/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9b7772ad7705253c1305067fc38dc9bc7271fbe3-9b7772a [2021-04-15 04:27:02,204 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 04:27:02,205 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 04:27:02,238 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-04-15 04:27:02,238 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-04-15 04:27:02,241 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-04-15 04:27:02,242 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-04-15 04:27:02,247 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-04-15 04:27:02,249 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-04-15 04:27:02,253 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-04-15 04:27:02,254 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-04-15 04:27:02,255 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-04-15 04:27:02,255 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-15 04:27:02,257 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-15 04:27:02,258 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-15 04:27:02,259 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-15 04:27:02,262 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-15 04:27:02,263 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-15 04:27:02,265 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-15 04:27:02,268 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-15 04:27:02,268 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-15 04:27:02,274 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-15 04:27:02,275 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-15 04:27:02,276 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-15 04:27:02,277 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-04-15 04:27:02,277 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-04-15 04:27:02,278 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-04-15 04:27:02,278 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-04-15 04:27:02,278 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-04-15 04:27:02,279 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-04-15 04:27:02,279 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-04-15 04:27:02,279 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-04-15 04:27:02,280 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-04-15 04:27:02,280 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-04-15 04:27:02,282 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-04-15 04:27:02,283 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-04-15 04:27:02,283 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-04-15 04:27:02,283 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-04-15 04:27:02,283 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-15 04:27:02,284 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-15 04:27:02,284 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-15 04:27:02,287 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 [2021-04-15 04:27:02,311 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 04:27:02,311 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 04:27:02,311 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-04-15 04:27:02,311 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-04-15 04:27:02,312 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 04:27:02,312 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 04:27:02,312 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 04:27:02,313 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 04:27:02,313 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 04:27:02,313 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 04:27:02,313 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 04:27:02,313 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 04:27:02,313 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 04:27:02,313 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 04:27:02,313 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 04:27:02,313 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 04:27:02,313 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 04:27:02,314 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 04:27:02,314 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 04:27:02,314 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 04:27:02,314 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 04:27:02,314 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-15 04:27:02,314 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 04:27:02,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 04:27:02,314 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 04:27:02,314 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 04:27:02,314 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 04:27:02,315 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 04:27:02,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 04:27:02,315 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-04-15 04:27:02,315 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 04:27:02,315 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 04:27:02,538 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 04:27:02,557 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 04:27:02,559 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 04:27:02,559 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-04-15 04:27:02,560 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-04-15 04:27:02,561 INFO L432 ainManager$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 [2021-04-15 04:27:02,561 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-2.wvr.bpl' [2021-04-15 04:27:02,624 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 04:27:02,625 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 04:27:02,626 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-15 04:27:02,627 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-15 04:27:02,627 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-15 04:27:02,635 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 15.04 04:27:02" (1/1) ... [2021-04-15 04:27:02,643 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 15.04 04:27:02" (1/1) ... [2021-04-15 04:27:02,649 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-15 04:27:02,651 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 04:27:02,651 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 04:27:02,652 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 04:27:02,657 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:27:02" (1/1) ... [2021-04-15 04:27:02,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:27:02" (1/1) ... [2021-04-15 04:27:02,658 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:27:02" (1/1) ... [2021-04-15 04:27:02,658 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:27:02" (1/1) ... [2021-04-15 04:27:02,661 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:27:02" (1/1) ... [2021-04-15 04:27:02,663 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:27:02" (1/1) ... [2021-04-15 04:27:02,664 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:27:02" (1/1) ... [2021-04-15 04:27:02,665 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 04:27:02,665 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 04:27:02,665 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 04:27:02,665 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 04:27:02,667 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:27:02" (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 [2021-04-15 04:27:02,729 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-04-15 04:27:02,729 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-04-15 04:27:02,729 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-04-15 04:27:02,729 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-04-15 04:27:02,729 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-04-15 04:27:02,729 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-04-15 04:27:02,730 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-04-15 04:27:02,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 04:27:02,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 04:27:02,731 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-04-15 04:27:02,731 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-04-15 04:27:02,731 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-04-15 04:27:02,731 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-04-15 04:27:02,731 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-04-15 04:27:02,731 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-04-15 04:27:02,732 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-04-15 04:27:03,218 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 04:27:03,218 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-04-15 04:27:03,219 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-04-15 04:27:03,220 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-04-15 04:27:03,220 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-04-15 04:27:03,221 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread4EXIT is neither atomic block end nor error location. [2021-04-15 04:27:03,222 INFO L202 PluginConnector]: Adding new model commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 04:27:03 BoogieIcfgContainer [2021-04-15 04:27:03,223 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 04:27:03,224 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 04:27:03,225 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 04:27:03,227 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 04:27:03,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:27:02" (1/2) ... [2021-04-15 04:27:03,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6827c546 and model type commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 04:27:03, skipping insertion in model container [2021-04-15 04:27:03,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 04:27:03" (2/2) ... [2021-04-15 04:27:03,233 INFO L111 eAbstractionObserver]: Analyzing ICFG commit-2.wvr.bpl [2021-04-15 04:27:03,237 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-04-15 04:27:03,237 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 04:27:03,241 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 04:27:03,242 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-15 04:27:03,282 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-04-15 04:27:03,294 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-04-15 04:27:03,320 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 04:27:03,320 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 04:27:03,320 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 04:27:03,321 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 04:27:03,321 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 04:27:03,321 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 04:27:03,321 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 04:27:03,321 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 04:27:03,329 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 25 transitions, 82 flow [2021-04-15 04:27:03,338 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 51 states, 49 states have (on average 3.4081632653061225) internal successors, (167), 50 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:03,340 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 49 states have (on average 3.4081632653061225) internal successors, (167), 50 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:03,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 04:27:03,345 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:03,346 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:03,346 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:03,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:03,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1687097808, now seen corresponding path program 1 times [2021-04-15 04:27:03,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:03,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219123969] [2021-04-15 04:27:03,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:03,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:03,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:03,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219123969] [2021-04-15 04:27:03,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 04:27:03,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-04-15 04:27:03,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209051214] [2021-04-15 04:27:03,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 04:27:03,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:03,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 04:27:03,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 04:27:03,477 INFO L87 Difference]: Start difference. First operand has 51 states, 49 states have (on average 3.4081632653061225) internal successors, (167), 50 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:03,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:03,518 INFO L93 Difference]: Finished difference Result 94 states and 326 transitions. [2021-04-15 04:27:03,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 04:27:03,529 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 [2021-04-15 04:27:03,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:03,538 INFO L225 Difference]: With dead ends: 94 [2021-04-15 04:27:03,539 INFO L226 Difference]: Without dead ends: 89 [2021-04-15 04:27:03,540 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 04:27:03,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-04-15 04:27:03,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-04-15 04:27:03,579 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) [2021-04-15 04:27:03,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 312 transitions. [2021-04-15 04:27:03,583 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 312 transitions. Word has length 15 [2021-04-15 04:27:03,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:03,584 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 312 transitions. [2021-04-15 04:27:03,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:03,585 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 312 transitions. [2021-04-15 04:27:03,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 04:27:03,587 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:03,587 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:03,587 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 04:27:03,588 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:03,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:03,590 INFO L82 PathProgramCache]: Analyzing trace with hash -759854521, now seen corresponding path program 1 times [2021-04-15 04:27:03,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:03,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651123823] [2021-04-15 04:27:03,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:03,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:03,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:03,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651123823] [2021-04-15 04:27:03,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891066676] [2021-04-15 04:27:03,676 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 [2021-04-15 04:27:03,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:03,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-04-15 04:27:03,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:03,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:03,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:03,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-04-15 04:27:03,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339654628] [2021-04-15 04:27:03,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 04:27:03,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:03,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 04:27:03,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-04-15 04:27:03,823 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) [2021-04-15 04:27:03,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:03,852 INFO L93 Difference]: Finished difference Result 120 states and 425 transitions. [2021-04-15 04:27:03,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 04:27:03,853 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 [2021-04-15 04:27:03,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:03,856 INFO L225 Difference]: With dead ends: 120 [2021-04-15 04:27:03,856 INFO L226 Difference]: Without dead ends: 106 [2021-04-15 04:27:03,856 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-04-15 04:27:03,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-04-15 04:27:03,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2021-04-15 04:27:03,896 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) [2021-04-15 04:27:03,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 295 transitions. [2021-04-15 04:27:03,897 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 295 transitions. Word has length 16 [2021-04-15 04:27:03,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:03,897 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 295 transitions. [2021-04-15 04:27:03,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:03,897 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 295 transitions. [2021-04-15 04:27:03,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 04:27:03,898 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:03,898 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:04,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-04-15 04:27:04,115 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:04,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:04,115 INFO L82 PathProgramCache]: Analyzing trace with hash -263000223, now seen corresponding path program 1 times [2021-04-15 04:27:04,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:04,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725855017] [2021-04-15 04:27:04,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:04,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:04,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:04,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725855017] [2021-04-15 04:27:04,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 04:27:04,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-04-15 04:27:04,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265992312] [2021-04-15 04:27:04,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 04:27:04,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:04,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 04:27:04,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 04:27:04,166 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) [2021-04-15 04:27:04,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:04,172 INFO L93 Difference]: Finished difference Result 129 states and 418 transitions. [2021-04-15 04:27:04,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 04:27:04,173 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 [2021-04-15 04:27:04,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:04,174 INFO L225 Difference]: With dead ends: 129 [2021-04-15 04:27:04,174 INFO L226 Difference]: Without dead ends: 121 [2021-04-15 04:27:04,174 INFO L807 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 [2021-04-15 04:27:04,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-04-15 04:27:04,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 98. [2021-04-15 04:27:04,180 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) [2021-04-15 04:27:04,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 337 transitions. [2021-04-15 04:27:04,181 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 337 transitions. Word has length 16 [2021-04-15 04:27:04,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:04,181 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 337 transitions. [2021-04-15 04:27:04,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:04,182 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 337 transitions. [2021-04-15 04:27:04,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 04:27:04,182 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:04,182 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:04,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-15 04:27:04,183 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:04,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:04,183 INFO L82 PathProgramCache]: Analyzing trace with hash 675491683, now seen corresponding path program 1 times [2021-04-15 04:27:04,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:04,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717473329] [2021-04-15 04:27:04,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:04,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:04,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:04,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717473329] [2021-04-15 04:27:04,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 04:27:04,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-04-15 04:27:04,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301818494] [2021-04-15 04:27:04,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 04:27:04,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:04,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 04:27:04,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 04:27:04,216 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) [2021-04-15 04:27:04,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:04,228 INFO L93 Difference]: Finished difference Result 76 states and 237 transitions. [2021-04-15 04:27:04,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 04:27:04,229 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 [2021-04-15 04:27:04,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:04,230 INFO L225 Difference]: With dead ends: 76 [2021-04-15 04:27:04,230 INFO L226 Difference]: Without dead ends: 64 [2021-04-15 04:27:04,231 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 04:27:04,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-04-15 04:27:04,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-04-15 04:27:04,239 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) [2021-04-15 04:27:04,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 208 transitions. [2021-04-15 04:27:04,239 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 208 transitions. Word has length 16 [2021-04-15 04:27:04,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:04,239 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 208 transitions. [2021-04-15 04:27:04,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:04,239 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 208 transitions. [2021-04-15 04:27:04,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 04:27:04,241 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:04,241 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:04,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-04-15 04:27:04,241 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:04,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:04,242 INFO L82 PathProgramCache]: Analyzing trace with hash 135060591, now seen corresponding path program 1 times [2021-04-15 04:27:04,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:04,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969429293] [2021-04-15 04:27:04,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:04,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:04,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:04,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969429293] [2021-04-15 04:27:04,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597584761] [2021-04-15 04:27:04,282 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 [2021-04-15 04:27:04,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:04,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-04-15 04:27:04,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:04,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:04,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:04,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-04-15 04:27:04,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345631678] [2021-04-15 04:27:04,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 04:27:04,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:04,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 04:27:04,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-04-15 04:27:04,415 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) [2021-04-15 04:27:04,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:04,433 INFO L93 Difference]: Finished difference Result 115 states and 389 transitions. [2021-04-15 04:27:04,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 04:27:04,434 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 [2021-04-15 04:27:04,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:04,436 INFO L225 Difference]: With dead ends: 115 [2021-04-15 04:27:04,436 INFO L226 Difference]: Without dead ends: 108 [2021-04-15 04:27:04,436 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.9ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-04-15 04:27:04,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-04-15 04:27:04,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-04-15 04:27:04,448 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) [2021-04-15 04:27:04,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 367 transitions. [2021-04-15 04:27:04,450 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 367 transitions. Word has length 16 [2021-04-15 04:27:04,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:04,450 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 367 transitions. [2021-04-15 04:27:04,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:04,450 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 367 transitions. [2021-04-15 04:27:04,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 04:27:04,453 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:04,453 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:04,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:04,672 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:04,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:04,672 INFO L82 PathProgramCache]: Analyzing trace with hash -107519000, now seen corresponding path program 1 times [2021-04-15 04:27:04,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:04,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652651466] [2021-04-15 04:27:04,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:04,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:04,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:04,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652651466] [2021-04-15 04:27:04,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027217114] [2021-04-15 04:27:04,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:04,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:04,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2021-04-15 04:27:04,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:04,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:27:04,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-04-15 04:27:04,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-04-15 04:27:04,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103586290] [2021-04-15 04:27:04,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 04:27:04,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:04,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 04:27:04,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-04-15 04:27:04,806 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) [2021-04-15 04:27:04,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:04,817 INFO L93 Difference]: Finished difference Result 57 states and 166 transitions. [2021-04-15 04:27:04,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 04:27:04,817 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 [2021-04-15 04:27:04,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:04,817 INFO L225 Difference]: With dead ends: 57 [2021-04-15 04:27:04,818 INFO L226 Difference]: Without dead ends: 54 [2021-04-15 04:27:04,818 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 18.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-04-15 04:27:04,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-04-15 04:27:04,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-04-15 04:27:04,819 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) [2021-04-15 04:27:04,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 161 transitions. [2021-04-15 04:27:04,820 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 161 transitions. Word has length 17 [2021-04-15 04:27:04,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:04,820 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 161 transitions. [2021-04-15 04:27:04,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:04,820 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 161 transitions. [2021-04-15 04:27:04,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 04:27:04,820 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:04,820 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:05,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:05,037 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:05,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:05,038 INFO L82 PathProgramCache]: Analyzing trace with hash -2041236514, now seen corresponding path program 2 times [2021-04-15 04:27:05,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:05,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16300173] [2021-04-15 04:27:05,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:05,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:05,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:05,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16300173] [2021-04-15 04:27:05,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569414241] [2021-04-15 04:27:05,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:05,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:27:05,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:05,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 04:27:05,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:05,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:05,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:05,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-04-15 04:27:05,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190665266] [2021-04-15 04:27:05,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 04:27:05,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:05,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 04:27:05,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-04-15 04:27:05,164 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) [2021-04-15 04:27:05,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:05,198 INFO L93 Difference]: Finished difference Result 93 states and 298 transitions. [2021-04-15 04:27:05,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 04:27:05,198 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 [2021-04-15 04:27:05,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:05,199 INFO L225 Difference]: With dead ends: 93 [2021-04-15 04:27:05,199 INFO L226 Difference]: Without dead ends: 88 [2021-04-15 04:27:05,199 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-04-15 04:27:05,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-04-15 04:27:05,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-04-15 04:27:05,201 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) [2021-04-15 04:27:05,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 283 transitions. [2021-04-15 04:27:05,202 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 283 transitions. Word has length 17 [2021-04-15 04:27:05,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:05,202 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 283 transitions. [2021-04-15 04:27:05,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:05,202 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 283 transitions. [2021-04-15 04:27:05,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 04:27:05,203 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:05,203 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:05,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:05,416 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:05,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:05,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1146747481, now seen corresponding path program 3 times [2021-04-15 04:27:05,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:05,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726563573] [2021-04-15 04:27:05,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:05,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:05,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:05,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726563573] [2021-04-15 04:27:05,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696380753] [2021-04-15 04:27:05,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:05,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 04:27:05,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:05,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 04:27:05,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:05,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:05,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:05,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-04-15 04:27:05,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768765260] [2021-04-15 04:27:05,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 04:27:05,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:05,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 04:27:05,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-04-15 04:27:05,767 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) [2021-04-15 04:27:05,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:05,863 INFO L93 Difference]: Finished difference Result 144 states and 469 transitions. [2021-04-15 04:27:05,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 04:27:05,863 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 [2021-04-15 04:27:05,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:05,864 INFO L225 Difference]: With dead ends: 144 [2021-04-15 04:27:05,864 INFO L226 Difference]: Without dead ends: 135 [2021-04-15 04:27:05,864 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 137.8ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-04-15 04:27:05,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-04-15 04:27:05,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 106. [2021-04-15 04:27:05,870 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) [2021-04-15 04:27:05,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 370 transitions. [2021-04-15 04:27:05,871 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 370 transitions. Word has length 18 [2021-04-15 04:27:05,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:05,871 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 370 transitions. [2021-04-15 04:27:05,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:05,871 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 370 transitions. [2021-04-15 04:27:05,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 04:27:05,873 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:05,873 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:06,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:06,089 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:06,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:06,089 INFO L82 PathProgramCache]: Analyzing trace with hash 613124629, now seen corresponding path program 4 times [2021-04-15 04:27:06,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:06,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887385883] [2021-04-15 04:27:06,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:06,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:06,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:06,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887385883] [2021-04-15 04:27:06,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861207076] [2021-04-15 04:27:06,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:06,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:27:06,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:06,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 04:27:06,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:06,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:06,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:06,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-04-15 04:27:06,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390762817] [2021-04-15 04:27:06,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 04:27:06,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:06,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 04:27:06,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-04-15 04:27:06,339 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) [2021-04-15 04:27:06,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:06,384 INFO L93 Difference]: Finished difference Result 179 states and 628 transitions. [2021-04-15 04:27:06,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 04:27:06,384 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 [2021-04-15 04:27:06,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:06,385 INFO L225 Difference]: With dead ends: 179 [2021-04-15 04:27:06,385 INFO L226 Difference]: Without dead ends: 169 [2021-04-15 04:27:06,385 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 83.1ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-04-15 04:27:06,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-04-15 04:27:06,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 133. [2021-04-15 04:27:06,389 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) [2021-04-15 04:27:06,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 491 transitions. [2021-04-15 04:27:06,389 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 491 transitions. Word has length 18 [2021-04-15 04:27:06,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:06,389 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 491 transitions. [2021-04-15 04:27:06,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:06,389 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 491 transitions. [2021-04-15 04:27:06,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 04:27:06,390 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:06,390 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:06,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:06,606 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:06,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:06,606 INFO L82 PathProgramCache]: Analyzing trace with hash 64866445, now seen corresponding path program 1 times [2021-04-15 04:27:06,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:06,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152730421] [2021-04-15 04:27:06,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:06,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:06,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:06,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152730421] [2021-04-15 04:27:06,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300542792] [2021-04-15 04:27:06,653 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 [2021-04-15 04:27:06,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:06,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 04:27:06,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:06,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:06,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:06,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2021-04-15 04:27:06,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482869020] [2021-04-15 04:27:06,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 04:27:06,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:06,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 04:27:06,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-04-15 04:27:06,840 INFO L87 Difference]: Start difference. First operand 133 states and 491 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:06,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:06,932 INFO L93 Difference]: Finished difference Result 260 states and 963 transitions. [2021-04-15 04:27:06,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 04:27:06,933 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 04:27:06,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:06,934 INFO L225 Difference]: With dead ends: 260 [2021-04-15 04:27:06,934 INFO L226 Difference]: Without dead ends: 249 [2021-04-15 04:27:06,934 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 121.2ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-04-15 04:27:06,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-04-15 04:27:06,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 174. [2021-04-15 04:27:06,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 4.005780346820809) internal successors, (693), 173 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:06,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 693 transitions. [2021-04-15 04:27:06,939 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 693 transitions. Word has length 18 [2021-04-15 04:27:06,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:06,939 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 693 transitions. [2021-04-15 04:27:06,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:06,941 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 693 transitions. [2021-04-15 04:27:06,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 04:27:06,942 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:06,942 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:07,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:07,157 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:07,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:07,157 INFO L82 PathProgramCache]: Analyzing trace with hash 764509993, now seen corresponding path program 1 times [2021-04-15 04:27:07,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:07,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340485313] [2021-04-15 04:27:07,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:07,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:07,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:07,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340485313] [2021-04-15 04:27:07,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289166028] [2021-04-15 04:27:07,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:07,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:07,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 04:27:07,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:07,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:07,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:07,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-04-15 04:27:07,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276310521] [2021-04-15 04:27:07,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 04:27:07,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:07,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 04:27:07,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-04-15 04:27:07,390 INFO L87 Difference]: Start difference. First operand 174 states and 693 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:07,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:07,444 INFO L93 Difference]: Finished difference Result 176 states and 684 transitions. [2021-04-15 04:27:07,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 04:27:07,445 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 [2021-04-15 04:27:07,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:07,446 INFO L225 Difference]: With dead ends: 176 [2021-04-15 04:27:07,446 INFO L226 Difference]: Without dead ends: 168 [2021-04-15 04:27:07,446 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 84.8ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-04-15 04:27:07,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-04-15 04:27:07,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2021-04-15 04:27:07,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 4.0) internal successors, (668), 167 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:07,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 668 transitions. [2021-04-15 04:27:07,450 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 668 transitions. Word has length 18 [2021-04-15 04:27:07,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:07,451 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 668 transitions. [2021-04-15 04:27:07,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:07,451 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 668 transitions. [2021-04-15 04:27:07,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 04:27:07,451 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:07,451 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:07,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-04-15 04:27:07,670 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:07,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:07,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1447544248, now seen corresponding path program 2 times [2021-04-15 04:27:07,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:07,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618392178] [2021-04-15 04:27:07,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:07,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:07,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:07,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618392178] [2021-04-15 04:27:07,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233965809] [2021-04-15 04:27:07,728 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 [2021-04-15 04:27:07,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:27:07,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:07,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 04:27:07,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:08,030 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:08,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:08,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-04-15 04:27:08,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603403444] [2021-04-15 04:27:08,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 04:27:08,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:08,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 04:27:08,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-04-15 04:27:08,032 INFO L87 Difference]: Start difference. First operand 168 states and 668 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:08,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:08,218 INFO L93 Difference]: Finished difference Result 377 states and 1547 transitions. [2021-04-15 04:27:08,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 04:27:08,219 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 [2021-04-15 04:27:08,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:08,221 INFO L225 Difference]: With dead ends: 377 [2021-04-15 04:27:08,221 INFO L226 Difference]: Without dead ends: 372 [2021-04-15 04:27:08,221 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 257.9ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-04-15 04:27:08,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-04-15 04:27:08,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 222. [2021-04-15 04:27:08,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 4.398190045248869) internal successors, (972), 221 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:08,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 972 transitions. [2021-04-15 04:27:08,228 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 972 transitions. Word has length 19 [2021-04-15 04:27:08,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:08,228 INFO L480 AbstractCegarLoop]: Abstraction has 222 states and 972 transitions. [2021-04-15 04:27:08,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:08,228 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 972 transitions. [2021-04-15 04:27:08,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 04:27:08,229 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:08,229 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:08,441 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-04-15 04:27:08,442 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:08,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:08,442 INFO L82 PathProgramCache]: Analyzing trace with hash 820488117, now seen corresponding path program 5 times [2021-04-15 04:27:08,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:08,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047832949] [2021-04-15 04:27:08,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:08,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:08,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:08,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047832949] [2021-04-15 04:27:08,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086302766] [2021-04-15 04:27:08,517 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 [2021-04-15 04:27:08,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 04:27:08,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:08,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 04:27:08,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:08,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-04-15 04:27:08,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:08,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-04-15 04:27:08,667 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:08,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:08,688 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. [2021-04-15 04:27:08,689 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:57 [2021-04-15 04:27:08,776 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:27:08,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:08,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-04-15 04:27:08,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296527150] [2021-04-15 04:27:08,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 04:27:08,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:08,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 04:27:08,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-04-15 04:27:08,778 INFO L87 Difference]: Start difference. First operand 222 states and 972 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:08,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:08,923 INFO L93 Difference]: Finished difference Result 416 states and 1719 transitions. [2021-04-15 04:27:08,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 04:27:08,923 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 [2021-04-15 04:27:08,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:08,927 INFO L225 Difference]: With dead ends: 416 [2021-04-15 04:27:08,928 INFO L226 Difference]: Without dead ends: 407 [2021-04-15 04:27:08,928 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 206.4ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-04-15 04:27:08,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-04-15 04:27:08,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 260. [2021-04-15 04:27:08,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 4.463320463320463) internal successors, (1156), 259 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:08,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 1156 transitions. [2021-04-15 04:27:08,940 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 1156 transitions. Word has length 20 [2021-04-15 04:27:08,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:08,940 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 1156 transitions. [2021-04-15 04:27:08,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:08,940 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 1156 transitions. [2021-04-15 04:27:08,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 04:27:08,941 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:08,941 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:09,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:09,158 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:09,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:09,158 INFO L82 PathProgramCache]: Analyzing trace with hash 924426037, now seen corresponding path program 6 times [2021-04-15 04:27:09,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:09,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637978396] [2021-04-15 04:27:09,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:09,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:09,235 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:09,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637978396] [2021-04-15 04:27:09,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831737095] [2021-04-15 04:27:09,235 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 [2021-04-15 04:27:09,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 04:27:09,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:09,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 04:27:09,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:09,364 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:09,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:09,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-04-15 04:27:09,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546177805] [2021-04-15 04:27:09,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 04:27:09,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:09,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 04:27:09,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-04-15 04:27:09,366 INFO L87 Difference]: Start difference. First operand 260 states and 1156 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:09,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:09,433 INFO L93 Difference]: Finished difference Result 287 states and 1222 transitions. [2021-04-15 04:27:09,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 04:27:09,433 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 [2021-04-15 04:27:09,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:09,435 INFO L225 Difference]: With dead ends: 287 [2021-04-15 04:27:09,435 INFO L226 Difference]: Without dead ends: 283 [2021-04-15 04:27:09,435 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 118.6ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-04-15 04:27:09,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-04-15 04:27:09,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 260. [2021-04-15 04:27:09,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 4.413127413127413) internal successors, (1143), 259 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:09,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 1143 transitions. [2021-04-15 04:27:09,443 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 1143 transitions. Word has length 20 [2021-04-15 04:27:09,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:09,443 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 1143 transitions. [2021-04-15 04:27:09,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:09,443 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 1143 transitions. [2021-04-15 04:27:09,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 04:27:09,446 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:09,446 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:09,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-04-15 04:27:09,661 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:09,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:09,662 INFO L82 PathProgramCache]: Analyzing trace with hash -257751127, now seen corresponding path program 2 times [2021-04-15 04:27:09,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:09,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739990399] [2021-04-15 04:27:09,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:09,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:09,762 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:09,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739990399] [2021-04-15 04:27:09,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562206161] [2021-04-15 04:27:09,763 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 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 [2021-04-15 04:27:09,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:27:09,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:09,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 04:27:09,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:09,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-04-15 04:27:09,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:09,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-04-15 04:27:09,904 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:09,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:09,927 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. [2021-04-15 04:27:09,927 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:57 [2021-04-15 04:27:10,010 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:27:10,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:10,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-04-15 04:27:10,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644671521] [2021-04-15 04:27:10,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 04:27:10,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:10,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 04:27:10,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-04-15 04:27:10,012 INFO L87 Difference]: Start difference. First operand 260 states and 1143 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:10,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:10,237 INFO L93 Difference]: Finished difference Result 456 states and 1883 transitions. [2021-04-15 04:27:10,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 04:27:10,237 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 04:27:10,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:10,244 INFO L225 Difference]: With dead ends: 456 [2021-04-15 04:27:10,244 INFO L226 Difference]: Without dead ends: 445 [2021-04-15 04:27:10,246 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 264.9ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-04-15 04:27:10,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-04-15 04:27:10,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 289. [2021-04-15 04:27:10,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 4.489583333333333) internal successors, (1293), 288 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:10,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 1293 transitions. [2021-04-15 04:27:10,266 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 1293 transitions. Word has length 20 [2021-04-15 04:27:10,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:10,267 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 1293 transitions. [2021-04-15 04:27:10,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:10,267 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 1293 transitions. [2021-04-15 04:27:10,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 04:27:10,267 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:10,268 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:10,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:10,481 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:10,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:10,481 INFO L82 PathProgramCache]: Analyzing trace with hash -626942165, now seen corresponding path program 3 times [2021-04-15 04:27:10,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:10,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230899436] [2021-04-15 04:27:10,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:10,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:10,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:10,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230899436] [2021-04-15 04:27:10,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254590271] [2021-04-15 04:27:10,531 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 [2021-04-15 04:27:10,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 04:27:10,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:10,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 04:27:10,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:10,756 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:10,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:10,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-04-15 04:27:10,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208486738] [2021-04-15 04:27:10,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 04:27:10,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:10,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 04:27:10,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-04-15 04:27:10,757 INFO L87 Difference]: Start difference. First operand 289 states and 1293 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:10,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:10,950 INFO L93 Difference]: Finished difference Result 536 states and 2256 transitions. [2021-04-15 04:27:10,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 04:27:10,951 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 [2021-04-15 04:27:10,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:10,954 INFO L225 Difference]: With dead ends: 536 [2021-04-15 04:27:10,954 INFO L226 Difference]: Without dead ends: 531 [2021-04-15 04:27:10,954 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 259.5ms TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-04-15 04:27:10,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-04-15 04:27:10,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 316. [2021-04-15 04:27:10,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 4.584126984126984) internal successors, (1444), 315 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:10,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 1444 transitions. [2021-04-15 04:27:10,965 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 1444 transitions. Word has length 20 [2021-04-15 04:27:10,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:10,965 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 1444 transitions. [2021-04-15 04:27:10,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:10,965 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 1444 transitions. [2021-04-15 04:27:10,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 04:27:10,966 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:10,966 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:11,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-04-15 04:27:11,181 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:11,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:11,181 INFO L82 PathProgramCache]: Analyzing trace with hash -760999699, now seen corresponding path program 4 times [2021-04-15 04:27:11,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:11,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148129030] [2021-04-15 04:27:11,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:11,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:11,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:11,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148129030] [2021-04-15 04:27:11,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337648971] [2021-04-15 04:27:11,278 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 [2021-04-15 04:27:11,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:27:11,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:11,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 04:27:11,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:11,451 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:11,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:11,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-04-15 04:27:11,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561495865] [2021-04-15 04:27:11,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 04:27:11,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:11,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 04:27:11,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-04-15 04:27:11,453 INFO L87 Difference]: Start difference. First operand 316 states and 1444 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:11,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:11,661 INFO L93 Difference]: Finished difference Result 445 states and 1897 transitions. [2021-04-15 04:27:11,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 04:27:11,662 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 04:27:11,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:11,664 INFO L225 Difference]: With dead ends: 445 [2021-04-15 04:27:11,664 INFO L226 Difference]: Without dead ends: 435 [2021-04-15 04:27:11,665 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 253.0ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-04-15 04:27:11,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-04-15 04:27:11,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 335. [2021-04-15 04:27:11,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 4.604790419161676) internal successors, (1538), 334 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:11,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1538 transitions. [2021-04-15 04:27:11,680 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1538 transitions. Word has length 20 [2021-04-15 04:27:11,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:11,680 INFO L480 AbstractCegarLoop]: Abstraction has 335 states and 1538 transitions. [2021-04-15 04:27:11,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:11,680 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1538 transitions. [2021-04-15 04:27:11,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 04:27:11,681 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:11,681 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:11,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:11,896 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:11,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:11,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1175269464, now seen corresponding path program 7 times [2021-04-15 04:27:11,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:11,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873332476] [2021-04-15 04:27:11,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:11,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:12,018 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:27:12,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873332476] [2021-04-15 04:27:12,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561496235] [2021-04-15 04:27:12,018 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 [2021-04-15 04:27:12,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:12,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 04:27:12,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:12,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-04-15 04:27:12,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:12,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-04-15 04:27:12,184 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:12,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:12,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-04-15 04:27:12,213 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:12,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-04-15 04:27:12,217 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:12,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:12,242 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. [2021-04-15 04:27:12,242 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:85, output treesize:57 [2021-04-15 04:27:12,317 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:27:12,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:12,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-04-15 04:27:12,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479114878] [2021-04-15 04:27:12,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 04:27:12,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:12,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 04:27:12,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-04-15 04:27:12,319 INFO L87 Difference]: Start difference. First operand 335 states and 1538 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:12,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:12,505 INFO L93 Difference]: Finished difference Result 466 states and 1917 transitions. [2021-04-15 04:27:12,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 04:27:12,506 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 [2021-04-15 04:27:12,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:12,508 INFO L225 Difference]: With dead ends: 466 [2021-04-15 04:27:12,508 INFO L226 Difference]: Without dead ends: 452 [2021-04-15 04:27:12,509 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 304.2ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-04-15 04:27:12,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-04-15 04:27:12,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 368. [2021-04-15 04:27:12,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 4.405994550408719) internal successors, (1617), 367 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:12,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1617 transitions. [2021-04-15 04:27:12,519 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1617 transitions. Word has length 21 [2021-04-15 04:27:12,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:12,519 INFO L480 AbstractCegarLoop]: Abstraction has 368 states and 1617 transitions. [2021-04-15 04:27:12,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:12,519 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1617 transitions. [2021-04-15 04:27:12,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 04:27:12,520 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:12,521 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:12,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:12,732 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:12,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:12,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1429441592, now seen corresponding path program 3 times [2021-04-15 04:27:12,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:12,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663675283] [2021-04-15 04:27:12,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:12,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:12,828 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:12,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663675283] [2021-04-15 04:27:12,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717162510] [2021-04-15 04:27:12,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:12,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 04:27:12,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:12,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 04:27:12,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:13,028 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:13,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:13,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-04-15 04:27:13,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614213434] [2021-04-15 04:27:13,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 04:27:13,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:13,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 04:27:13,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-04-15 04:27:13,029 INFO L87 Difference]: Start difference. First operand 368 states and 1617 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:13,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:13,201 INFO L93 Difference]: Finished difference Result 398 states and 1680 transitions. [2021-04-15 04:27:13,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 04:27:13,202 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 [2021-04-15 04:27:13,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:13,204 INFO L225 Difference]: With dead ends: 398 [2021-04-15 04:27:13,204 INFO L226 Difference]: Without dead ends: 396 [2021-04-15 04:27:13,204 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 277.3ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-04-15 04:27:13,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-04-15 04:27:13,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 372. [2021-04-15 04:27:13,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 4.380053908355795) internal successors, (1625), 371 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:13,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1625 transitions. [2021-04-15 04:27:13,247 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1625 transitions. Word has length 21 [2021-04-15 04:27:13,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:13,247 INFO L480 AbstractCegarLoop]: Abstraction has 372 states and 1625 transitions. [2021-04-15 04:27:13,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:13,247 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1625 transitions. [2021-04-15 04:27:13,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 04:27:13,248 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:13,248 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:13,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:13,449 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:13,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:13,450 INFO L82 PathProgramCache]: Analyzing trace with hash -958081368, now seen corresponding path program 5 times [2021-04-15 04:27:13,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:13,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752563919] [2021-04-15 04:27:13,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:13,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:13,499 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:13,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752563919] [2021-04-15 04:27:13,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054391247] [2021-04-15 04:27:13,500 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 [2021-04-15 04:27:13,532 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 04:27:13,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:13,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 04:27:13,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:13,686 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:13,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:13,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-04-15 04:27:13,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108473416] [2021-04-15 04:27:13,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 04:27:13,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:13,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 04:27:13,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-04-15 04:27:13,687 INFO L87 Difference]: Start difference. First operand 372 states and 1625 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:13,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:13,826 INFO L93 Difference]: Finished difference Result 979 states and 4133 transitions. [2021-04-15 04:27:13,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 04:27:13,826 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 04:27:13,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:13,832 INFO L225 Difference]: With dead ends: 979 [2021-04-15 04:27:13,832 INFO L226 Difference]: Without dead ends: 963 [2021-04-15 04:27:13,832 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 181.3ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-04-15 04:27:13,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-04-15 04:27:13,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 612. [2021-04-15 04:27:13,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 4.718494271685761) internal successors, (2883), 611 states have internal predecessors, (2883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:13,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 2883 transitions. [2021-04-15 04:27:13,853 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 2883 transitions. Word has length 21 [2021-04-15 04:27:13,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:13,853 INFO L480 AbstractCegarLoop]: Abstraction has 612 states and 2883 transitions. [2021-04-15 04:27:13,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:13,853 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 2883 transitions. [2021-04-15 04:27:13,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 04:27:13,856 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:13,856 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:14,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-04-15 04:27:14,073 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:14,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:14,073 INFO L82 PathProgramCache]: Analyzing trace with hash -818897626, now seen corresponding path program 6 times [2021-04-15 04:27:14,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:14,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701310208] [2021-04-15 04:27:14,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:14,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:14,211 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:14,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701310208] [2021-04-15 04:27:14,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536075446] [2021-04-15 04:27:14,211 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:14,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 04:27:14,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:14,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 04:27:14,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:14,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-04-15 04:27:14,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:14,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:14,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:14,382 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:22 [2021-04-15 04:27:14,411 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:14,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:14,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-04-15 04:27:14,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587024035] [2021-04-15 04:27:14,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 04:27:14,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:14,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 04:27:14,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-04-15 04:27:14,413 INFO L87 Difference]: Start difference. First operand 612 states and 2883 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:14,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:14,530 INFO L93 Difference]: Finished difference Result 752 states and 3292 transitions. [2021-04-15 04:27:14,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 04:27:14,530 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 [2021-04-15 04:27:14,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:14,535 INFO L225 Difference]: With dead ends: 752 [2021-04-15 04:27:14,535 INFO L226 Difference]: Without dead ends: 747 [2021-04-15 04:27:14,535 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 234.1ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-04-15 04:27:14,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2021-04-15 04:27:14,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 612. [2021-04-15 04:27:14,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 4.723404255319149) internal successors, (2886), 611 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:14,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 2886 transitions. [2021-04-15 04:27:14,554 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 2886 transitions. Word has length 21 [2021-04-15 04:27:14,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:14,554 INFO L480 AbstractCegarLoop]: Abstraction has 612 states and 2886 transitions. [2021-04-15 04:27:14,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:14,555 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 2886 transitions. [2021-04-15 04:27:14,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 04:27:14,557 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:14,557 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:14,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-04-15 04:27:14,774 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:14,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:14,774 INFO L82 PathProgramCache]: Analyzing trace with hash -278148342, now seen corresponding path program 7 times [2021-04-15 04:27:14,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:14,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276188572] [2021-04-15 04:27:14,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:14,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:14,863 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:14,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276188572] [2021-04-15 04:27:14,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322216377] [2021-04-15 04:27:14,863 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:14,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:14,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 04:27:14,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:15,115 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:15,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:15,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 04:27:15,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993753594] [2021-04-15 04:27:15,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 04:27:15,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:15,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 04:27:15,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-04-15 04:27:15,117 INFO L87 Difference]: Start difference. First operand 612 states and 2886 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:15,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:15,230 INFO L93 Difference]: Finished difference Result 691 states and 3130 transitions. [2021-04-15 04:27:15,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 04:27:15,230 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 04:27:15,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:15,234 INFO L225 Difference]: With dead ends: 691 [2021-04-15 04:27:15,234 INFO L226 Difference]: Without dead ends: 686 [2021-04-15 04:27:15,235 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 247.5ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-04-15 04:27:15,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-04-15 04:27:15,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 618. [2021-04-15 04:27:15,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 617 states have (on average 4.72771474878444) internal successors, (2917), 617 states have internal predecessors, (2917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:15,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 2917 transitions. [2021-04-15 04:27:15,253 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 2917 transitions. Word has length 21 [2021-04-15 04:27:15,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:15,253 INFO L480 AbstractCegarLoop]: Abstraction has 618 states and 2917 transitions. [2021-04-15 04:27:15,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:15,254 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 2917 transitions. [2021-04-15 04:27:15,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 04:27:15,255 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:15,255 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:15,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-04-15 04:27:15,472 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:15,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:15,472 INFO L82 PathProgramCache]: Analyzing trace with hash -781165444, now seen corresponding path program 1 times [2021-04-15 04:27:15,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:15,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412827109] [2021-04-15 04:27:15,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:15,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:15,511 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:27:15,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412827109] [2021-04-15 04:27:15,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459129681] [2021-04-15 04:27:15,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:15,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:15,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 04:27:15,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:15,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:27:15,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:15,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-04-15 04:27:15,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300755863] [2021-04-15 04:27:15,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 04:27:15,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:15,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 04:27:15,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-04-15 04:27:15,843 INFO L87 Difference]: Start difference. First operand 618 states and 2917 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:15,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:15,896 INFO L93 Difference]: Finished difference Result 608 states and 2803 transitions. [2021-04-15 04:27:15,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 04:27:15,896 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 04:27:15,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:15,900 INFO L225 Difference]: With dead ends: 608 [2021-04-15 04:27:15,900 INFO L226 Difference]: Without dead ends: 584 [2021-04-15 04:27:15,900 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 193.1ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-04-15 04:27:15,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-04-15 04:27:15,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 582. [2021-04-15 04:27:15,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 4.729776247848537) internal successors, (2748), 581 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:15,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 2748 transitions. [2021-04-15 04:27:15,918 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 2748 transitions. Word has length 21 [2021-04-15 04:27:15,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:15,919 INFO L480 AbstractCegarLoop]: Abstraction has 582 states and 2748 transitions. [2021-04-15 04:27:15,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:15,919 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 2748 transitions. [2021-04-15 04:27:15,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 04:27:15,921 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:15,921 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:16,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-04-15 04:27:16,137 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:16,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:16,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1522007757, now seen corresponding path program 4 times [2021-04-15 04:27:16,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:16,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003734402] [2021-04-15 04:27:16,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:16,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:16,246 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:16,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003734402] [2021-04-15 04:27:16,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356232838] [2021-04-15 04:27:16,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:16,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:27:16,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:16,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 04:27:16,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:16,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-04-15 04:27:16,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:16,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-04-15 04:27:16,383 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:16,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:16,406 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. [2021-04-15 04:27:16,406 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:75, output treesize:61 [2021-04-15 04:27:16,560 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:16,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:16,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-04-15 04:27:16,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320086486] [2021-04-15 04:27:16,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 04:27:16,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:16,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 04:27:16,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-04-15 04:27:16,562 INFO L87 Difference]: Start difference. First operand 582 states and 2748 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:16,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:16,827 INFO L93 Difference]: Finished difference Result 1630 states and 7471 transitions. [2021-04-15 04:27:16,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 04:27:16,828 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 04:27:16,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:16,837 INFO L225 Difference]: With dead ends: 1630 [2021-04-15 04:27:16,837 INFO L226 Difference]: Without dead ends: 1588 [2021-04-15 04:27:16,838 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 358.2ms TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-04-15 04:27:16,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2021-04-15 04:27:16,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 1108. [2021-04-15 04:27:16,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 1107 states have (on average 5.061427280939476) internal successors, (5603), 1107 states have internal predecessors, (5603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:16,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 5603 transitions. [2021-04-15 04:27:16,874 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 5603 transitions. Word has length 22 [2021-04-15 04:27:16,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:16,874 INFO L480 AbstractCegarLoop]: Abstraction has 1108 states and 5603 transitions. [2021-04-15 04:27:16,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:16,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 5603 transitions. [2021-04-15 04:27:16,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 04:27:16,877 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:16,877 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:17,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-04-15 04:27:17,093 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:17,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:17,093 INFO L82 PathProgramCache]: Analyzing trace with hash -488176887, now seen corresponding path program 5 times [2021-04-15 04:27:17,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:17,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111521970] [2021-04-15 04:27:17,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:17,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:17,245 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:17,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111521970] [2021-04-15 04:27:17,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717066850] [2021-04-15 04:27:17,246 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 04:27:17,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 04:27:17,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:17,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 04:27:17,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:17,497 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:17,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:17,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 04:27:17,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481449759] [2021-04-15 04:27:17,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 04:27:17,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:17,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 04:27:17,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-04-15 04:27:17,498 INFO L87 Difference]: Start difference. First operand 1108 states and 5603 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:17,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:17,606 INFO L93 Difference]: Finished difference Result 1227 states and 5978 transitions. [2021-04-15 04:27:17,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 04:27:17,606 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 [2021-04-15 04:27:17,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:17,613 INFO L225 Difference]: With dead ends: 1227 [2021-04-15 04:27:17,613 INFO L226 Difference]: Without dead ends: 1222 [2021-04-15 04:27:17,613 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 240.8ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-04-15 04:27:17,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2021-04-15 04:27:17,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 1133. [2021-04-15 04:27:17,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 1132 states have (on average 5.0521201413427566) internal successors, (5719), 1132 states have internal predecessors, (5719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:17,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 5719 transitions. [2021-04-15 04:27:17,654 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 5719 transitions. Word has length 22 [2021-04-15 04:27:17,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:17,654 INFO L480 AbstractCegarLoop]: Abstraction has 1133 states and 5719 transitions. [2021-04-15 04:27:17,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:17,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 5719 transitions. [2021-04-15 04:27:17,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 04:27:17,661 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:17,661 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:17,871 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:17,871 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:17,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:17,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1712214825, now seen corresponding path program 8 times [2021-04-15 04:27:17,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:17,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967859287] [2021-04-15 04:27:17,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:17,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:17,991 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:17,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967859287] [2021-04-15 04:27:17,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263081634] [2021-04-15 04:27:17,992 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 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 [2021-04-15 04:27:18,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:27:18,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:18,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 04:27:18,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:18,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-04-15 04:27:18,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:18,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-04-15 04:27:18,150 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:18,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:18,176 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. [2021-04-15 04:27:18,176 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:89, output treesize:75 [2021-04-15 04:27:18,354 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:18,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:18,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 04:27:18,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837837416] [2021-04-15 04:27:18,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 04:27:18,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:18,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 04:27:18,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-04-15 04:27:18,356 INFO L87 Difference]: Start difference. First operand 1133 states and 5719 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:18,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:18,730 INFO L93 Difference]: Finished difference Result 2178 states and 10194 transitions. [2021-04-15 04:27:18,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 04:27:18,731 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 [2021-04-15 04:27:18,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:18,743 INFO L225 Difference]: With dead ends: 2178 [2021-04-15 04:27:18,743 INFO L226 Difference]: Without dead ends: 2134 [2021-04-15 04:27:18,744 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 504.7ms TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-04-15 04:27:18,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2134 states. [2021-04-15 04:27:18,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2134 to 1129. [2021-04-15 04:27:18,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1129 states, 1128 states have (on average 5.01595744680851) internal successors, (5658), 1128 states have internal predecessors, (5658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:18,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1129 states to 1129 states and 5658 transitions. [2021-04-15 04:27:18,784 INFO L78 Accepts]: Start accepts. Automaton has 1129 states and 5658 transitions. Word has length 22 [2021-04-15 04:27:18,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:18,785 INFO L480 AbstractCegarLoop]: Abstraction has 1129 states and 5658 transitions. [2021-04-15 04:27:18,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:18,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1129 states and 5658 transitions. [2021-04-15 04:27:18,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 04:27:18,821 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:18,821 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:19,022 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-04-15 04:27:19,022 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:19,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:19,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1851398567, now seen corresponding path program 9 times [2021-04-15 04:27:19,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:19,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894638997] [2021-04-15 04:27:19,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:19,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:19,108 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:19,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894638997] [2021-04-15 04:27:19,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778188914] [2021-04-15 04:27:19,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:19,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 04:27:19,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:19,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 04:27:19,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:19,289 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:27:19,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:19,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2021-04-15 04:27:19,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445737013] [2021-04-15 04:27:19,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 04:27:19,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:19,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 04:27:19,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-04-15 04:27:19,291 INFO L87 Difference]: Start difference. First operand 1129 states and 5658 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:19,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:19,414 INFO L93 Difference]: Finished difference Result 1249 states and 6050 transitions. [2021-04-15 04:27:19,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 04:27:19,415 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 [2021-04-15 04:27:19,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:19,419 INFO L225 Difference]: With dead ends: 1249 [2021-04-15 04:27:19,419 INFO L226 Difference]: Without dead ends: 1233 [2021-04-15 04:27:19,420 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 209.8ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-04-15 04:27:19,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-04-15 04:27:19,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 1137. [2021-04-15 04:27:19,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 5.007922535211268) internal successors, (5689), 1136 states have internal predecessors, (5689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:19,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 5689 transitions. [2021-04-15 04:27:19,444 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 5689 transitions. Word has length 22 [2021-04-15 04:27:19,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:19,445 INFO L480 AbstractCegarLoop]: Abstraction has 1137 states and 5689 transitions. [2021-04-15 04:27:19,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:19,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 5689 transitions. [2021-04-15 04:27:19,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 04:27:19,448 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:19,448 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:19,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:19,660 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:19,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:19,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1902819445, now seen corresponding path program 10 times [2021-04-15 04:27:19,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:19,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031199892] [2021-04-15 04:27:19,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:19,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:19,760 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:19,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031199892] [2021-04-15 04:27:19,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623287537] [2021-04-15 04:27:19,760 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 [2021-04-15 04:27:19,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:27:19,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:19,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 04:27:19,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:19,966 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:19,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:19,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 04:27:19,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036473333] [2021-04-15 04:27:19,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 04:27:19,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:19,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 04:27:19,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-04-15 04:27:19,967 INFO L87 Difference]: Start difference. First operand 1137 states and 5689 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:20,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:20,186 INFO L93 Difference]: Finished difference Result 1205 states and 5916 transitions. [2021-04-15 04:27:20,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 04:27:20,186 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 [2021-04-15 04:27:20,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:20,191 INFO L225 Difference]: With dead ends: 1205 [2021-04-15 04:27:20,191 INFO L226 Difference]: Without dead ends: 1200 [2021-04-15 04:27:20,191 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 293.4ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-04-15 04:27:20,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-04-15 04:27:20,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 1142. [2021-04-15 04:27:20,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 5.010517090271692) internal successors, (5717), 1141 states have internal predecessors, (5717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:20,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 5717 transitions. [2021-04-15 04:27:20,215 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 5717 transitions. Word has length 22 [2021-04-15 04:27:20,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:20,216 INFO L480 AbstractCegarLoop]: Abstraction has 1142 states and 5717 transitions. [2021-04-15 04:27:20,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:20,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 5717 transitions. [2021-04-15 04:27:20,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 04:27:20,219 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:20,219 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:20,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-04-15 04:27:20,437 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:20,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:20,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1681233933, now seen corresponding path program 11 times [2021-04-15 04:27:20,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:20,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596829616] [2021-04-15 04:27:20,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:20,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:20,584 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:20,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596829616] [2021-04-15 04:27:20,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080381960] [2021-04-15 04:27:20,584 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 [2021-04-15 04:27:20,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 04:27:20,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:20,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 04:27:20,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:20,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-04-15 04:27:20,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:20,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:20,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:20,796 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-04-15 04:27:20,852 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:20,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:20,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 04:27:20,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971736916] [2021-04-15 04:27:20,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 04:27:20,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:20,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 04:27:20,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-04-15 04:27:20,853 INFO L87 Difference]: Start difference. First operand 1142 states and 5717 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:21,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:21,061 INFO L93 Difference]: Finished difference Result 1743 states and 8198 transitions. [2021-04-15 04:27:21,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 04:27:21,061 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 [2021-04-15 04:27:21,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:21,067 INFO L225 Difference]: With dead ends: 1743 [2021-04-15 04:27:21,068 INFO L226 Difference]: Without dead ends: 1729 [2021-04-15 04:27:21,068 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 366.5ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-04-15 04:27:21,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2021-04-15 04:27:21,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1199. [2021-04-15 04:27:21,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 1198 states have (on average 5.064273789649416) internal successors, (6067), 1198 states have internal predecessors, (6067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:21,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 6067 transitions. [2021-04-15 04:27:21,101 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 6067 transitions. Word has length 22 [2021-04-15 04:27:21,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:21,102 INFO L480 AbstractCegarLoop]: Abstraction has 1199 states and 6067 transitions. [2021-04-15 04:27:21,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:21,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 6067 transitions. [2021-04-15 04:27:21,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 04:27:21,107 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:21,107 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:21,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-04-15 04:27:21,322 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:21,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:21,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1253616623, now seen corresponding path program 12 times [2021-04-15 04:27:21,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:21,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450741604] [2021-04-15 04:27:21,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:21,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:21,415 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:21,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450741604] [2021-04-15 04:27:21,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583903849] [2021-04-15 04:27:21,416 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 [2021-04-15 04:27:21,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 04:27:21,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:21,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 04:27:21,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:21,583 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 [2021-04-15 04:27:21,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:21,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-04-15 04:27:21,588 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:21,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:21,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:27:21,615 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:91, output treesize:77 [2021-04-15 04:27:21,691 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:27:21,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:21,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2021-04-15 04:27:21,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630648020] [2021-04-15 04:27:21,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 04:27:21,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:21,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 04:27:21,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-04-15 04:27:21,692 INFO L87 Difference]: Start difference. First operand 1199 states and 6067 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:22,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:22,100 INFO L93 Difference]: Finished difference Result 1573 states and 7555 transitions. [2021-04-15 04:27:22,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 04:27:22,100 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 [2021-04-15 04:27:22,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:22,105 INFO L225 Difference]: With dead ends: 1573 [2021-04-15 04:27:22,106 INFO L226 Difference]: Without dead ends: 1553 [2021-04-15 04:27:22,106 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 498.2ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-04-15 04:27:22,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1553 states. [2021-04-15 04:27:22,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1553 to 1261. [2021-04-15 04:27:22,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1260 states have (on average 5.0738095238095235) internal successors, (6393), 1260 states have internal predecessors, (6393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:22,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 6393 transitions. [2021-04-15 04:27:22,140 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 6393 transitions. Word has length 22 [2021-04-15 04:27:22,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:22,140 INFO L480 AbstractCegarLoop]: Abstraction has 1261 states and 6393 transitions. [2021-04-15 04:27:22,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:22,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 6393 transitions. [2021-04-15 04:27:22,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 04:27:22,144 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:22,144 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:22,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-04-15 04:27:22,360 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:22,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:22,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1547176399, now seen corresponding path program 13 times [2021-04-15 04:27:22,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:22,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448220857] [2021-04-15 04:27:22,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:22,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:22,526 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:22,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448220857] [2021-04-15 04:27:22,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736568351] [2021-04-15 04:27:22,526 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 [2021-04-15 04:27:22,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:22,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 04:27:22,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:22,764 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:22,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:22,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 04:27:22,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830331197] [2021-04-15 04:27:22,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 04:27:22,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:22,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 04:27:22,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-04-15 04:27:22,765 INFO L87 Difference]: Start difference. First operand 1261 states and 6393 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:22,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:22,924 INFO L93 Difference]: Finished difference Result 1457 states and 6995 transitions. [2021-04-15 04:27:22,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 04:27:22,925 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 [2021-04-15 04:27:22,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:22,930 INFO L225 Difference]: With dead ends: 1457 [2021-04-15 04:27:22,930 INFO L226 Difference]: Without dead ends: 1450 [2021-04-15 04:27:22,930 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 252.4ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-04-15 04:27:22,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1450 states. [2021-04-15 04:27:22,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1450 to 1238. [2021-04-15 04:27:22,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 5.019401778496362) internal successors, (6209), 1237 states have internal predecessors, (6209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:22,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 6209 transitions. [2021-04-15 04:27:22,958 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 6209 transitions. Word has length 22 [2021-04-15 04:27:22,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:22,959 INFO L480 AbstractCegarLoop]: Abstraction has 1238 states and 6209 transitions. [2021-04-15 04:27:22,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:22,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 6209 transitions. [2021-04-15 04:27:22,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 04:27:22,961 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:22,962 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:23,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:23,177 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:23,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:23,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1264592553, now seen corresponding path program 14 times [2021-04-15 04:27:23,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:23,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912655071] [2021-04-15 04:27:23,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:23,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:23,254 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:23,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912655071] [2021-04-15 04:27:23,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808605048] [2021-04-15 04:27:23,254 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 [2021-04-15 04:27:23,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:27:23,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:23,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 04:27:23,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:23,466 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 [2021-04-15 04:27:23,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:23,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:23,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:23,477 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:34 [2021-04-15 04:27:23,507 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:23,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:23,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-04-15 04:27:23,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951229057] [2021-04-15 04:27:23,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 04:27:23,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:23,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 04:27:23,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-04-15 04:27:23,509 INFO L87 Difference]: Start difference. First operand 1238 states and 6209 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:23,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:23,698 INFO L93 Difference]: Finished difference Result 1354 states and 6446 transitions. [2021-04-15 04:27:23,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 04:27:23,698 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 [2021-04-15 04:27:23,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:23,703 INFO L225 Difference]: With dead ends: 1354 [2021-04-15 04:27:23,703 INFO L226 Difference]: Without dead ends: 1342 [2021-04-15 04:27:23,705 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 304.0ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-04-15 04:27:23,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2021-04-15 04:27:23,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1179. [2021-04-15 04:27:23,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 1178 states have (on average 4.953310696095077) internal successors, (5835), 1178 states have internal predecessors, (5835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:23,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 5835 transitions. [2021-04-15 04:27:23,733 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 5835 transitions. Word has length 22 [2021-04-15 04:27:23,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:23,733 INFO L480 AbstractCegarLoop]: Abstraction has 1179 states and 5835 transitions. [2021-04-15 04:27:23,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:23,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 5835 transitions. [2021-04-15 04:27:23,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 04:27:23,737 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:23,737 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:23,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-04-15 04:27:23,953 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:23,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:23,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1104277259, now seen corresponding path program 15 times [2021-04-15 04:27:23,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:23,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626786180] [2021-04-15 04:27:23,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:23,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:24,052 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:24,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626786180] [2021-04-15 04:27:24,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438179374] [2021-04-15 04:27:24,053 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 [2021-04-15 04:27:24,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 04:27:24,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:24,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 04:27:24,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:24,266 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:24,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:24,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 04:27:24,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652508274] [2021-04-15 04:27:24,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 04:27:24,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:24,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 04:27:24,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-04-15 04:27:24,268 INFO L87 Difference]: Start difference. First operand 1179 states and 5835 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:24,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:24,424 INFO L93 Difference]: Finished difference Result 1232 states and 6006 transitions. [2021-04-15 04:27:24,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 04:27:24,425 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 [2021-04-15 04:27:24,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:24,429 INFO L225 Difference]: With dead ends: 1232 [2021-04-15 04:27:24,429 INFO L226 Difference]: Without dead ends: 1227 [2021-04-15 04:27:24,430 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 246.4ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-04-15 04:27:24,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2021-04-15 04:27:24,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1184. [2021-04-15 04:27:24,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 4.945900253592561) internal successors, (5851), 1183 states have internal predecessors, (5851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:24,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 5851 transitions. [2021-04-15 04:27:24,456 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 5851 transitions. Word has length 22 [2021-04-15 04:27:24,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:24,456 INFO L480 AbstractCegarLoop]: Abstraction has 1184 states and 5851 transitions. [2021-04-15 04:27:24,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:24,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 5851 transitions. [2021-04-15 04:27:24,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 04:27:24,459 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:24,459 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:24,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:24,673 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:24,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:24,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1885658193, now seen corresponding path program 2 times [2021-04-15 04:27:24,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:24,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895679793] [2021-04-15 04:27:24,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:24,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:24,784 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:24,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895679793] [2021-04-15 04:27:24,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440150799] [2021-04-15 04:27:24,785 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 [2021-04-15 04:27:24,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:27:24,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:24,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 04:27:24,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:25,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-04-15 04:27:25,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:25,233 INFO L628 ElimStorePlain]: treesize reduction 7, result has 90.1 percent of original size [2021-04-15 04:27:25,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-04-15 04:27:25,237 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:25,254 INFO L628 ElimStorePlain]: treesize reduction 33, result has 42.1 percent of original size [2021-04-15 04:27:25,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:25,255 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:78, output treesize:24 [2021-04-15 04:27:25,313 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:25,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:25,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 04:27:25,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990368714] [2021-04-15 04:27:25,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 04:27:25,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:25,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 04:27:25,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-04-15 04:27:25,314 INFO L87 Difference]: Start difference. First operand 1184 states and 5851 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:25,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:25,642 INFO L93 Difference]: Finished difference Result 1635 states and 7595 transitions. [2021-04-15 04:27:25,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 04:27:25,642 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 [2021-04-15 04:27:25,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:25,648 INFO L225 Difference]: With dead ends: 1635 [2021-04-15 04:27:25,648 INFO L226 Difference]: Without dead ends: 1616 [2021-04-15 04:27:25,648 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 526.6ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-04-15 04:27:25,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2021-04-15 04:27:25,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1233. [2021-04-15 04:27:25,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1232 states have (on average 4.982954545454546) internal successors, (6139), 1232 states have internal predecessors, (6139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:25,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 6139 transitions. [2021-04-15 04:27:25,676 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 6139 transitions. Word has length 22 [2021-04-15 04:27:25,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:25,676 INFO L480 AbstractCegarLoop]: Abstraction has 1233 states and 6139 transitions. [2021-04-15 04:27:25,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:25,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 6139 transitions. [2021-04-15 04:27:25,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 04:27:25,679 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:25,679 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:25,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-04-15 04:27:25,893 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:25,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:25,893 INFO L82 PathProgramCache]: Analyzing trace with hash -671870473, now seen corresponding path program 3 times [2021-04-15 04:27:25,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:25,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819769311] [2021-04-15 04:27:25,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:25,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:25,960 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:27:25,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819769311] [2021-04-15 04:27:25,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926910847] [2021-04-15 04:27:25,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 04:27:25,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 04:27:25,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:25,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 04:27:25,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:26,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-04-15 04:27:26,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:26,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:26,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:26,096 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:10 [2021-04-15 04:27:26,122 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:27:26,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:26,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-04-15 04:27:26,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059143611] [2021-04-15 04:27:26,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 04:27:26,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:26,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 04:27:26,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-04-15 04:27:26,123 INFO L87 Difference]: Start difference. First operand 1233 states and 6139 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:26,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:26,305 INFO L93 Difference]: Finished difference Result 1856 states and 8646 transitions. [2021-04-15 04:27:26,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 04:27:26,306 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 [2021-04-15 04:27:26,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:26,313 INFO L225 Difference]: With dead ends: 1856 [2021-04-15 04:27:26,313 INFO L226 Difference]: Without dead ends: 1832 [2021-04-15 04:27:26,314 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 169.4ms TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-04-15 04:27:26,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2021-04-15 04:27:26,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1293. [2021-04-15 04:27:26,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1293 states, 1292 states have (on average 5.05030959752322) internal successors, (6525), 1292 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:26,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 6525 transitions. [2021-04-15 04:27:26,344 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 6525 transitions. Word has length 22 [2021-04-15 04:27:26,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:26,344 INFO L480 AbstractCegarLoop]: Abstraction has 1293 states and 6525 transitions. [2021-04-15 04:27:26,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:26,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 6525 transitions. [2021-04-15 04:27:26,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 04:27:26,347 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:26,347 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:26,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-04-15 04:27:26,563 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:26,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:26,564 INFO L82 PathProgramCache]: Analyzing trace with hash 965997621, now seen corresponding path program 4 times [2021-04-15 04:27:26,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:26,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013555902] [2021-04-15 04:27:26,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:26,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:26,675 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:26,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013555902] [2021-04-15 04:27:26,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444166897] [2021-04-15 04:27:26,675 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 [2021-04-15 04:27:26,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:27:26,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:26,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 04:27:26,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:27,039 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:27,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:27,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 04:27:27,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083825830] [2021-04-15 04:27:27,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 04:27:27,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:27,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 04:27:27,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-04-15 04:27:27,049 INFO L87 Difference]: Start difference. First operand 1293 states and 6525 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:27,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:27,147 INFO L93 Difference]: Finished difference Result 1304 states and 6549 transitions. [2021-04-15 04:27:27,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 04:27:27,147 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 [2021-04-15 04:27:27,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:27,151 INFO L225 Difference]: With dead ends: 1304 [2021-04-15 04:27:27,151 INFO L226 Difference]: Without dead ends: 1302 [2021-04-15 04:27:27,151 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 352.6ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-04-15 04:27:27,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2021-04-15 04:27:27,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1298. [2021-04-15 04:27:27,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1297 states have (on average 5.036237471087124) internal successors, (6532), 1297 states have internal predecessors, (6532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:27,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 6532 transitions. [2021-04-15 04:27:27,177 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 6532 transitions. Word has length 22 [2021-04-15 04:27:27,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:27,177 INFO L480 AbstractCegarLoop]: Abstraction has 1298 states and 6532 transitions. [2021-04-15 04:27:27,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:27,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 6532 transitions. [2021-04-15 04:27:27,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 04:27:27,181 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:27,181 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:27,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-04-15 04:27:27,397 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:27,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:27,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1818617425, now seen corresponding path program 5 times [2021-04-15 04:27:27,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:27,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922338386] [2021-04-15 04:27:27,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:27,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:27,542 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:27,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922338386] [2021-04-15 04:27:27,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879309751] [2021-04-15 04:27:27,543 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 [2021-04-15 04:27:27,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 04:27:27,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:27,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 04:27:27,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:29,081 WARN L205 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-04-15 04:27:29,105 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:29,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:29,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-04-15 04:27:29,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547511908] [2021-04-15 04:27:29,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 04:27:29,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:29,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 04:27:29,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-04-15 04:27:29,107 INFO L87 Difference]: Start difference. First operand 1298 states and 6532 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:29,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:29,464 INFO L93 Difference]: Finished difference Result 1307 states and 6549 transitions. [2021-04-15 04:27:29,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 04:27:29,465 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 [2021-04-15 04:27:29,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:29,469 INFO L225 Difference]: With dead ends: 1307 [2021-04-15 04:27:29,469 INFO L226 Difference]: Without dead ends: 1305 [2021-04-15 04:27:29,469 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1845.5ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-04-15 04:27:29,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1305 states. [2021-04-15 04:27:29,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1305 to 1296. [2021-04-15 04:27:29,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 1295 states have (on average 5.0355212355212355) internal successors, (6521), 1295 states have internal predecessors, (6521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:29,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 6521 transitions. [2021-04-15 04:27:29,494 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 6521 transitions. Word has length 22 [2021-04-15 04:27:29,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:29,494 INFO L480 AbstractCegarLoop]: Abstraction has 1296 states and 6521 transitions. [2021-04-15 04:27:29,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:29,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 6521 transitions. [2021-04-15 04:27:29,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 04:27:29,498 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:29,498 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:29,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-04-15 04:27:29,713 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:29,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:29,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1448901451, now seen corresponding path program 6 times [2021-04-15 04:27:29,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:29,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525319370] [2021-04-15 04:27:29,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:29,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:29,877 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:29,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525319370] [2021-04-15 04:27:29,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887766268] [2021-04-15 04:27:29,877 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 [2021-04-15 04:27:29,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 04:27:29,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:29,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 04:27:29,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:30,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-04-15 04:27:30,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:30,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:30,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:30,100 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:24 [2021-04-15 04:27:30,132 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:30,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:30,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 04:27:30,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081131824] [2021-04-15 04:27:30,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 04:27:30,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:30,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 04:27:30,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-04-15 04:27:30,133 INFO L87 Difference]: Start difference. First operand 1296 states and 6521 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:30,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:30,458 INFO L93 Difference]: Finished difference Result 1343 states and 6669 transitions. [2021-04-15 04:27:30,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 04:27:30,458 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 [2021-04-15 04:27:30,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:30,461 INFO L225 Difference]: With dead ends: 1343 [2021-04-15 04:27:30,461 INFO L226 Difference]: Without dead ends: 1334 [2021-04-15 04:27:30,462 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 451.4ms TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-04-15 04:27:30,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2021-04-15 04:27:30,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 1297. [2021-04-15 04:27:30,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 5.042438271604938) internal successors, (6535), 1296 states have internal predecessors, (6535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:30,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 6535 transitions. [2021-04-15 04:27:30,484 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 6535 transitions. Word has length 22 [2021-04-15 04:27:30,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:30,484 INFO L480 AbstractCegarLoop]: Abstraction has 1297 states and 6535 transitions. [2021-04-15 04:27:30,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:30,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 6535 transitions. [2021-04-15 04:27:30,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 04:27:30,487 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:30,487 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:30,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:30,703 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:30,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:30,703 INFO L82 PathProgramCache]: Analyzing trace with hash 541686385, now seen corresponding path program 7 times [2021-04-15 04:27:30,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:30,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777775694] [2021-04-15 04:27:30,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:30,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:30,792 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:30,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777775694] [2021-04-15 04:27:30,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643926383] [2021-04-15 04:27:30,793 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 [2021-04-15 04:27:30,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:30,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 04:27:30,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:31,229 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:31,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:31,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 04:27:31,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532561845] [2021-04-15 04:27:31,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 04:27:31,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:31,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 04:27:31,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-04-15 04:27:31,231 INFO L87 Difference]: Start difference. First operand 1297 states and 6535 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:31,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:31,462 INFO L93 Difference]: Finished difference Result 1313 states and 6570 transitions. [2021-04-15 04:27:31,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 04:27:31,462 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 [2021-04-15 04:27:31,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:31,465 INFO L225 Difference]: With dead ends: 1313 [2021-04-15 04:27:31,465 INFO L226 Difference]: Without dead ends: 1312 [2021-04-15 04:27:31,466 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 476.7ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-04-15 04:27:31,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2021-04-15 04:27:31,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 1299. [2021-04-15 04:27:31,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 5.037750385208012) internal successors, (6539), 1298 states have internal predecessors, (6539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:31,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 6539 transitions. [2021-04-15 04:27:31,522 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 6539 transitions. Word has length 22 [2021-04-15 04:27:31,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:31,522 INFO L480 AbstractCegarLoop]: Abstraction has 1299 states and 6539 transitions. [2021-04-15 04:27:31,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:31,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 6539 transitions. [2021-04-15 04:27:31,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 04:27:31,525 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:31,526 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:31,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-04-15 04:27:31,733 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:31,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:31,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1751157336, now seen corresponding path program 6 times [2021-04-15 04:27:31,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:31,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355595607] [2021-04-15 04:27:31,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:31,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:31,805 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:31,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355595607] [2021-04-15 04:27:31,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669815618] [2021-04-15 04:27:31,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:31,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 04:27:31,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:31,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 04:27:31,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:32,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-04-15 04:27:32,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:32,084 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 04:27:32,085 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:32,108 INFO L628 ElimStorePlain]: treesize reduction 7, result has 85.7 percent of original size [2021-04-15 04:27:32,109 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. [2021-04-15 04:27:32,109 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:115, output treesize:42 [2021-04-15 04:27:32,171 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:32,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:32,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-04-15 04:27:32,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603760924] [2021-04-15 04:27:32,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 04:27:32,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:32,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 04:27:32,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-04-15 04:27:32,172 INFO L87 Difference]: Start difference. First operand 1299 states and 6539 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:32,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:32,359 INFO L93 Difference]: Finished difference Result 2334 states and 10656 transitions. [2021-04-15 04:27:32,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 04:27:32,360 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 04:27:32,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:32,365 INFO L225 Difference]: With dead ends: 2334 [2021-04-15 04:27:32,365 INFO L226 Difference]: Without dead ends: 2313 [2021-04-15 04:27:32,365 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 312.7ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-04-15 04:27:32,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2021-04-15 04:27:32,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 1344. [2021-04-15 04:27:32,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1343 states have (on average 5.061801935964259) internal successors, (6798), 1343 states have internal predecessors, (6798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:32,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 6798 transitions. [2021-04-15 04:27:32,395 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 6798 transitions. Word has length 23 [2021-04-15 04:27:32,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:32,395 INFO L480 AbstractCegarLoop]: Abstraction has 1344 states and 6798 transitions. [2021-04-15 04:27:32,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:32,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 6798 transitions. [2021-04-15 04:27:32,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 04:27:32,398 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:32,398 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:32,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-04-15 04:27:32,617 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:32,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:32,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1519096036, now seen corresponding path program 7 times [2021-04-15 04:27:32,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:32,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441505994] [2021-04-15 04:27:32,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:32,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:32,712 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:32,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441505994] [2021-04-15 04:27:32,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986844757] [2021-04-15 04:27:32,712 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:32,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:32,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 04:27:32,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:33,076 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:33,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:33,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-04-15 04:27:33,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134300244] [2021-04-15 04:27:33,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 04:27:33,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:33,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 04:27:33,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-04-15 04:27:33,078 INFO L87 Difference]: Start difference. First operand 1344 states and 6798 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:33,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:33,269 INFO L93 Difference]: Finished difference Result 1283 states and 6260 transitions. [2021-04-15 04:27:33,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 04:27:33,269 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 [2021-04-15 04:27:33,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:33,273 INFO L225 Difference]: With dead ends: 1283 [2021-04-15 04:27:33,273 INFO L226 Difference]: Without dead ends: 1274 [2021-04-15 04:27:33,273 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 392.3ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-04-15 04:27:33,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-04-15 04:27:33,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 1250. [2021-04-15 04:27:33,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 4.948759007205765) internal successors, (6181), 1249 states have internal predecessors, (6181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:33,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 6181 transitions. [2021-04-15 04:27:33,296 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 6181 transitions. Word has length 23 [2021-04-15 04:27:33,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:33,297 INFO L480 AbstractCegarLoop]: Abstraction has 1250 states and 6181 transitions. [2021-04-15 04:27:33,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:33,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 6181 transitions. [2021-04-15 04:27:33,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 04:27:33,300 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:33,300 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:33,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:33,500 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:33,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:33,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1855571384, now seen corresponding path program 16 times [2021-04-15 04:27:33,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:33,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363407978] [2021-04-15 04:27:33,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:33,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:33,575 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:33,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363407978] [2021-04-15 04:27:33,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826153089] [2021-04-15 04:27:33,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:33,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:27:33,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:33,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 04:27:33,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:33,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-04-15 04:27:33,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:33,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-04-15 04:27:33,830 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:33,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:33,862 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. [2021-04-15 04:27:33,862 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-04-15 04:27:33,969 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:33,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:33,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 04:27:33,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779063580] [2021-04-15 04:27:33,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 04:27:33,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:33,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 04:27:33,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-04-15 04:27:33,971 INFO L87 Difference]: Start difference. First operand 1250 states and 6181 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:34,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:34,050 INFO L93 Difference]: Finished difference Result 1199 states and 5228 transitions. [2021-04-15 04:27:34,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 04:27:34,050 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 [2021-04-15 04:27:34,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:34,053 INFO L225 Difference]: With dead ends: 1199 [2021-04-15 04:27:34,053 INFO L226 Difference]: Without dead ends: 1193 [2021-04-15 04:27:34,053 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 258.6ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-04-15 04:27:34,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2021-04-15 04:27:34,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 972. [2021-04-15 04:27:34,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 4.668383110195674) internal successors, (4533), 971 states have internal predecessors, (4533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:34,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 4533 transitions. [2021-04-15 04:27:34,072 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 4533 transitions. Word has length 23 [2021-04-15 04:27:34,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:34,072 INFO L480 AbstractCegarLoop]: Abstraction has 972 states and 4533 transitions. [2021-04-15 04:27:34,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:34,072 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 4533 transitions. [2021-04-15 04:27:34,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 04:27:34,074 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:34,074 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:34,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:34,279 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:34,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:34,279 INFO L82 PathProgramCache]: Analyzing trace with hash -2015886678, now seen corresponding path program 17 times [2021-04-15 04:27:34,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:34,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754750330] [2021-04-15 04:27:34,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:34,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:34,374 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:34,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754750330] [2021-04-15 04:27:34,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251727717] [2021-04-15 04:27:34,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:34,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 04:27:34,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:34,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 04:27:34,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:34,703 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:34,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:34,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-04-15 04:27:34,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650086221] [2021-04-15 04:27:34,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 04:27:34,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:34,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 04:27:34,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-04-15 04:27:34,705 INFO L87 Difference]: Start difference. First operand 972 states and 4533 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:34,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:34,780 INFO L93 Difference]: Finished difference Result 983 states and 4449 transitions. [2021-04-15 04:27:34,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 04:27:34,781 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 [2021-04-15 04:27:34,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:34,783 INFO L225 Difference]: With dead ends: 983 [2021-04-15 04:27:34,783 INFO L226 Difference]: Without dead ends: 977 [2021-04-15 04:27:34,783 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 284.8ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-04-15 04:27:34,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-04-15 04:27:34,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 949. [2021-04-15 04:27:34,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 948 states have (on average 4.60337552742616) internal successors, (4364), 948 states have internal predecessors, (4364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:34,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 4364 transitions. [2021-04-15 04:27:34,799 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 4364 transitions. Word has length 23 [2021-04-15 04:27:34,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:34,801 INFO L480 AbstractCegarLoop]: Abstraction has 949 states and 4364 transitions. [2021-04-15 04:27:34,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:34,801 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 4364 transitions. [2021-04-15 04:27:34,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 04:27:34,803 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:34,803 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:35,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:35,017 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:35,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:35,018 INFO L82 PathProgramCache]: Analyzing trace with hash 2015084676, now seen corresponding path program 18 times [2021-04-15 04:27:35,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:35,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377181850] [2021-04-15 04:27:35,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:35,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:35,085 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:35,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377181850] [2021-04-15 04:27:35,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330785731] [2021-04-15 04:27:35,085 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:35,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 04:27:35,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:27:35,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 04:27:35,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:35,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-04-15 04:27:35,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:27:35,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:27:35,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:27:35,276 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-04-15 04:27:35,302 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:35,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:35,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-04-15 04:27:35,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398100135] [2021-04-15 04:27:35,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 04:27:35,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:35,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 04:27:35,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-04-15 04:27:35,304 INFO L87 Difference]: Start difference. First operand 949 states and 4364 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:35,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:35,514 INFO L93 Difference]: Finished difference Result 1411 states and 5930 transitions. [2021-04-15 04:27:35,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 04:27:35,515 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 04:27:35,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:35,518 INFO L225 Difference]: With dead ends: 1411 [2021-04-15 04:27:35,518 INFO L226 Difference]: Without dead ends: 1405 [2021-04-15 04:27:35,518 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 229.5ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-04-15 04:27:35,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2021-04-15 04:27:35,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 947. [2021-04-15 04:27:35,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 4.619450317124736) internal successors, (4370), 946 states have internal predecessors, (4370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:35,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 4370 transitions. [2021-04-15 04:27:35,536 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 4370 transitions. Word has length 23 [2021-04-15 04:27:35,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:35,536 INFO L480 AbstractCegarLoop]: Abstraction has 947 states and 4370 transitions. [2021-04-15 04:27:35,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:35,536 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 4370 transitions. [2021-04-15 04:27:35,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 04:27:35,538 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:27:35,538 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:27:35,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-04-15 04:27:35,749 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:27:35,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:27:35,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1854769382, now seen corresponding path program 19 times [2021-04-15 04:27:35,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:27:35,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572322335] [2021-04-15 04:27:35,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:27:35,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:35,892 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:35,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572322335] [2021-04-15 04:27:35,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576704299] [2021-04-15 04:27:35,893 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:35,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:27:35,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 04:27:35,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:27:36,262 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:27:36,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:27:36,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-04-15 04:27:36,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733327157] [2021-04-15 04:27:36,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 04:27:36,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:27:36,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 04:27:36,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-04-15 04:27:36,263 INFO L87 Difference]: Start difference. First operand 947 states and 4370 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:36,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:27:36,308 INFO L93 Difference]: Finished difference Result 16 states and 21 transitions. [2021-04-15 04:27:36,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 04:27:36,308 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 [2021-04-15 04:27:36,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:27:36,308 INFO L225 Difference]: With dead ends: 16 [2021-04-15 04:27:36,308 INFO L226 Difference]: Without dead ends: 0 [2021-04-15 04:27:36,308 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 406.4ms TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-04-15 04:27:36,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-04-15 04:27:36,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-04-15 04:27:36,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:36,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-04-15 04:27:36,309 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2021-04-15 04:27:36,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:27:36,309 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-04-15 04:27:36,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:27:36,309 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-04-15 04:27:36,309 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-04-15 04:27:36,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:27:36,529 INFO L202 PluginConnector]: Adding new model commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.04 04:27:36 BasicIcfg [2021-04-15 04:27:36,529 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-15 04:27:36,529 INFO L168 Benchmark]: Toolchain (without parser) took 33904.61 ms. Allocated memory was 255.9 MB in the beginning and 889.2 MB in the end (delta: 633.3 MB). Free memory was 236.2 MB in the beginning and 785.0 MB in the end (delta: -548.8 MB). Peak memory consumption was 87.4 MB. Max. memory is 16.0 GB. [2021-04-15 04:27:36,529 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 04:27:36,530 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.50 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-04-15 04:27:36,530 INFO L168 Benchmark]: Boogie Preprocessor took 13.57 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-04-15 04:27:36,530 INFO L168 Benchmark]: RCFGBuilder took 557.44 ms. Allocated memory is still 255.9 MB. Free memory was 233.3 MB in the beginning and 209.0 MB in the end (delta: 24.3 MB). Peak memory consumption was 33.2 MB. Max. memory is 16.0 GB. [2021-04-15 04:27:36,530 INFO L168 Benchmark]: TraceAbstraction took 33304.66 ms. Allocated memory was 255.9 MB in the beginning and 889.2 MB in the end (delta: 633.3 MB). Free memory was 208.6 MB in the beginning and 785.0 MB in the end (delta: -576.4 MB). Peak memory consumption was 58.4 MB. Max. memory is 16.0 GB. [2021-04-15 04:27:36,530 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 23.50 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.57 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 557.44 ms. Allocated memory is still 255.9 MB. Free memory was 233.3 MB in the beginning and 209.0 MB in the end (delta: 24.3 MB). Peak memory consumption was 33.2 MB. Max. memory is 16.0 GB. * TraceAbstraction took 33304.66 ms. Allocated memory was 255.9 MB in the beginning and 889.2 MB in the end (delta: 633.3 MB). Free memory was 208.6 MB in the beginning and 785.0 MB in the end (delta: -576.4 MB). Peak memory consumption was 58.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 172]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 33207.4ms, OverallIterations: 45, TraceHistogramMax: 5, EmptinessCheckTime: 135.1ms, AutomataDifference: 7024.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1438 SDtfs, 2468 SDslu, 10341 SDs, 0 SdLazy, 4432 SolverSat, 365 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2329.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1253 GetRequests, 642 SyntacticMatches, 8 SemanticMatches, 603 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1514 ImplicationChecksByTransitivity, 12308.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1344occurred in iteration=40, InterpolantAutomatonStates: 403, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 931.3ms AutomataMinimizationTime, 45 MinimizatonAttempts, 7294 StatesRemovedByMinimization, 39 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 346.7ms SsaConstructionTime, 950.7ms SatisfiabilityAnalysisTime, 13604.6ms InterpolantComputationTime, 1793 NumberOfCodeBlocks, 1793 NumberOfCodeBlocksAsserted, 150 NumberOfCheckSat, 1706 ConstructedInterpolants, 58 QuantifiedInterpolants, 20088 SizeOfPredicates, 372 NumberOfNonLiveVariables, 2973 ConjunctsInSsa, 532 ConjunctsInUnsatCore, 87 InterpolantComputations, 4 PerfectInterpolantSequences, 224/890 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...