] [2021-07-13 20:31:07,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804113648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:07,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140902530] [2021-07-13 20:31:07,793 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:07,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:31:07,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:07,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:31:07,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:08,242 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-07-13 20:31:08,571 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-07-13 20:31:08,945 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:08,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140902530] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:08,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:08,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-13 20:31:08,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915868781] [2021-07-13 20:31:08,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:31:08,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:08,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:31:08,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:31:08,946 INFO L87 Difference]: Start difference. First operand 2894 states and 13635 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:09,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:09,516 INFO L93 Difference]: Finished difference Result 2935 states and 13749 transitions. [2021-07-13 20:31:09,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:31:09,516 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:31:09,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:09,524 INFO L225 Difference]: With dead ends: 2935 [2021-07-13 20:31:09,524 INFO L226 Difference]: Without dead ends: 2927 [2021-07-13 20:31:09,524 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1439.3ms TimeCoverageRelationStatistics Valid=114, Invalid=1218, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:31:09,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2927 states. [2021-07-13 20:31:09,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2927 to 2884. [2021-07-13 20:31:09,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2884 states, 2883 states have (on average 4.722858133888311) internal successors, (13616), 2883 states have internal predecessors, (13616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:09,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2884 states to 2884 states and 13616 transitions. [2021-07-13 20:31:09,602 INFO L78 Accepts]: Start accepts. Automaton has 2884 states and 13616 transitions. Word has length 30 [2021-07-13 20:31:09,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:09,602 INFO L482 AbstractCegarLoop]: Abstraction has 2884 states and 13616 transitions. [2021-07-13 20:31:09,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:09,602 INFO L276 IsEmpty]: Start isEmpty. Operand 2884 states and 13616 transitions. [2021-07-13 20:31:09,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:31:09,607 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:09,607 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:09,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable941 [2021-07-13 20:31:09,808 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:09,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:09,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1459727147, now seen corresponding path program 211 times [2021-07-13 20:31:09,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:09,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350788666] [2021-07-13 20:31:09,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:09,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:10,388 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:10,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:10,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350788666] [2021-07-13 20:31:10,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350788666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:10,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338572168] [2021-07-13 20:31:10,388 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 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:10,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:10,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:31:10,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:11,006 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-07-13 20:31:11,544 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:11,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338572168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:11,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:11,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-13 20:31:11,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127104246] [2021-07-13 20:31:11,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:31:11,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:11,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:31:11,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:31:11,545 INFO L87 Difference]: Start difference. First operand 2884 states and 13616 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:12,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:12,688 INFO L93 Difference]: Finished difference Result 2956 states and 13808 transitions. [2021-07-13 20:31:12,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:31:12,689 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:31:12,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:12,695 INFO L225 Difference]: With dead ends: 2956 [2021-07-13 20:31:12,695 INFO L226 Difference]: Without dead ends: 2951 [2021-07-13 20:31:12,695 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 2076.9ms TimeCoverageRelationStatistics Valid=164, Invalid=1728, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:31:12,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-07-13 20:31:12,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2868. [2021-07-13 20:31:12,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2868 states, 2867 states have (on average 4.732472968259505) internal successors, (13568), 2867 states have internal predecessors, (13568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:12,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2868 states to 2868 states and 13568 transitions. [2021-07-13 20:31:12,737 INFO L78 Accepts]: Start accepts. Automaton has 2868 states and 13568 transitions. Word has length 30 [2021-07-13 20:31:12,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:12,737 INFO L482 AbstractCegarLoop]: Abstraction has 2868 states and 13568 transitions. [2021-07-13 20:31:12,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:12,738 INFO L276 IsEmpty]: Start isEmpty. Operand 2868 states and 13568 transitions. [2021-07-13 20:31:12,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:31:12,741 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:12,742 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:12,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable947,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:12,942 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:12,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:12,942 INFO L82 PathProgramCache]: Analyzing trace with hash -355988215, now seen corresponding path program 212 times [2021-07-13 20:31:12,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:12,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480929722] [2021-07-13 20:31:12,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:12,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:13,225 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:31:13,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:13,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480929722] [2021-07-13 20:31:13,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480929722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:13,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540362879] [2021-07-13 20:31:13,225 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 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:13,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:31:13,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:13,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:31:13,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:13,910 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-07-13 20:31:14,084 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 [2021-07-13 20:31:14,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:14,089 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 [2021-07-13 20:31:14,090 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:14,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:14,146 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 [2021-07-13 20:31:14,147 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:14,150 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 [2021-07-13 20:31:14,151 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:14,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:14,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2021-07-13 20:31:14,206 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:143, output treesize:115 [2021-07-13 20:31:14,383 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:31:14,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540362879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:14,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:14,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 25 [2021-07-13 20:31:14,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098556849] [2021-07-13 20:31:14,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:31:14,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:14,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:31:14,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:31:14,384 INFO L87 Difference]: Start difference. First operand 2868 states and 13568 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:15,180 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-07-13 20:31:15,440 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-07-13 20:31:17,596 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2021-07-13 20:31:19,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:19,296 INFO L93 Difference]: Finished difference Result 3055 states and 13736 transitions. [2021-07-13 20:31:19,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:31:19,297 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:31:19,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:19,303 INFO L225 Difference]: With dead ends: 3055 [2021-07-13 20:31:19,303 INFO L226 Difference]: Without dead ends: 3013 [2021-07-13 20:31:19,304 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 1981.8ms TimeCoverageRelationStatistics Valid=246, Invalid=1560, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:31:19,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3013 states. [2021-07-13 20:31:19,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3013 to 2785. [2021-07-13 20:31:19,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2785 states, 2784 states have (on average 4.704741379310345) internal successors, (13098), 2784 states have internal predecessors, (13098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:19,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2785 states to 2785 states and 13098 transitions. [2021-07-13 20:31:19,352 INFO L78 Accepts]: Start accepts. Automaton has 2785 states and 13098 transitions. Word has length 30 [2021-07-13 20:31:19,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:19,352 INFO L482 AbstractCegarLoop]: Abstraction has 2785 states and 13098 transitions. [2021-07-13 20:31:19,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:19,352 INFO L276 IsEmpty]: Start isEmpty. Operand 2785 states and 13098 transitions. [2021-07-13 20:31:19,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:31:19,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:19,358 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:19,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable951 [2021-07-13 20:31:19,559 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:19,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:19,559 INFO L82 PathProgramCache]: Analyzing trace with hash 325168051, now seen corresponding path program 213 times [2021-07-13 20:31:19,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:19,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358989989] [2021-07-13 20:31:19,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:19,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:19,925 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:19,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:19,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358989989] [2021-07-13 20:31:19,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358989989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:19,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438071168] [2021-07-13 20:31:19,925 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:19,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:31:19,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:19,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:31:19,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:20,761 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:20,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438071168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:20,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:20,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-13 20:31:20,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955574220] [2021-07-13 20:31:20,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:31:20,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:20,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:31:20,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:31:20,762 INFO L87 Difference]: Start difference. First operand 2785 states and 13098 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:21,413 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-07-13 20:31:22,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:22,494 INFO L93 Difference]: Finished difference Result 3385 states and 15139 transitions. [2021-07-13 20:31:22,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:31:22,494 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:31:22,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:22,502 INFO L225 Difference]: With dead ends: 3385 [2021-07-13 20:31:22,502 INFO L226 Difference]: Without dead ends: 3306 [2021-07-13 20:31:22,503 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 2279.4ms TimeCoverageRelationStatistics Valid=392, Invalid=2578, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:31:22,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3306 states. [2021-07-13 20:31:22,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3306 to 2865. [2021-07-13 20:31:22,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2865 states, 2864 states have (on average 4.692039106145251) internal successors, (13438), 2864 states have internal predecessors, (13438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:22,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 13438 transitions. [2021-07-13 20:31:22,554 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 13438 transitions. Word has length 30 [2021-07-13 20:31:22,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:22,554 INFO L482 AbstractCegarLoop]: Abstraction has 2865 states and 13438 transitions. [2021-07-13 20:31:22,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:22,554 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 13438 transitions. [2021-07-13 20:31:22,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:31:22,558 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:22,558 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:22,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable958 [2021-07-13 20:31:22,761 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:22,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:22,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1822744915, now seen corresponding path program 214 times [2021-07-13 20:31:22,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:22,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811547458] [2021-07-13 20:31:22,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:22,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:23,082 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:23,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:23,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811547458] [2021-07-13 20:31:23,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811547458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:23,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210356847] [2021-07-13 20:31:23,083 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:23,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:31:23,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:23,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 20:31:23,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:23,579 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 [2021-07-13 20:31:23,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:23,583 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 [2021-07-13 20:31:23,584 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:23,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:23,623 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 [2021-07-13 20:31:23,624 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:23,627 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 [2021-07-13 20:31:23,628 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:23,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:23,667 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. [2021-07-13 20:31:23,667 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:119, output treesize:91 [2021-07-13 20:31:23,779 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:31:23,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210356847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:23,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:23,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-07-13 20:31:23,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233228758] [2021-07-13 20:31:23,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:31:23,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:23,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:31:23,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:31:23,780 INFO L87 Difference]: Start difference. First operand 2865 states and 13438 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:28,787 WARN L205 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-07-13 20:31:28,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:28,984 INFO L93 Difference]: Finished difference Result 3569 states and 15801 transitions. [2021-07-13 20:31:28,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:31:28,984 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:31:28,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:28,993 INFO L225 Difference]: With dead ends: 3569 [2021-07-13 20:31:28,993 INFO L226 Difference]: Without dead ends: 3527 [2021-07-13 20:31:28,993 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 5497.9ms TimeCoverageRelationStatistics Valid=238, Invalid=1484, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:31:28,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3527 states. [2021-07-13 20:31:29,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3527 to 2982. [2021-07-13 20:31:29,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 4.682321368668232) internal successors, (13958), 2981 states have internal predecessors, (13958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:29,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 13958 transitions. [2021-07-13 20:31:29,043 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 13958 transitions. Word has length 30 [2021-07-13 20:31:29,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:29,043 INFO L482 AbstractCegarLoop]: Abstraction has 2982 states and 13958 transitions. [2021-07-13 20:31:29,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:29,043 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 13958 transitions. [2021-07-13 20:31:29,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:31:29,047 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:29,047 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:29,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable961,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:29,248 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:29,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:29,248 INFO L82 PathProgramCache]: Analyzing trace with hash 844238639, now seen corresponding path program 215 times [2021-07-13 20:31:29,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:29,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936693753] [2021-07-13 20:31:29,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:29,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:29,559 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:29,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:29,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936693753] [2021-07-13 20:31:29,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936693753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:29,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919070106] [2021-07-13 20:31:29,559 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 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:29,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:31:29,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:29,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:31:29,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:30,246 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:30,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919070106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:30,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:30,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-13 20:31:30,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153905406] [2021-07-13 20:31:30,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:31:30,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:30,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:31:30,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=967, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:31:30,247 INFO L87 Difference]: Start difference. First operand 2982 states and 13958 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:30,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:30,699 INFO L93 Difference]: Finished difference Result 3047 states and 14149 transitions. [2021-07-13 20:31:30,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:31:30,699 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:31:30,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:30,706 INFO L225 Difference]: With dead ends: 3047 [2021-07-13 20:31:30,706 INFO L226 Difference]: Without dead ends: 3042 [2021-07-13 20:31:30,706 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1043.6ms TimeCoverageRelationStatistics Valid=120, Invalid=1286, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:31:30,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3042 states. [2021-07-13 20:31:30,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3042 to 2976. [2021-07-13 20:31:30,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2976 states, 2975 states have (on average 4.68436974789916) internal successors, (13936), 2975 states have internal predecessors, (13936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:30,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2976 states to 2976 states and 13936 transitions. [2021-07-13 20:31:30,749 INFO L78 Accepts]: Start accepts. Automaton has 2976 states and 13936 transitions. Word has length 30 [2021-07-13 20:31:30,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:30,749 INFO L482 AbstractCegarLoop]: Abstraction has 2976 states and 13936 transitions. [2021-07-13 20:31:30,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:30,749 INFO L276 IsEmpty]: Start isEmpty. Operand 2976 states and 13936 transitions. [2021-07-13 20:31:30,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:31:30,753 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:30,753 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:30,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable965 [2021-07-13 20:31:30,954 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:30,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:30,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1600927089, now seen corresponding path program 216 times [2021-07-13 20:31:30,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:30,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922146893] [2021-07-13 20:31:30,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:30,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:31,215 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:31,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:31,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922146893] [2021-07-13 20:31:31,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922146893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:31,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339697656] [2021-07-13 20:31:31,215 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:31,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:31:31,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:31,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:31:31,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:31,836 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 [2021-07-13 20:31:31,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:31,840 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 [2021-07-13 20:31:31,841 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:31,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:31,891 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 [2021-07-13 20:31:31,893 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:31,896 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 [2021-07-13 20:31:31,897 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:31,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:31,944 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. [2021-07-13 20:31:31,944 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:147, output treesize:119 [2021-07-13 20:31:32,094 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:31:32,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339697656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:32,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:32,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-07-13 20:31:32,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126617108] [2021-07-13 20:31:32,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:31:32,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:32,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:31:32,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:31:32,095 INFO L87 Difference]: Start difference. First operand 2976 states and 13936 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:32,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:32,981 INFO L93 Difference]: Finished difference Result 3127 states and 14283 transitions. [2021-07-13 20:31:32,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:31:32,982 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:31:32,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:32,990 INFO L225 Difference]: With dead ends: 3127 [2021-07-13 20:31:32,990 INFO L226 Difference]: Without dead ends: 3111 [2021-07-13 20:31:32,991 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 1396.7ms TimeCoverageRelationStatistics Valid=172, Invalid=1468, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:31:32,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2021-07-13 20:31:33,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 2977. [2021-07-13 20:31:33,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2977 states, 2976 states have (on average 4.6875) internal successors, (13950), 2976 states have internal predecessors, (13950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:33,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2977 states to 2977 states and 13950 transitions. [2021-07-13 20:31:33,036 INFO L78 Accepts]: Start accepts. Automaton has 2977 states and 13950 transitions. Word has length 30 [2021-07-13 20:31:33,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:33,036 INFO L482 AbstractCegarLoop]: Abstraction has 2977 states and 13950 transitions. [2021-07-13 20:31:33,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:33,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2977 states and 13950 transitions. [2021-07-13 20:31:33,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:31:33,040 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:33,040 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:33,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable966,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:33,241 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:33,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:33,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1654264789, now seen corresponding path program 217 times [2021-07-13 20:31:33,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:33,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658457231] [2021-07-13 20:31:33,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:33,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:33,627 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:33,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:33,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658457231] [2021-07-13 20:31:33,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658457231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:33,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399539644] [2021-07-13 20:31:33,627 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:33,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:33,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:31:33,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:34,482 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:34,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399539644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:34,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:34,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-13 20:31:34,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176708836] [2021-07-13 20:31:34,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:31:34,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:34,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:31:34,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:31:34,483 INFO L87 Difference]: Start difference. First operand 2977 states and 13950 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:36,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:36,014 INFO L93 Difference]: Finished difference Result 3332 states and 15161 transitions. [2021-07-13 20:31:36,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:31:36,014 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:31:36,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:36,022 INFO L225 Difference]: With dead ends: 3332 [2021-07-13 20:31:36,022 INFO L226 Difference]: Without dead ends: 3309 [2021-07-13 20:31:36,022 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 2149.3ms TimeCoverageRelationStatistics Valid=308, Invalid=2448, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:31:36,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3309 states. [2021-07-13 20:31:36,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3309 to 3028. [2021-07-13 20:31:36,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3028 states, 3027 states have (on average 4.686157912124215) internal successors, (14185), 3027 states have internal predecessors, (14185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:36,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3028 states to 3028 states and 14185 transitions. [2021-07-13 20:31:36,077 INFO L78 Accepts]: Start accepts. Automaton has 3028 states and 14185 transitions. Word has length 30 [2021-07-13 20:31:36,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:36,077 INFO L482 AbstractCegarLoop]: Abstraction has 3028 states and 14185 transitions. [2021-07-13 20:31:36,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:36,078 INFO L276 IsEmpty]: Start isEmpty. Operand 3028 states and 14185 transitions. [2021-07-13 20:31:36,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:31:36,082 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:36,082 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:36,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable972 [2021-07-13 20:31:36,285 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:36,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:36,285 INFO L82 PathProgramCache]: Analyzing trace with hash -161450573, now seen corresponding path program 218 times [2021-07-13 20:31:36,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:36,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106837302] [2021-07-13 20:31:36,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:36,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:36,498 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:31:36,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:36,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106837302] [2021-07-13 20:31:36,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106837302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:36,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111371157] [2021-07-13 20:31:36,498 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:36,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:31:36,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:36,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:31:36,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:37,158 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2021-07-13 20:31:37,354 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 [2021-07-13 20:31:37,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:37,358 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 [2021-07-13 20:31:37,359 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:37,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:37,413 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 [2021-07-13 20:31:37,414 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:37,418 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 [2021-07-13 20:31:37,419 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:37,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:37,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2021-07-13 20:31:37,470 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:143, output treesize:115 [2021-07-13 20:31:37,640 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:31:37,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111371157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:37,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:37,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2021-07-13 20:31:37,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254487646] [2021-07-13 20:31:37,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:31:37,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:37,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:31:37,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:31:37,641 INFO L87 Difference]: Start difference. First operand 3028 states and 14185 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:38,400 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2021-07-13 20:31:38,831 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2021-07-13 20:31:39,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:39,257 INFO L93 Difference]: Finished difference Result 3185 states and 14482 transitions. [2021-07-13 20:31:39,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:31:39,258 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:31:39,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:39,264 INFO L225 Difference]: With dead ends: 3185 [2021-07-13 20:31:39,264 INFO L226 Difference]: Without dead ends: 3175 [2021-07-13 20:31:39,265 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1975.9ms TimeCoverageRelationStatistics Valid=291, Invalid=1779, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:31:39,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3175 states. [2021-07-13 20:31:39,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3175 to 3020. [2021-07-13 20:31:39,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3020 states, 3019 states have (on average 4.68532626697582) internal successors, (14145), 3019 states have internal predecessors, (14145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:39,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3020 states to 3020 states and 14145 transitions. [2021-07-13 20:31:39,309 INFO L78 Accepts]: Start accepts. Automaton has 3020 states and 14145 transitions. Word has length 30 [2021-07-13 20:31:39,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:39,309 INFO L482 AbstractCegarLoop]: Abstraction has 3020 states and 14145 transitions. [2021-07-13 20:31:39,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:39,309 INFO L276 IsEmpty]: Start isEmpty. Operand 3020 states and 14145 transitions. [2021-07-13 20:31:39,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:31:39,313 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:39,313 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:39,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable975 [2021-07-13 20:31:39,514 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:39,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:39,514 INFO L82 PathProgramCache]: Analyzing trace with hash 2045182677, now seen corresponding path program 219 times [2021-07-13 20:31:39,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:39,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729103003] [2021-07-13 20:31:39,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:39,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:39,939 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:39,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:39,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729103003] [2021-07-13 20:31:39,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729103003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:39,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649328203] [2021-07-13 20:31:39,939 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 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:39,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 20:31:39,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:39,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:31:39,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:40,777 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:40,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649328203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:40,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:40,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-13 20:31:40,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864936225] [2021-07-13 20:31:40,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:31:40,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:40,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:31:40,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:31:40,778 INFO L87 Difference]: Start difference. First operand 3020 states and 14145 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:41,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:41,576 INFO L93 Difference]: Finished difference Result 3462 states and 15765 transitions. [2021-07-13 20:31:41,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:31:41,577 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:31:41,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:41,584 INFO L225 Difference]: With dead ends: 3462 [2021-07-13 20:31:41,585 INFO L226 Difference]: Without dead ends: 3426 [2021-07-13 20:31:41,585 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1457.9ms TimeCoverageRelationStatistics Valid=206, Invalid=1600, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:31:41,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3426 states. [2021-07-13 20:31:41,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3426 to 3090. [2021-07-13 20:31:41,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3090 states, 3089 states have (on average 4.68824862415021) internal successors, (14482), 3089 states have internal predecessors, (14482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:41,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3090 states to 3090 states and 14482 transitions. [2021-07-13 20:31:41,636 INFO L78 Accepts]: Start accepts. Automaton has 3090 states and 14482 transitions. Word has length 30 [2021-07-13 20:31:41,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:41,636 INFO L482 AbstractCegarLoop]: Abstraction has 3090 states and 14482 transitions. [2021-07-13 20:31:41,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:41,636 INFO L276 IsEmpty]: Start isEmpty. Operand 3090 states and 14482 transitions. [2021-07-13 20:31:41,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:31:41,640 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:41,641 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:41,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable981 [2021-07-13 20:31:41,841 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:41,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:41,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1574669730, now seen corresponding path program 220 times [2021-07-13 20:31:41,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:41,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807347161] [2021-07-13 20:31:41,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:41,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:42,205 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-07-13 20:31:42,467 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:42,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:42,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807347161] [2021-07-13 20:31:42,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807347161] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:42,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120676900] [2021-07-13 20:31:42,468 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 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:42,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:31:42,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:42,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:31:42,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:43,108 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 [2021-07-13 20:31:43,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:43,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:43,147 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 [2021-07-13 20:31:43,148 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:43,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:43,185 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 [2021-07-13 20:31:43,185 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:43,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:43,220 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 [2021-07-13 20:31:43,221 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:43,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:43,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-13 20:31:43,256 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:127, output treesize:99 [2021-07-13 20:31:43,390 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:31:43,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120676900] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:43,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:43,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 29 [2021-07-13 20:31:43,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112881004] [2021-07-13 20:31:43,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:31:43,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:43,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:31:43,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=790, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:31:43,391 INFO L87 Difference]: Start difference. First operand 3090 states and 14482 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:44,646 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-07-13 20:31:48,783 WARN L205 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-07-13 20:31:52,919 WARN L205 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2021-07-13 20:31:53,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:53,203 INFO L93 Difference]: Finished difference Result 4299 states and 19280 transitions. [2021-07-13 20:31:53,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:31:53,203 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 20:31:53,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:53,214 INFO L225 Difference]: With dead ends: 4299 [2021-07-13 20:31:53,214 INFO L226 Difference]: Without dead ends: 4284 [2021-07-13 20:31:53,214 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 10341.1ms TimeCoverageRelationStatistics Valid=199, Invalid=2251, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:31:53,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4284 states. [2021-07-13 20:31:53,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4284 to 3385. [2021-07-13 20:31:53,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3385 states, 3384 states have (on average 4.755910165484633) internal successors, (16094), 3384 states have internal predecessors, (16094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:53,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3385 states to 3385 states and 16094 transitions. [2021-07-13 20:31:53,277 INFO L78 Accepts]: Start accepts. Automaton has 3385 states and 16094 transitions. Word has length 31 [2021-07-13 20:31:53,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:53,278 INFO L482 AbstractCegarLoop]: Abstraction has 3385 states and 16094 transitions. [2021-07-13 20:31:53,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:53,278 INFO L276 IsEmpty]: Start isEmpty. Operand 3385 states and 16094 transitions. [2021-07-13 20:31:53,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:31:53,283 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:53,283 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:53,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable984,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:53,483 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:53,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:53,483 INFO L82 PathProgramCache]: Analyzing trace with hash -501858524, now seen corresponding path program 221 times [2021-07-13 20:31:53,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:53,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000723442] [2021-07-13 20:31:53,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:53,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:53,841 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:53,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:53,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000723442] [2021-07-13 20:31:53,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000723442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:53,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161067911] [2021-07-13 20:31:53,841 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 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:53,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 20:31:53,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:53,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:31:53,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:54,780 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:54,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161067911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:54,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:54,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:31:54,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407514643] [2021-07-13 20:31:54,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:31:54,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:54,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:31:54,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:31:54,781 INFO L87 Difference]: Start difference. First operand 3385 states and 16094 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:55,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:55,895 INFO L93 Difference]: Finished difference Result 3784 states and 17341 transitions. [2021-07-13 20:31:55,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:31:55,895 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 20:31:55,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:55,904 INFO L225 Difference]: With dead ends: 3784 [2021-07-13 20:31:55,904 INFO L226 Difference]: Without dead ends: 3754 [2021-07-13 20:31:55,904 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1790.8ms TimeCoverageRelationStatistics Valid=317, Invalid=2035, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:31:55,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3754 states. [2021-07-13 20:31:55,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3754 to 3427. [2021-07-13 20:31:55,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3427 states, 3426 states have (on average 4.752189141856392) internal successors, (16281), 3426 states have internal predecessors, (16281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:55,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3427 states to 3427 states and 16281 transitions. [2021-07-13 20:31:55,962 INFO L78 Accepts]: Start accepts. Automaton has 3427 states and 16281 transitions. Word has length 31 [2021-07-13 20:31:55,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:55,962 INFO L482 AbstractCegarLoop]: Abstraction has 3427 states and 16281 transitions. [2021-07-13 20:31:55,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:55,962 INFO L276 IsEmpty]: Start isEmpty. Operand 3427 states and 16281 transitions. [2021-07-13 20:31:55,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:31:55,967 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:55,967 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:56,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable991 [2021-07-13 20:31:56,168 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:56,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:56,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1313452132, now seen corresponding path program 222 times [2021-07-13 20:31:56,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:56,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156656458] [2021-07-13 20:31:56,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:56,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:56,546 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:56,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:56,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156656458] [2021-07-13 20:31:56,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156656458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:56,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105789002] [2021-07-13 20:31:56,546 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 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:56,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 20:31:56,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:56,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:31:56,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:57,462 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:57,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105789002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:57,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:57,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:31:57,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700608703] [2021-07-13 20:31:57,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:31:57,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:57,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:31:57,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1070, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:31:57,463 INFO L87 Difference]: Start difference. First operand 3427 states and 16281 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:58,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:58,523 INFO L93 Difference]: Finished difference Result 3523 states and 16535 transitions. [2021-07-13 20:31:58,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:31:58,523 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 20:31:58,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:58,531 INFO L225 Difference]: With dead ends: 3523 [2021-07-13 20:31:58,532 INFO L226 Difference]: Without dead ends: 3514 [2021-07-13 20:31:58,532 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1820.1ms TimeCoverageRelationStatistics Valid=250, Invalid=2102, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:31:58,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3514 states. [2021-07-13 20:31:58,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3514 to 3416. [2021-07-13 20:31:58,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3416 states, 3415 states have (on average 4.759590043923866) internal successors, (16254), 3415 states have internal predecessors, (16254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:58,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3416 states to 3416 states and 16254 transitions. [2021-07-13 20:31:58,586 INFO L78 Accepts]: Start accepts. Automaton has 3416 states and 16254 transitions. Word has length 31 [2021-07-13 20:31:58,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:58,586 INFO L482 AbstractCegarLoop]: Abstraction has 3416 states and 16254 transitions. [2021-07-13 20:31:58,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:58,586 INFO L276 IsEmpty]: Start isEmpty. Operand 3416 states and 16254 transitions. [2021-07-13 20:31:58,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:31:58,591 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:58,591 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:58,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable994,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:58,792 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:58,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:58,792 INFO L82 PathProgramCache]: Analyzing trace with hash -977706982, now seen corresponding path program 223 times [2021-07-13 20:31:58,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:58,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843169974] [2021-07-13 20:31:58,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:58,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:59,115 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:59,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:59,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843169974] [2021-07-13 20:31:59,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843169974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:59,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455137863] [2021-07-13 20:31:59,116 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 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:59,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:59,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:31:59,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:59,801 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 [2021-07-13 20:31:59,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:59,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:59,857 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 [2021-07-13 20:31:59,858 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:59,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:59,907 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 [2021-07-13 20:31:59,908 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:59,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:59,955 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 [2021-07-13 20:31:59,956 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:59,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:00,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-13 20:32:00,004 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:157, output treesize:129 [2021-07-13 20:32:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:32:00,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455137863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:00,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:00,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-13 20:32:00,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674444018] [2021-07-13 20:32:00,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:32:00,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:00,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:32:00,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:32:00,198 INFO L87 Difference]: Start difference. First operand 3416 states and 16254 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:01,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:01,336 INFO L93 Difference]: Finished difference Result 4312 states and 19940 transitions. [2021-07-13 20:32:01,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:32:01,336 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 20:32:01,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:01,346 INFO L225 Difference]: With dead ends: 4312 [2021-07-13 20:32:01,346 INFO L226 Difference]: Without dead ends: 4297 [2021-07-13 20:32:01,347 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1630.6ms TimeCoverageRelationStatistics Valid=323, Invalid=1839, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:32:01,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4297 states. [2021-07-13 20:32:01,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4297 to 3442. [2021-07-13 20:32:01,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3442 states, 3441 states have (on average 4.745422842197036) internal successors, (16329), 3441 states have internal predecessors, (16329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:01,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3442 states to 3442 states and 16329 transitions. [2021-07-13 20:32:01,426 INFO L78 Accepts]: Start accepts. Automaton has 3442 states and 16329 transitions. Word has length 31 [2021-07-13 20:32:01,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:01,426 INFO L482 AbstractCegarLoop]: Abstraction has 3442 states and 16329 transitions. [2021-07-13 20:32:01,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:01,426 INFO L276 IsEmpty]: Start isEmpty. Operand 3442 states and 16329 transitions. [2021-07-13 20:32:01,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:32:01,432 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:01,432 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:01,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable997 [2021-07-13 20:32:01,633 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:01,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:01,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1892834208, now seen corresponding path program 224 times [2021-07-13 20:32:01,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:01,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037945333] [2021-07-13 20:32:01,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:01,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:02,012 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:02,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:02,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037945333] [2021-07-13 20:32:02,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037945333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:02,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159951262] [2021-07-13 20:32:02,012 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 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:02,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:32:02,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:32:02,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:32:02,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:02,757 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:02,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159951262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:02,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:02,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:32:02,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628045943] [2021-07-13 20:32:02,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:32:02,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:02,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:32:02,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:32:02,758 INFO L87 Difference]: Start difference. First operand 3442 states and 16329 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:03,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:03,282 INFO L93 Difference]: Finished difference Result 3497 states and 16477 transitions. [2021-07-13 20:32:03,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:32:03,282 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 20:32:03,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:03,290 INFO L225 Difference]: With dead ends: 3497 [2021-07-13 20:32:03,290 INFO L226 Difference]: Without dead ends: 3488 [2021-07-13 20:32:03,290 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1175.6ms TimeCoverageRelationStatistics Valid=155, Invalid=1485, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:32:03,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3488 states. [2021-07-13 20:32:03,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3488 to 3445. [2021-07-13 20:32:03,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3445 states, 3444 states have (on average 4.745354239256678) internal successors, (16343), 3444 states have internal predecessors, (16343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:03,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3445 states to 3445 states and 16343 transitions. [2021-07-13 20:32:03,343 INFO L78 Accepts]: Start accepts. Automaton has 3445 states and 16343 transitions. Word has length 31 [2021-07-13 20:32:03,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:03,343 INFO L482 AbstractCegarLoop]: Abstraction has 3445 states and 16343 transitions. [2021-07-13 20:32:03,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:03,343 INFO L276 IsEmpty]: Start isEmpty. Operand 3445 states and 16343 transitions. [2021-07-13 20:32:03,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:32:03,348 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:03,348 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:03,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1014 [2021-07-13 20:32:03,549 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:03,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:03,549 INFO L82 PathProgramCache]: Analyzing trace with hash 262643294, now seen corresponding path program 225 times [2021-07-13 20:32:03,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:03,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408783722] [2021-07-13 20:32:03,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:03,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:03,908 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 5 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:03,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:03,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408783722] [2021-07-13 20:32:03,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408783722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:03,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656775318] [2021-07-13 20:32:03,909 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 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:03,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:32:03,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:32:03,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:32:03,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:04,551 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 [2021-07-13 20:32:04,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:04,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:04,592 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 [2021-07-13 20:32:04,593 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:04,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:04,632 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 [2021-07-13 20:32:04,633 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:04,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:04,669 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 [2021-07-13 20:32:04,677 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:04,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:04,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-13 20:32:04,713 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:127, output treesize:99 [2021-07-13 20:32:04,867 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:32:04,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656775318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:04,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:04,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 29 [2021-07-13 20:32:04,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10528150] [2021-07-13 20:32:04,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:32:04,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:04,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:32:04,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:32:04,867 INFO L87 Difference]: Start difference. First operand 3445 states and 16343 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:06,314 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-07-13 20:32:10,505 WARN L205 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-07-13 20:32:14,637 WARN L205 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-07-13 20:32:14,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:14,897 INFO L93 Difference]: Finished difference Result 6226 states and 27707 transitions. [2021-07-13 20:32:14,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:32:14,898 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 20:32:14,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:14,912 INFO L225 Difference]: With dead ends: 6226 [2021-07-13 20:32:14,912 INFO L226 Difference]: Without dead ends: 6145 [2021-07-13 20:32:14,912 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 10323.4ms TimeCoverageRelationStatistics Valid=275, Invalid=2481, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:32:14,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6145 states. [2021-07-13 20:32:14,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6145 to 3919. [2021-07-13 20:32:14,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3919 states, 3918 states have (on average 4.840735068912711) internal successors, (18966), 3918 states have internal predecessors, (18966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:14,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3919 states to 3919 states and 18966 transitions. [2021-07-13 20:32:14,992 INFO L78 Accepts]: Start accepts. Automaton has 3919 states and 18966 transitions. Word has length 31 [2021-07-13 20:32:14,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:14,992 INFO L482 AbstractCegarLoop]: Abstraction has 3919 states and 18966 transitions. [2021-07-13 20:32:14,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:14,992 INFO L276 IsEmpty]: Start isEmpty. Operand 3919 states and 18966 transitions. [2021-07-13 20:32:14,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:32:14,998 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:14,999 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:15,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1015 [2021-07-13 20:32:15,199 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:15,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:15,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1233841082, now seen corresponding path program 226 times [2021-07-13 20:32:15,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:15,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668083620] [2021-07-13 20:32:15,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:15,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:15,578 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:15,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:15,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668083620] [2021-07-13 20:32:15,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668083620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:15,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324251127] [2021-07-13 20:32:15,578 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 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:15,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:32:15,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:32:15,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:32:15,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:16,518 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:16,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324251127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:16,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:16,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:32:16,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508650078] [2021-07-13 20:32:16,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:32:16,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:16,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:32:16,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:32:16,519 INFO L87 Difference]: Start difference. First operand 3919 states and 18966 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:17,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:17,165 INFO L93 Difference]: Finished difference Result 3997 states and 19173 transitions. [2021-07-13 20:32:17,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:32:17,165 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 20:32:17,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:17,174 INFO L225 Difference]: With dead ends: 3997 [2021-07-13 20:32:17,175 INFO L226 Difference]: Without dead ends: 3984 [2021-07-13 20:32:17,175 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1401.2ms TimeCoverageRelationStatistics Valid=157, Invalid=1649, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:32:17,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3984 states. [2021-07-13 20:32:17,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3984 to 3919. [2021-07-13 20:32:17,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3919 states, 3918 states have (on average 4.840735068912711) internal successors, (18966), 3918 states have internal predecessors, (18966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:17,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3919 states to 3919 states and 18966 transitions. [2021-07-13 20:32:17,240 INFO L78 Accepts]: Start accepts. Automaton has 3919 states and 18966 transitions. Word has length 31 [2021-07-13 20:32:17,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:17,240 INFO L482 AbstractCegarLoop]: Abstraction has 3919 states and 18966 transitions. [2021-07-13 20:32:17,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:17,241 INFO L276 IsEmpty]: Start isEmpty. Operand 3919 states and 18966 transitions. [2021-07-13 20:32:17,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:32:17,246 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:17,246 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:17,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1022 [2021-07-13 20:32:17,447 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:17,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:17,447 INFO L82 PathProgramCache]: Analyzing trace with hash 110356286, now seen corresponding path program 227 times [2021-07-13 20:32:17,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:17,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682285811] [2021-07-13 20:32:17,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:17,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:17,728 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:32:17,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:17,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682285811] [2021-07-13 20:32:17,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682285811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:17,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106683355] [2021-07-13 20:32:17,729 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 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:17,774 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:32:17,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:32:17,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:32:17,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:18,295 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-07-13 20:32:18,618 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_208, client], 1=[node_1]} [2021-07-13 20:32:18,622 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 [2021-07-13 20:32:18,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:18,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:18,680 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 [2021-07-13 20:32:18,681 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:18,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:18,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:18,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 20:32:18,738 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:18,744 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:32:18,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 20:32:18,745 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:18,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:18,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2021-07-13 20:32:18,794 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:163, output treesize:125 [2021-07-13 20:32:21,202 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 70 [2021-07-13 20:32:21,296 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:32:21,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106683355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:21,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:21,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2021-07-13 20:32:21,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252714631] [2021-07-13 20:32:21,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:32:21,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:21,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:32:21,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:32:21,297 INFO L87 Difference]: Start difference. First operand 3919 states and 18966 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:21,777 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2021-07-13 20:32:24,008 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-07-13 20:32:26,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:26,330 INFO L93 Difference]: Finished difference Result 4125 states and 19314 transitions. [2021-07-13 20:32:26,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:32:26,331 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 20:32:26,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:26,342 INFO L225 Difference]: With dead ends: 4125 [2021-07-13 20:32:26,343 INFO L226 Difference]: Without dead ends: 4089 [2021-07-13 20:32:26,343 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 5871.9ms TimeCoverageRelationStatistics Valid=156, Invalid=1403, Unknown=1, NotChecked=0, Total=1560 [2021-07-13 20:32:26,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4089 states. [2021-07-13 20:32:26,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4089 to 3833. [2021-07-13 20:32:26,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3832 states have (on average 4.840814196242171) internal successors, (18550), 3832 states have internal predecessors, (18550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:26,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 18550 transitions. [2021-07-13 20:32:26,422 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 18550 transitions. Word has length 31 [2021-07-13 20:32:26,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:26,422 INFO L482 AbstractCegarLoop]: Abstraction has 3833 states and 18550 transitions. [2021-07-13 20:32:26,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:26,422 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 18550 transitions. [2021-07-13 20:32:26,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:32:26,428 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:26,428 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:26,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1025 [2021-07-13 20:32:26,629 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:26,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:26,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1439139550, now seen corresponding path program 228 times [2021-07-13 20:32:26,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:26,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759011140] [2021-07-13 20:32:26,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:26,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:26,765 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 20:32:26,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:26,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759011140] [2021-07-13 20:32:26,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759011140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:26,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56327217] [2021-07-13 20:32:26,765 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 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:26,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 20:32:26,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:32:26,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:32:26,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:27,511 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 [2021-07-13 20:32:27,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:27,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:27,531 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 [2021-07-13 20:32:27,532 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:27,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:27,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:32:27,547 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:64, output treesize:50 [2021-07-13 20:32:27,595 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:27,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56327217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:27,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:27,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18] total 27 [2021-07-13 20:32:27,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833853090] [2021-07-13 20:32:27,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:32:27,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:27,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:32:27,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:32:27,596 INFO L87 Difference]: Start difference. First operand 3833 states and 18550 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:28,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:28,126 INFO L93 Difference]: Finished difference Result 6856 states and 32904 transitions. [2021-07-13 20:32:28,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:32:28,126 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 20:32:28,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:28,144 INFO L225 Difference]: With dead ends: 6856 [2021-07-13 20:32:28,144 INFO L226 Difference]: Without dead ends: 6795 [2021-07-13 20:32:28,145 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 957.7ms TimeCoverageRelationStatistics Valid=227, Invalid=1033, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:32:28,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6795 states. [2021-07-13 20:32:28,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6795 to 4695. [2021-07-13 20:32:28,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4695 states, 4694 states have (on average 5.002556455048999) internal successors, (23482), 4694 states have internal predecessors, (23482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:28,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4695 states to 4695 states and 23482 transitions. [2021-07-13 20:32:28,242 INFO L78 Accepts]: Start accepts. Automaton has 4695 states and 23482 transitions. Word has length 31 [2021-07-13 20:32:28,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:28,242 INFO L482 AbstractCegarLoop]: Abstraction has 4695 states and 23482 transitions. [2021-07-13 20:32:28,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:28,242 INFO L276 IsEmpty]: Start isEmpty. Operand 4695 states and 23482 transitions. [2021-07-13 20:32:28,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:32:28,249 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:28,249 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:28,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1032,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:28,450 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:28,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:28,450 INFO L82 PathProgramCache]: Analyzing trace with hash 772594686, now seen corresponding path program 229 times [2021-07-13 20:32:28,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:28,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427307423] [2021-07-13 20:32:28,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:28,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:28,782 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:28,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:28,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427307423] [2021-07-13 20:32:28,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427307423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:28,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015444548] [2021-07-13 20:32:28,782 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 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:28,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:28,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:32:28,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:29,778 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:29,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015444548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:29,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:29,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:32:29,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100089159] [2021-07-13 20:32:29,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:32:29,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:29,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:32:29,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:32:29,779 INFO L87 Difference]: Start difference. First operand 4695 states and 23482 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:30,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:30,379 INFO L93 Difference]: Finished difference Result 4746 states and 23612 transitions. [2021-07-13 20:32:30,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:32:30,379 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 20:32:30,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:30,391 INFO L225 Difference]: With dead ends: 4746 [2021-07-13 20:32:30,391 INFO L226 Difference]: Without dead ends: 4733 [2021-07-13 20:32:30,391 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 1414.2ms TimeCoverageRelationStatistics Valid=147, Invalid=1575, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:32:30,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4733 states. [2021-07-13 20:32:30,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4733 to 4681. [2021-07-13 20:32:30,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4681 states, 4680 states have (on average 5.013034188034188) internal successors, (23461), 4680 states have internal predecessors, (23461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:30,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4681 states to 4681 states and 23461 transitions. [2021-07-13 20:32:30,471 INFO L78 Accepts]: Start accepts. Automaton has 4681 states and 23461 transitions. Word has length 31 [2021-07-13 20:32:30,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:30,471 INFO L482 AbstractCegarLoop]: Abstraction has 4681 states and 23461 transitions. [2021-07-13 20:32:30,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:30,471 INFO L276 IsEmpty]: Start isEmpty. Operand 4681 states and 23461 transitions. [2021-07-13 20:32:30,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:32:30,479 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:30,479 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:30,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1035 [2021-07-13 20:32:30,679 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:30,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:30,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1688987100, now seen corresponding path program 230 times [2021-07-13 20:32:30,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:30,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557640682] [2021-07-13 20:32:30,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:30,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:31,060 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:31,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:31,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557640682] [2021-07-13 20:32:31,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557640682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:31,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475930598] [2021-07-13 20:32:31,060 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 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:31,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:32:31,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:32:31,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:32:31,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:31,511 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-07-13 20:32:31,993 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:31,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475930598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:31,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:31,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:32:31,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634553033] [2021-07-13 20:32:31,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:32:31,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:31,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:32:31,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1075, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:32:31,994 INFO L87 Difference]: Start difference. First operand 4681 states and 23461 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:32,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:32,785 INFO L93 Difference]: Finished difference Result 4755 states and 23651 transitions. [2021-07-13 20:32:32,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:32:32,785 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 20:32:32,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:32,797 INFO L225 Difference]: With dead ends: 4755 [2021-07-13 20:32:32,797 INFO L226 Difference]: Without dead ends: 4742 [2021-07-13 20:32:32,798 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1586.7ms TimeCoverageRelationStatistics Valid=192, Invalid=1788, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:32:32,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4742 states. [2021-07-13 20:32:32,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4742 to 4697. [2021-07-13 20:32:32,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4697 states, 4696 states have (on average 5.007027257240204) internal successors, (23513), 4696 states have internal predecessors, (23513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:32,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4697 states to 4697 states and 23513 transitions. [2021-07-13 20:32:32,880 INFO L78 Accepts]: Start accepts. Automaton has 4697 states and 23513 transitions. Word has length 31 [2021-07-13 20:32:32,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:32,880 INFO L482 AbstractCegarLoop]: Abstraction has 4697 states and 23513 transitions. [2021-07-13 20:32:32,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:32,880 INFO L276 IsEmpty]: Start isEmpty. Operand 4697 states and 23513 transitions. [2021-07-13 20:32:32,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:32:32,889 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:32,889 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:33,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1039,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:33,089 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:33,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:33,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1029993974, now seen corresponding path program 231 times [2021-07-13 20:32:33,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:33,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689674042] [2021-07-13 20:32:33,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:33,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:33,408 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:33,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:33,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689674042] [2021-07-13 20:32:33,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689674042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:33,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774086010] [2021-07-13 20:32:33,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:33,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 20:32:33,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:32:33,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:32:33,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:33,912 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-07-13 20:32:34,557 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:34,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774086010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:34,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:34,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:32:34,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864365845] [2021-07-13 20:32:34,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:32:34,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:34,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:32:34,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:32:34,558 INFO L87 Difference]: Start difference. First operand 4697 states and 23513 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:35,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:35,222 INFO L93 Difference]: Finished difference Result 5035 states and 24640 transitions. [2021-07-13 20:32:35,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:32:35,222 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 20:32:35,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:35,235 INFO L225 Difference]: With dead ends: 5035 [2021-07-13 20:32:35,235 INFO L226 Difference]: Without dead ends: 5011 [2021-07-13 20:32:35,235 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1539.1ms TimeCoverageRelationStatistics Valid=194, Invalid=1528, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:32:35,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5011 states. [2021-07-13 20:32:35,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5011 to 4691. [2021-07-13 20:32:35,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4691 states, 4690 states have (on average 5.010234541577825) internal successors, (23498), 4690 states have internal predecessors, (23498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:35,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4691 states to 4691 states and 23498 transitions. [2021-07-13 20:32:35,326 INFO L78 Accepts]: Start accepts. Automaton has 4691 states and 23498 transitions. Word has length 31 [2021-07-13 20:32:35,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:35,326 INFO L482 AbstractCegarLoop]: Abstraction has 4691 states and 23498 transitions. [2021-07-13 20:32:35,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:35,326 INFO L276 IsEmpty]: Start isEmpty. Operand 4691 states and 23498 transitions. [2021-07-13 20:32:35,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:32:35,334 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:35,334 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:35,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1042,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:35,535 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:35,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:35,535 INFO L82 PathProgramCache]: Analyzing trace with hash 632601598, now seen corresponding path program 232 times [2021-07-13 20:32:35,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:35,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958444594] [2021-07-13 20:32:35,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:35,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:35,922 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:35,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:35,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958444594] [2021-07-13 20:32:35,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958444594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:35,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224170225] [2021-07-13 20:32:35,922 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 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:35,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:32:35,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:32:35,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:32:35,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:36,986 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:36,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224170225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:36,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:36,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:32:36,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31824889] [2021-07-13 20:32:36,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:32:36,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:36,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:32:36,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1096, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:32:36,987 INFO L87 Difference]: Start difference. First operand 4691 states and 23498 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:37,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:37,593 INFO L93 Difference]: Finished difference Result 4753 states and 23660 transitions. [2021-07-13 20:32:37,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:32:37,593 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 20:32:37,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:37,605 INFO L225 Difference]: With dead ends: 4753 [2021-07-13 20:32:37,605 INFO L226 Difference]: Without dead ends: 4744 [2021-07-13 20:32:37,605 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1425.8ms TimeCoverageRelationStatistics Valid=123, Invalid=1437, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:32:37,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4744 states. [2021-07-13 20:32:37,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4744 to 4695. [2021-07-13 20:32:37,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4695 states, 4694 states have (on average 5.008308478909246) internal successors, (23509), 4694 states have internal predecessors, (23509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:37,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4695 states to 4695 states and 23509 transitions. [2021-07-13 20:32:37,687 INFO L78 Accepts]: Start accepts. Automaton has 4695 states and 23509 transitions. Word has length 31 [2021-07-13 20:32:37,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:37,687 INFO L482 AbstractCegarLoop]: Abstraction has 4695 states and 23509 transitions. [2021-07-13 20:32:37,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:37,687 INFO L276 IsEmpty]: Start isEmpty. Operand 4695 states and 23509 transitions. [2021-07-13 20:32:37,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:32:37,696 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:37,696 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:37,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1047,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:37,897 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:37,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:37,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1503896890, now seen corresponding path program 233 times [2021-07-13 20:32:37,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:37,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329276411] [2021-07-13 20:32:37,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:37,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:38,319 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:38,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:38,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329276411] [2021-07-13 20:32:38,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329276411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:38,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682258163] [2021-07-13 20:32:38,319 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 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:38,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 20:32:38,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:32:38,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:32:38,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:39,322 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:39,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682258163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:39,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:39,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:32:39,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573919385] [2021-07-13 20:32:39,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:32:39,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:39,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:32:39,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1086, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:32:39,323 INFO L87 Difference]: Start difference. First operand 4695 states and 23509 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:39,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:39,877 INFO L93 Difference]: Finished difference Result 4748 states and 23630 transitions. [2021-07-13 20:32:39,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:32:39,878 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 20:32:39,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:39,889 INFO L225 Difference]: With dead ends: 4748 [2021-07-13 20:32:39,890 INFO L226 Difference]: Without dead ends: 4739 [2021-07-13 20:32:39,890 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1402.4ms TimeCoverageRelationStatistics Valid=140, Invalid=1420, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:32:39,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4739 states. [2021-07-13 20:32:39,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4739 to 4684. [2021-07-13 20:32:39,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4684 states, 4683 states have (on average 5.014093529788597) internal successors, (23481), 4683 states have internal predecessors, (23481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:39,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4684 states to 4684 states and 23481 transitions. [2021-07-13 20:32:39,968 INFO L78 Accepts]: Start accepts. Automaton has 4684 states and 23481 transitions. Word has length 31 [2021-07-13 20:32:39,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:39,968 INFO L482 AbstractCegarLoop]: Abstraction has 4684 states and 23481 transitions. [2021-07-13 20:32:39,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:39,968 INFO L276 IsEmpty]: Start isEmpty. Operand 4684 states and 23481 transitions. [2021-07-13 20:32:39,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:32:39,975 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:39,975 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:40,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1052,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:40,176 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:40,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:40,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1809097854, now seen corresponding path program 234 times [2021-07-13 20:32:40,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:40,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138224441] [2021-07-13 20:32:40,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:40,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:40,486 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:40,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:40,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138224441] [2021-07-13 20:32:40,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138224441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:40,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422120320] [2021-07-13 20:32:40,487 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 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:40,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 20:32:40,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:32:40,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:32:40,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:41,616 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:41,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422120320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:41,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:41,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:32:41,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654008827] [2021-07-13 20:32:41,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:32:41,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:41,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:32:41,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1087, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:32:41,617 INFO L87 Difference]: Start difference. First operand 4684 states and 23481 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:42,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:42,260 INFO L93 Difference]: Finished difference Result 4790 states and 23786 transitions. [2021-07-13 20:32:42,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:32:42,260 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 20:32:42,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:42,272 INFO L225 Difference]: With dead ends: 4790 [2021-07-13 20:32:42,272 INFO L226 Difference]: Without dead ends: 4768 [2021-07-13 20:32:42,273 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1444.0ms TimeCoverageRelationStatistics Valid=153, Invalid=1569, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:32:42,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4768 states. [2021-07-13 20:32:42,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4768 to 4708. [2021-07-13 20:32:42,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4708 states, 4707 states have (on average 5.007435734013172) internal successors, (23570), 4707 states have internal predecessors, (23570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:42,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4708 states to 4708 states and 23570 transitions. [2021-07-13 20:32:42,373 INFO L78 Accepts]: Start accepts. Automaton has 4708 states and 23570 transitions. Word has length 31 [2021-07-13 20:32:42,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:42,373 INFO L482 AbstractCegarLoop]: Abstraction has 4708 states and 23570 transitions. [2021-07-13 20:32:42,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:42,373 INFO L276 IsEmpty]: Start isEmpty. Operand 4708 states and 23570 transitions. [2021-07-13 20:32:42,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:32:42,381 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:42,381 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:42,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1056 [2021-07-13 20:32:42,581 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:42,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:42,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1256388998, now seen corresponding path program 235 times [2021-07-13 20:32:42,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:42,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350909203] [2021-07-13 20:32:42,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:42,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:42,917 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:42,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:42,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350909203] [2021-07-13 20:32:42,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350909203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:42,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063818093] [2021-07-13 20:32:42,918 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 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:42,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:42,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:32:42,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:43,865 INFO L446 ElimStorePlain]: Different costs {0=[node_2, v_prenex_216], 1=[node_1]} [2021-07-13 20:32:43,870 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 [2021-07-13 20:32:43,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:43,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:43,927 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 [2021-07-13 20:32:43,928 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:43,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:43,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:43,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 20:32:43,983 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:43,989 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:32:43,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 20:32:43,990 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:44,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:44,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 3 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-13 20:32:44,035 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 10 variables, input treesize:153, output treesize:115 [2021-07-13 20:32:48,125 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 59 [2021-07-13 20:32:48,201 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:32:48,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063818093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:48,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:48,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 30 [2021-07-13 20:32:48,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142245381] [2021-07-13 20:32:48,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:32:48,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:48,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:32:48,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=832, Unknown=1, NotChecked=0, Total=930 [2021-07-13 20:32:48,202 INFO L87 Difference]: Start difference. First operand 4708 states and 23570 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:49,112 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 Received shutdown request... [2021-07-13 20:32:55,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:32:55,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1063,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:55,665 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 20:32:55,668 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 20:32:55,669 WARN L196 ceAbstractionStarter]: Timeout [2021-07-13 20:32:55,669 INFO L202 PluginConnector]: Adding new model commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 08:32:55 BasicIcfg [2021-07-13 20:32:55,669 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 20:32:55,669 INFO L168 Benchmark]: Toolchain (without parser) took 846745.32 ms. Allocated memory was 210.8 MB in the beginning and 843.1 MB in the end (delta: 632.3 MB). Free memory was 189.7 MB in the beginning and 443.3 MB in the end (delta: -253.7 MB). Peak memory consumption was 379.9 MB. Max. memory is 8.0 GB. [2021-07-13 20:32:55,669 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 210.8 MB. Free memory was 191.0 MB in the beginning and 190.9 MB in the end (delta: 88.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:32:55,669 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.70 ms. Allocated memory is still 210.8 MB. Free memory was 189.6 MB in the beginning and 188.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-13 20:32:55,669 INFO L168 Benchmark]: Boogie Preprocessor took 35.48 ms. Allocated memory is still 210.8 MB. Free memory was 188.0 MB in the beginning and 186.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 20:32:55,669 INFO L168 Benchmark]: RCFGBuilder took 534.25 ms. Allocated memory is still 210.8 MB. Free memory was 186.8 MB in the beginning and 181.0 MB in the end (delta: 5.9 MB). Peak memory consumption was 27.8 MB. Max. memory is 8.0 GB. [2021-07-13 20:32:55,670 INFO L168 Benchmark]: TraceAbstraction took 846143.08 ms. Allocated memory was 210.8 MB in the beginning and 843.1 MB in the end (delta: 632.3 MB). Free memory was 180.4 MB in the beginning and 443.3 MB in the end (delta: -262.9 MB). Peak memory consumption was 369.9 MB. Max. memory is 8.0 GB. [2021-07-13 20:32:55,670 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 210.8 MB. Free memory was 191.0 MB in the beginning and 190.9 MB in the end (delta: 88.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 27.70 ms. Allocated memory is still 210.8 MB. Free memory was 189.6 MB in the beginning and 188.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.48 ms. Allocated memory is still 210.8 MB. Free memory was 188.0 MB in the beginning and 186.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 534.25 ms. Allocated memory is still 210.8 MB. Free memory was 186.8 MB in the beginning and 181.0 MB in the end (delta: 5.9 MB). Peak memory consumption was 27.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 846143.08 ms. Allocated memory was 210.8 MB in the beginning and 843.1 MB in the end (delta: 632.3 MB). Free memory was 180.4 MB in the beginning and 443.3 MB in the end (delta: -262.9 MB). Peak memory consumption was 369.9 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 constructing difference of abstraction (4708states) and FLOYD_HOARE automaton (currently 22 states, 31 states before enhancement),while ReachableStatesComputation was computing reachable states (398 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 9 procedures, 34 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 846032.3ms, OverallIterations: 278, TraceHistogramMax: 9, EmptinessCheckTime: 704.6ms, AutomataDifference: 368496.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 22.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 10895 SDtfs, 18648 SDslu, 142705 SDs, 0 SdLazy, 84081 SolverSat, 5121 SolverUnsat, 19 SolverUnknown, 0 SolverNotchecked, 81021.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11898 GetRequests, 4272 SyntacticMatches, 10 SemanticMatches, 7616 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41640 ImplicationChecksByTransitivity, 629559.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=4708occurred in iteration=277, InterpolantAutomatonStates: 4446, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 7222.3ms AutomataMinimizationTime, 277 MinimizatonAttempts, 47929 StatesRemovedByMinimization, 272 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2340.8ms SsaConstructionTime, 6919.7ms SatisfiabilityAnalysisTime, 397715.3ms InterpolantComputationTime, 14308 NumberOfCodeBlocks, 14307 NumberOfCodeBlocksAsserted, 1238 NumberOfCheckSat, 13756 ConstructedInterpolants, 790 QuantifiedInterpolants, 286317 SizeOfPredicates, 3714 NumberOfNonLiveVariables, 20821 ConjunctsInSsa, 5183 ConjunctsInUnsatCore, 552 InterpolantComputations, 4 PerfectInterpolantSequences, 1946/15772 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