/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/parray-copy.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d47b94137d5c7dd60722882962a90fb345e61909-d47b941 [2021-05-03 16:56:17,458 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 16:56:17,459 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 16:56:17,487 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-03 16:56:17,488 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-03 16:56:17,491 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-03 16:56:17,492 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-03 16:56:17,497 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-03 16:56:17,499 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-03 16:56:17,500 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-03 16:56:17,500 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-03 16:56:17,501 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-03 16:56:17,501 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-03 16:56:17,502 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-03 16:56:17,503 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-03 16:56:17,504 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-03 16:56:17,505 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-03 16:56:17,505 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-03 16:56:17,506 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-03 16:56:17,508 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-03 16:56:17,511 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-03 16:56:17,515 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-03 16:56:17,517 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-03 16:56:17,519 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-03 16:56:17,532 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-03 16:56:17,532 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-03 16:56:17,532 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-03 16:56:17,533 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-03 16:56:17,534 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-03 16:56:17,534 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-03 16:56:17,535 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-03 16:56:17,535 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-03 16:56:17,536 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-03 16:56:17,536 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-03 16:56:17,537 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-03 16:56:17,537 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-03 16:56:17,538 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-03 16:56:17,538 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-03 16:56:17,538 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 16:56:17,539 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 16:56:17,539 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 16:56:17,548 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 [2021-05-03 16:56:17,586 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 16:56:17,586 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 16:56:17,586 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-03 16:56:17,587 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-03 16:56:17,589 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-03 16:56:17,589 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-03 16:56:17,589 INFO L138 SettingsManager]: * Use SBE=true [2021-05-03 16:56:17,590 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 16:56:17,590 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 16:56:17,590 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 16:56:17,591 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 16:56:17,591 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 16:56:17,591 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 16:56:17,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 16:56:17,591 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 16:56:17,591 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 16:56:17,591 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 16:56:17,591 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 16:56:17,591 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 16:56:17,591 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 16:56:17,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 16:56:17,592 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 16:56:17,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 16:56:17,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 16:56:17,592 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 16:56:17,592 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-03 16:56:17,592 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-03 16:56:17,592 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-03 16:56:17,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-03 16:56:17,592 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-03 16:56:17,592 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 16:56:17,593 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-03 16:56:17,859 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 16:56:17,883 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 16:56:17,885 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 16:56:17,886 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-03 16:56:17,888 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-03 16:56:17,889 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/parray-copy.wvr.bpl [2021-05-03 16:56:17,889 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/parray-copy.wvr.bpl' [2021-05-03 16:56:17,953 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 16:56:18,005 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 16:56:18,006 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-03 16:56:18,006 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-03 16:56:18,007 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-03 16:56:18,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:56:17" (1/1) ... [2021-05-03 16:56:18,025 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:56:17" (1/1) ... [2021-05-03 16:56:18,031 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-03 16:56:18,032 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 16:56:18,032 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 16:56:18,032 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 16:56:18,038 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:56:17" (1/1) ... [2021-05-03 16:56:18,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:56:17" (1/1) ... [2021-05-03 16:56:18,039 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:56:17" (1/1) ... [2021-05-03 16:56:18,040 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:56:17" (1/1) ... [2021-05-03 16:56:18,042 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:56:17" (1/1) ... [2021-05-03 16:56:18,045 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:56:17" (1/1) ... [2021-05-03 16:56:18,046 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:56:17" (1/1) ... [2021-05-03 16:56:18,047 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 16:56:18,048 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 16:56:18,048 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 16:56:18,048 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 16:56:18,053 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:56:17" (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 [2021-05-03 16:56:18,139 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-03 16:56:18,140 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-03 16:56:18,152 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-03 16:56:18,153 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-03 16:56:18,153 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-03 16:56:18,153 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-03 16:56:18,153 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-03 16:56:18,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 16:56:18,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 16:56:18,153 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-03 16:56:18,153 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-03 16:56:18,153 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-03 16:56:18,154 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-03 16:56:18,451 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 16:56:18,451 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-03 16:56:18,453 INFO L202 PluginConnector]: Adding new model parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 04:56:18 BoogieIcfgContainer [2021-05-03 16:56:18,453 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 16:56:18,454 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 16:56:18,455 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 16:56:18,457 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 16:56:18,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:56:17" (1/2) ... [2021-05-03 16:56:18,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f40c7a and model type parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 04:56:18, skipping insertion in model container [2021-05-03 16:56:18,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 04:56:18" (2/2) ... [2021-05-03 16:56:18,460 INFO L111 eAbstractionObserver]: Analyzing ICFG parray-copy.wvr.bpl [2021-05-03 16:56:18,465 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-03 16:56:18,465 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-03 16:56:18,468 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 16:56:18,469 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-03 16:56:18,509 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-05-03 16:56:18,528 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-05-03 16:56:18,564 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 16:56:18,565 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 16:56:18,565 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-03 16:56:18,565 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 16:56:18,565 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 16:56:18,565 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 16:56:18,565 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 16:56:18,565 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 16:56:18,574 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 31 transitions, 86 flow [2021-05-03 16:56:18,587 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 116 states, 114 states have (on average 2.7719298245614037) internal successors, (316), 115 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:18,590 INFO L276 IsEmpty]: Start isEmpty. Operand has 116 states, 114 states have (on average 2.7719298245614037) internal successors, (316), 115 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:18,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 16:56:18,597 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:56:18,598 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:56:18,598 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:56:18,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:56:18,604 INFO L82 PathProgramCache]: Analyzing trace with hash -482426042, now seen corresponding path program 1 times [2021-05-03 16:56:18,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:56:18,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934616857] [2021-05-03 16:56:18,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:56:18,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:56:18,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:56:18,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934616857] [2021-05-03 16:56:18,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:56:18,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 16:56:18,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592959545] [2021-05-03 16:56:18,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 16:56:18,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:56:18,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 16:56:18,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 16:56:18,820 INFO L87 Difference]: Start difference. First operand has 116 states, 114 states have (on average 2.7719298245614037) internal successors, (316), 115 states have internal predecessors, (316), 0 states have call successors, (0), 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 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:18,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:56:18,900 INFO L93 Difference]: Finished difference Result 135 states and 376 transitions. [2021-05-03 16:56:18,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 16:56:18,902 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 [2021-05-03 16:56:18,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:56:18,919 INFO L225 Difference]: With dead ends: 135 [2021-05-03 16:56:18,920 INFO L226 Difference]: Without dead ends: 135 [2021-05-03 16:56:18,921 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 16:56:18,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-03 16:56:18,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2021-05-03 16:56:18,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.8059701492537314) internal successors, (376), 134 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:18,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 376 transitions. [2021-05-03 16:56:18,980 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 376 transitions. Word has length 20 [2021-05-03 16:56:18,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:56:18,981 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 376 transitions. [2021-05-03 16:56:18,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:18,981 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 376 transitions. [2021-05-03 16:56:18,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 16:56:18,983 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:56:18,983 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:56:18,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 16:56:18,983 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:56:18,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:56:18,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1659723100, now seen corresponding path program 1 times [2021-05-03 16:56:18,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:56:18,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024307038] [2021-05-03 16:56:18,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:56:18,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:56:19,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:56:19,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024307038] [2021-05-03 16:56:19,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:56:19,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 16:56:19,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863234598] [2021-05-03 16:56:19,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 16:56:19,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:56:19,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 16:56:19,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-03 16:56:19,038 INFO L87 Difference]: Start difference. First operand 135 states and 376 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:19,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:56:19,100 INFO L93 Difference]: Finished difference Result 185 states and 524 transitions. [2021-05-03 16:56:19,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 16:56:19,101 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 [2021-05-03 16:56:19,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:56:19,104 INFO L225 Difference]: With dead ends: 185 [2021-05-03 16:56:19,105 INFO L226 Difference]: Without dead ends: 185 [2021-05-03 16:56:19,106 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-03 16:56:19,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-05-03 16:56:19,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 160. [2021-05-03 16:56:19,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.830188679245283) internal successors, (450), 159 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:19,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 450 transitions. [2021-05-03 16:56:19,127 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 450 transitions. Word has length 22 [2021-05-03 16:56:19,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:56:19,127 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 450 transitions. [2021-05-03 16:56:19,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:19,127 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 450 transitions. [2021-05-03 16:56:19,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:56:19,129 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:56:19,129 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:56:19,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 16:56:19,129 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:56:19,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:56:19,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1666279556, now seen corresponding path program 1 times [2021-05-03 16:56:19,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:56:19,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408681756] [2021-05-03 16:56:19,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:56:19,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:56:19,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:56:19,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408681756] [2021-05-03 16:56:19,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646897981] [2021-05-03 16:56:19,364 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 [2021-05-03 16:56:19,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:56:19,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 16:56:19,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:56:19,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 16:56:19,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:56:19,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:56:19,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:56:19,848 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:20 [2021-05-03 16:56:19,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:56:19,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:56:19,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-05-03 16:56:19,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849443840] [2021-05-03 16:56:19,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:56:19,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:56:19,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:56:19,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:56:19,895 INFO L87 Difference]: Start difference. First operand 160 states and 450 transitions. Second operand has 16 states, 16 states have (on average 2.6875) 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) [2021-05-03 16:56:20,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:56:20,471 INFO L93 Difference]: Finished difference Result 395 states and 1116 transitions. [2021-05-03 16:56:20,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 16:56:20,473 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) 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 24 [2021-05-03 16:56:20,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:56:20,475 INFO L225 Difference]: With dead ends: 395 [2021-05-03 16:56:20,476 INFO L226 Difference]: Without dead ends: 280 [2021-05-03 16:56:20,476 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 628.6ms TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:56:20,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-05-03 16:56:20,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 194. [2021-05-03 16:56:20,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.8911917098445596) internal successors, (558), 193 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:20,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 558 transitions. [2021-05-03 16:56:20,492 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 558 transitions. Word has length 24 [2021-05-03 16:56:20,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:56:20,492 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 558 transitions. [2021-05-03 16:56:20,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) 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) [2021-05-03 16:56:20,492 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 558 transitions. [2021-05-03 16:56:20,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:56:20,494 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:56:20,494 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:56:20,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-03 16:56:20,711 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:56:20,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:56:20,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1670859648, now seen corresponding path program 2 times [2021-05-03 16:56:20,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:56:20,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810228502] [2021-05-03 16:56:20,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:56:20,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:56:21,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:56:21,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810228502] [2021-05-03 16:56:21,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739008718] [2021-05-03 16:56:21,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:56:21,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:56:21,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:56:21,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 16:56:21,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:56:21,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 16:56:21,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:56:21,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:56:21,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:56:21,275 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:23 [2021-05-03 16:56:21,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:56:21,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:56:21,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-05-03 16:56:21,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631547609] [2021-05-03 16:56:21,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 16:56:21,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:56:21,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 16:56:21,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-03 16:56:21,399 INFO L87 Difference]: Start difference. First operand 194 states and 558 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:22,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:56:22,596 INFO L93 Difference]: Finished difference Result 639 states and 1800 transitions. [2021-05-03 16:56:22,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 16:56:22,605 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:56:22,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:56:22,609 INFO L225 Difference]: With dead ends: 639 [2021-05-03 16:56:22,610 INFO L226 Difference]: Without dead ends: 546 [2021-05-03 16:56:22,610 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1089.1ms TimeCoverageRelationStatistics Valid=307, Invalid=1253, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 16:56:22,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-05-03 16:56:22,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 281. [2021-05-03 16:56:22,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.8892857142857142) internal successors, (809), 280 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:22,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 809 transitions. [2021-05-03 16:56:22,628 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 809 transitions. Word has length 24 [2021-05-03 16:56:22,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:56:22,629 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 809 transitions. [2021-05-03 16:56:22,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:22,629 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 809 transitions. [2021-05-03 16:56:22,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:56:22,631 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:56:22,631 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:56:22,842 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:56:22,842 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:56:22,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:56:22,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1190941142, now seen corresponding path program 3 times [2021-05-03 16:56:22,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:56:22,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416172276] [2021-05-03 16:56:22,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:56:22,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:56:22,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:56:22,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416172276] [2021-05-03 16:56:22,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997137559] [2021-05-03 16:56:22,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:56:22,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 16:56:22,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:56:22,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 16:56:22,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:56:23,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 16:56:23,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:56:23,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:56:23,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:56:23,065 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-05-03 16:56:23,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 16:56:23,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:56:23,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-05-03 16:56:23,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367543658] [2021-05-03 16:56:23,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 16:56:23,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:56:23,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 16:56:23,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:56:23,217 INFO L87 Difference]: Start difference. First operand 281 states and 809 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:24,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:56:24,834 INFO L93 Difference]: Finished difference Result 1001 states and 2814 transitions. [2021-05-03 16:56:24,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-03 16:56:24,838 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:56:24,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:56:24,842 INFO L225 Difference]: With dead ends: 1001 [2021-05-03 16:56:24,842 INFO L226 Difference]: Without dead ends: 966 [2021-05-03 16:56:24,843 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1058.7ms TimeCoverageRelationStatistics Valid=549, Invalid=2757, Unknown=0, NotChecked=0, Total=3306 [2021-05-03 16:56:24,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-05-03 16:56:24,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 305. [2021-05-03 16:56:24,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.924342105263158) internal successors, (889), 304 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:24,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 889 transitions. [2021-05-03 16:56:24,858 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 889 transitions. Word has length 26 [2021-05-03 16:56:24,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:56:24,858 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 889 transitions. [2021-05-03 16:56:24,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:24,858 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 889 transitions. [2021-05-03 16:56:24,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:56:24,860 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:56:24,860 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:56:25,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:56:25,074 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:56:25,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:56:25,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1175480346, now seen corresponding path program 4 times [2021-05-03 16:56:25,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:56:25,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048438061] [2021-05-03 16:56:25,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:56:25,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:56:25,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:56:25,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048438061] [2021-05-03 16:56:25,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535496193] [2021-05-03 16:56:25,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 16:56:25,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:56:25,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:56:25,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:56:25,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:56:25,393 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:56:25,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:56:25,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:56:25,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682463126] [2021-05-03 16:56:25,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:56:25,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:56:25,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:56:25,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:56:25,398 INFO L87 Difference]: Start difference. First operand 305 states and 889 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 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) [2021-05-03 16:56:26,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:56:26,261 INFO L93 Difference]: Finished difference Result 1201 states and 3376 transitions. [2021-05-03 16:56:26,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-03 16:56:26,262 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:56:26,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:56:26,267 INFO L225 Difference]: With dead ends: 1201 [2021-05-03 16:56:26,268 INFO L226 Difference]: Without dead ends: 1201 [2021-05-03 16:56:26,268 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 510.8ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 16:56:26,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-05-03 16:56:26,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 365. [2021-05-03 16:56:26,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 3.0961538461538463) internal successors, (1127), 364 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:26,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 1127 transitions. [2021-05-03 16:56:26,287 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 1127 transitions. Word has length 26 [2021-05-03 16:56:26,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:56:26,287 INFO L480 AbstractCegarLoop]: Abstraction has 365 states and 1127 transitions. [2021-05-03 16:56:26,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 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) [2021-05-03 16:56:26,287 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 1127 transitions. [2021-05-03 16:56:26,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:56:26,289 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:56:26,290 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:56:26,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:56:26,499 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:56:26,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:56:26,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1693913438, now seen corresponding path program 5 times [2021-05-03 16:56:26,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:56:26,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471845759] [2021-05-03 16:56:26,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:56:26,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:56:26,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:56:26,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471845759] [2021-05-03 16:56:26,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374688614] [2021-05-03 16:56:26,566 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:56:26,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:56:26,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:56:26,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:56:26,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:56:26,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:56:26,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:56:26,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:56:26,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807372818] [2021-05-03 16:56:26,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:56:26,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:56:26,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:56:26,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:56:26,694 INFO L87 Difference]: Start difference. First operand 365 states and 1127 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 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) [2021-05-03 16:56:27,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:56:27,612 INFO L93 Difference]: Finished difference Result 1858 states and 5235 transitions. [2021-05-03 16:56:27,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-03 16:56:27,613 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:56:27,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:56:27,620 INFO L225 Difference]: With dead ends: 1858 [2021-05-03 16:56:27,620 INFO L226 Difference]: Without dead ends: 1858 [2021-05-03 16:56:27,622 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 450.4ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 16:56:27,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2021-05-03 16:56:27,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 388. [2021-05-03 16:56:27,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 3.1834625322997416) internal successors, (1232), 387 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:27,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1232 transitions. [2021-05-03 16:56:27,647 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1232 transitions. Word has length 26 [2021-05-03 16:56:27,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:56:27,647 INFO L480 AbstractCegarLoop]: Abstraction has 388 states and 1232 transitions. [2021-05-03 16:56:27,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 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) [2021-05-03 16:56:27,647 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1232 transitions. [2021-05-03 16:56:27,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:56:27,649 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:56:27,649 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:56:27,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-03 16:56:27,867 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:56:27,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:56:27,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1481056820, now seen corresponding path program 6 times [2021-05-03 16:56:27,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:56:27,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402615828] [2021-05-03 16:56:27,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:56:27,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:56:27,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:56:27,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402615828] [2021-05-03 16:56:27,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284658176] [2021-05-03 16:56:27,929 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:56:27,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:56:27,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:56:27,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:56:27,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:56:28,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:56:28,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:56:28,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 16:56:28,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515224734] [2021-05-03 16:56:28,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 16:56:28,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:56:28,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 16:56:28,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:56:28,033 INFO L87 Difference]: Start difference. First operand 388 states and 1232 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) 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) [2021-05-03 16:56:28,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:56:28,742 INFO L93 Difference]: Finished difference Result 1674 states and 4689 transitions. [2021-05-03 16:56:28,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 16:56:28,742 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) 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 26 [2021-05-03 16:56:28,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:56:28,750 INFO L225 Difference]: With dead ends: 1674 [2021-05-03 16:56:28,750 INFO L226 Difference]: Without dead ends: 1670 [2021-05-03 16:56:28,750 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 362.2ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 16:56:28,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2021-05-03 16:56:28,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 402. [2021-05-03 16:56:28,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.1645885286783044) internal successors, (1269), 401 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:28,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1269 transitions. [2021-05-03 16:56:28,773 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1269 transitions. Word has length 26 [2021-05-03 16:56:28,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:56:28,774 INFO L480 AbstractCegarLoop]: Abstraction has 402 states and 1269 transitions. [2021-05-03 16:56:28,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) 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) [2021-05-03 16:56:28,774 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1269 transitions. [2021-05-03 16:56:28,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:56:28,775 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:56:28,775 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:56:28,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:56:28,993 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:56:28,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:56:28,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1751566512, now seen corresponding path program 7 times [2021-05-03 16:56:28,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:56:28,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405515136] [2021-05-03 16:56:28,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:56:28,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:56:29,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:56:29,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405515136] [2021-05-03 16:56:29,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055856898] [2021-05-03 16:56:29,051 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:56:29,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:56:29,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:56:29,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:56:29,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:56:29,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:56:29,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 16:56:29,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959057741] [2021-05-03 16:56:29,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 16:56:29,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:56:29,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 16:56:29,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:56:29,163 INFO L87 Difference]: Start difference. First operand 402 states and 1269 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) 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) [2021-05-03 16:56:29,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:56:29,921 INFO L93 Difference]: Finished difference Result 1844 states and 5052 transitions. [2021-05-03 16:56:29,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-03 16:56:29,921 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) 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 26 [2021-05-03 16:56:29,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:56:29,928 INFO L225 Difference]: With dead ends: 1844 [2021-05-03 16:56:29,928 INFO L226 Difference]: Without dead ends: 1844 [2021-05-03 16:56:29,929 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 424.1ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 16:56:29,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-05-03 16:56:29,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 400. [2021-05-03 16:56:29,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.1679197994987467) internal successors, (1264), 399 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:29,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1264 transitions. [2021-05-03 16:56:29,950 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1264 transitions. Word has length 26 [2021-05-03 16:56:29,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:56:29,950 INFO L480 AbstractCegarLoop]: Abstraction has 400 states and 1264 transitions. [2021-05-03 16:56:29,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) 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) [2021-05-03 16:56:29,950 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1264 transitions. [2021-05-03 16:56:29,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:56:29,951 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:56:29,951 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:56:30,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:56:30,165 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:56:30,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:56:30,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1992513178, now seen corresponding path program 8 times [2021-05-03 16:56:30,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:56:30,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441004229] [2021-05-03 16:56:30,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:56:30,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:56:30,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:56:30,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441004229] [2021-05-03 16:56:30,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735760698] [2021-05-03 16:56:30,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 16:56:30,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:56:30,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:56:30,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:56:30,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:56:30,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:56:30,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:56:30,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:56:30,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188995828] [2021-05-03 16:56:30,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:56:30,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:56:30,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:56:30,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:56:30,382 INFO L87 Difference]: Start difference. First operand 400 states and 1264 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 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) [2021-05-03 16:56:30,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:56:30,917 INFO L93 Difference]: Finished difference Result 1308 states and 3890 transitions. [2021-05-03 16:56:30,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 16:56:30,917 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:56:30,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:56:30,922 INFO L225 Difference]: With dead ends: 1308 [2021-05-03 16:56:30,922 INFO L226 Difference]: Without dead ends: 1308 [2021-05-03 16:56:30,923 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 351.7ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 16:56:30,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-05-03 16:56:30,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 415. [2021-05-03 16:56:30,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.2294685990338166) internal successors, (1337), 414 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:30,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1337 transitions. [2021-05-03 16:56:30,939 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1337 transitions. Word has length 26 [2021-05-03 16:56:30,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:56:30,939 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 1337 transitions. [2021-05-03 16:56:30,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 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) [2021-05-03 16:56:30,939 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1337 transitions. [2021-05-03 16:56:30,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:56:30,940 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:56:30,940 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:56:31,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-03 16:56:31,157 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:56:31,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:56:31,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1182457080, now seen corresponding path program 9 times [2021-05-03 16:56:31,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:56:31,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605208515] [2021-05-03 16:56:31,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:56:31,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:56:31,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:56:31,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605208515] [2021-05-03 16:56:31,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090033551] [2021-05-03 16:56:31,222 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 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 [2021-05-03 16:56:31,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:56:31,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:56:31,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:56:31,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:56:31,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:56:31,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:56:31,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 16:56:31,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384434639] [2021-05-03 16:56:31,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 16:56:31,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:56:31,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 16:56:31,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:56:31,365 INFO L87 Difference]: Start difference. First operand 415 states and 1337 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) 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) [2021-05-03 16:56:31,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:56:31,727 INFO L93 Difference]: Finished difference Result 1124 states and 3354 transitions. [2021-05-03 16:56:31,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 16:56:31,727 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) 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 26 [2021-05-03 16:56:31,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:56:31,733 INFO L225 Difference]: With dead ends: 1124 [2021-05-03 16:56:31,733 INFO L226 Difference]: Without dead ends: 1120 [2021-05-03 16:56:31,734 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 213.4ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:56:31,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-05-03 16:56:31,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 421. [2021-05-03 16:56:31,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 3.2333333333333334) internal successors, (1358), 420 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:31,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1358 transitions. [2021-05-03 16:56:31,747 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1358 transitions. Word has length 26 [2021-05-03 16:56:31,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:56:31,747 INFO L480 AbstractCegarLoop]: Abstraction has 421 states and 1358 transitions. [2021-05-03 16:56:31,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) 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) [2021-05-03 16:56:31,747 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1358 transitions. [2021-05-03 16:56:31,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:56:31,749 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:56:31,749 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:56:31,965 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:56:31,965 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:56:31,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:56:31,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1452966772, now seen corresponding path program 10 times [2021-05-03 16:56:31,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:56:31,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600460919] [2021-05-03 16:56:31,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:56:31,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:56:32,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:56:32,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600460919] [2021-05-03 16:56:32,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457999890] [2021-05-03 16:56:32,015 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 16:56:32,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:56:32,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:56:32,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:56:32,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:56:32,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:56:32,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:56:32,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 16:56:32,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325335016] [2021-05-03 16:56:32,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 16:56:32,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:56:32,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 16:56:32,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:56:32,154 INFO L87 Difference]: Start difference. First operand 421 states and 1358 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) 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) [2021-05-03 16:56:32,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:56:32,625 INFO L93 Difference]: Finished difference Result 1207 states and 3549 transitions. [2021-05-03 16:56:32,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 16:56:32,628 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) 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 26 [2021-05-03 16:56:32,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:56:32,633 INFO L225 Difference]: With dead ends: 1207 [2021-05-03 16:56:32,633 INFO L226 Difference]: Without dead ends: 1207 [2021-05-03 16:56:32,633 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 271.5ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 16:56:32,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2021-05-03 16:56:32,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 415. [2021-05-03 16:56:32,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.2294685990338166) internal successors, (1337), 414 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:32,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1337 transitions. [2021-05-03 16:56:32,647 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1337 transitions. Word has length 26 [2021-05-03 16:56:32,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:56:32,647 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 1337 transitions. [2021-05-03 16:56:32,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) 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) [2021-05-03 16:56:32,647 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1337 transitions. [2021-05-03 16:56:32,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:56:32,648 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:56:32,648 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:56:32,866 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:56:32,866 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:56:32,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:56:32,866 INFO L82 PathProgramCache]: Analyzing trace with hash 2037994958, now seen corresponding path program 11 times [2021-05-03 16:56:32,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:56:32,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603520869] [2021-05-03 16:56:32,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:56:32,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:56:32,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:56:32,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603520869] [2021-05-03 16:56:32,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109720076] [2021-05-03 16:56:32,941 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 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 [2021-05-03 16:56:32,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:56:32,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:56:32,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:56:32,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:56:33,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:56:33,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:56:33,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 16:56:33,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680809688] [2021-05-03 16:56:33,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:56:33,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:56:33,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:56:33,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:56:33,031 INFO L87 Difference]: Start difference. First operand 415 states and 1337 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-05-03 16:56:33,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:56:33,311 INFO L93 Difference]: Finished difference Result 824 states and 2512 transitions. [2021-05-03 16:56:33,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 16:56:33,311 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 26 [2021-05-03 16:56:33,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:56:33,315 INFO L225 Difference]: With dead ends: 824 [2021-05-03 16:56:33,315 INFO L226 Difference]: Without dead ends: 812 [2021-05-03 16:56:33,315 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 170.9ms TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2021-05-03 16:56:33,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-05-03 16:56:33,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 433. [2021-05-03 16:56:33,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.2175925925925926) internal successors, (1390), 432 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:33,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1390 transitions. [2021-05-03 16:56:33,326 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1390 transitions. Word has length 26 [2021-05-03 16:56:33,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:56:33,326 INFO L480 AbstractCegarLoop]: Abstraction has 433 states and 1390 transitions. [2021-05-03 16:56:33,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-05-03 16:56:33,326 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1390 transitions. [2021-05-03 16:56:33,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:56:33,327 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:56:33,328 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:56:33,546 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-03 16:56:33,546 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:56:33,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:56:33,547 INFO L82 PathProgramCache]: Analyzing trace with hash 545990226, now seen corresponding path program 12 times [2021-05-03 16:56:33,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:56:33,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761921069] [2021-05-03 16:56:33,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:56:33,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:56:33,601 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:56:33,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761921069] [2021-05-03 16:56:33,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338609634] [2021-05-03 16:56:33,601 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 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 [2021-05-03 16:56:33,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:56:33,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:56:33,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:56:33,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:56:33,738 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:56:33,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:56:33,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 16:56:33,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878468137] [2021-05-03 16:56:33,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:56:33,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:56:33,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:56:33,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:56:33,740 INFO L87 Difference]: Start difference. First operand 433 states and 1390 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-05-03 16:56:34,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:56:34,032 INFO L93 Difference]: Finished difference Result 999 states and 2955 transitions. [2021-05-03 16:56:34,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 16:56:34,032 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 26 [2021-05-03 16:56:34,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:56:34,036 INFO L225 Difference]: With dead ends: 999 [2021-05-03 16:56:34,037 INFO L226 Difference]: Without dead ends: 995 [2021-05-03 16:56:34,037 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 189.9ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:56:34,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2021-05-03 16:56:34,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 472. [2021-05-03 16:56:34,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.2229299363057327) internal successors, (1518), 471 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:34,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1518 transitions. [2021-05-03 16:56:34,055 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1518 transitions. Word has length 26 [2021-05-03 16:56:34,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:56:34,055 INFO L480 AbstractCegarLoop]: Abstraction has 472 states and 1518 transitions. [2021-05-03 16:56:34,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-05-03 16:56:34,055 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1518 transitions. [2021-05-03 16:56:34,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:56:34,058 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:56:34,058 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:56:34,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-03 16:56:34,266 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:56:34,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:56:34,267 INFO L82 PathProgramCache]: Analyzing trace with hash 816499918, now seen corresponding path program 13 times [2021-05-03 16:56:34,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:56:34,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305054612] [2021-05-03 16:56:34,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:56:34,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:56:34,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:56:34,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305054612] [2021-05-03 16:56:34,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074134756] [2021-05-03 16:56:34,366 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 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 [2021-05-03 16:56:34,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:56:34,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:56:34,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:56:34,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:56:34,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:56:34,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 16:56:34,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542257778] [2021-05-03 16:56:34,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:56:34,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:56:34,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:56:34,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:56:34,460 INFO L87 Difference]: Start difference. First operand 472 states and 1518 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-05-03 16:56:34,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:56:34,907 INFO L93 Difference]: Finished difference Result 1053 states and 3099 transitions. [2021-05-03 16:56:34,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 16:56:34,907 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 26 [2021-05-03 16:56:34,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:56:34,912 INFO L225 Difference]: With dead ends: 1053 [2021-05-03 16:56:34,912 INFO L226 Difference]: Without dead ends: 1053 [2021-05-03 16:56:34,914 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 306.3ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 16:56:34,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2021-05-03 16:56:34,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 464. [2021-05-03 16:56:34,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.2311015118790496) internal successors, (1496), 463 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:34,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1496 transitions. [2021-05-03 16:56:34,949 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1496 transitions. Word has length 26 [2021-05-03 16:56:34,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:56:34,949 INFO L480 AbstractCegarLoop]: Abstraction has 464 states and 1496 transitions. [2021-05-03 16:56:34,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-05-03 16:56:34,949 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1496 transitions. [2021-05-03 16:56:34,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 16:56:34,951 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:56:34,951 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:56:35,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-03 16:56:35,161 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:56:35,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:56:35,161 INFO L82 PathProgramCache]: Analyzing trace with hash -980752764, now seen corresponding path program 1 times [2021-05-03 16:56:35,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:56:35,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972528988] [2021-05-03 16:56:35,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:56:35,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:56:35,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:56:35,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972528988] [2021-05-03 16:56:35,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923314769] [2021-05-03 16:56:35,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-03 16:56:35,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:56:35,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 16:56:35,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:56:35,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 16:56:35,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:56:35,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:56:35,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:56:35,724 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:27 [2021-05-03 16:56:35,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:56:35,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 16:56:35,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:56:35,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:56:35,818 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 1 xjuncts. [2021-05-03 16:56:35,818 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:34 [2021-05-03 16:56:35,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:56:35,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:56:35,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-05-03 16:56:35,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450081125] [2021-05-03 16:56:35,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 16:56:35,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:56:35,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 16:56:35,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-05-03 16:56:35,908 INFO L87 Difference]: Start difference. First operand 464 states and 1496 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:36,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:56:36,742 INFO L93 Difference]: Finished difference Result 853 states and 2545 transitions. [2021-05-03 16:56:36,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 16:56:36,743 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 16:56:36,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:56:36,746 INFO L225 Difference]: With dead ends: 853 [2021-05-03 16:56:36,746 INFO L226 Difference]: Without dead ends: 766 [2021-05-03 16:56:36,746 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 934.6ms TimeCoverageRelationStatistics Valid=245, Invalid=1161, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 16:56:36,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-05-03 16:56:36,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 490. [2021-05-03 16:56:36,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.216768916155419) internal successors, (1573), 489 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:36,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1573 transitions. [2021-05-03 16:56:36,763 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1573 transitions. Word has length 28 [2021-05-03 16:56:36,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:56:36,763 INFO L480 AbstractCegarLoop]: Abstraction has 490 states and 1573 transitions. [2021-05-03 16:56:36,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:36,764 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1573 transitions. [2021-05-03 16:56:36,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 16:56:36,765 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:56:36,765 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:56:36,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:56:36,969 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:56:36,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:56:36,969 INFO L82 PathProgramCache]: Analyzing trace with hash 735427332, now seen corresponding path program 2 times [2021-05-03 16:56:36,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:56:36,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78569396] [2021-05-03 16:56:36,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:56:36,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:56:37,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:56:37,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78569396] [2021-05-03 16:56:37,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778009818] [2021-05-03 16:56:37,351 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 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 [2021-05-03 16:56:37,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:56:37,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:56:37,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 16:56:37,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:56:37,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 16:56:37,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:56:37,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:56:37,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:56:37,486 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-05-03 16:56:37,586 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-05-03 16:56:37,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 16:56:37,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:56:37,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:56:37,599 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 1 xjuncts. [2021-05-03 16:56:37,599 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:34 [2021-05-03 16:56:37,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 16:56:37,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:56:37,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-05-03 16:56:37,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159474926] [2021-05-03 16:56:37,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 16:56:37,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:56:37,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 16:56:37,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-05-03 16:56:37,738 INFO L87 Difference]: Start difference. First operand 490 states and 1573 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:39,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:56:39,606 INFO L93 Difference]: Finished difference Result 1157 states and 3418 transitions. [2021-05-03 16:56:39,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 16:56:39,606 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 16:56:39,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:56:39,623 INFO L225 Difference]: With dead ends: 1157 [2021-05-03 16:56:39,623 INFO L226 Difference]: Without dead ends: 1025 [2021-05-03 16:56:39,624 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1646.0ms TimeCoverageRelationStatistics Valid=417, Invalid=2235, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 16:56:39,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2021-05-03 16:56:39,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 537. [2021-05-03 16:56:39,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 3.1940298507462686) internal successors, (1712), 536 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:39,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 1712 transitions. [2021-05-03 16:56:39,663 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 1712 transitions. Word has length 28 [2021-05-03 16:56:39,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:56:39,664 INFO L480 AbstractCegarLoop]: Abstraction has 537 states and 1712 transitions. [2021-05-03 16:56:39,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:39,665 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 1712 transitions. [2021-05-03 16:56:39,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 16:56:39,666 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:56:39,666 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:56:39,894 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-03 16:56:39,894 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:56:39,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:56:39,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1417721472, now seen corresponding path program 14 times [2021-05-03 16:56:39,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:56:39,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254387549] [2021-05-03 16:56:39,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:56:39,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:56:40,408 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:56:40,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254387549] [2021-05-03 16:56:40,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395681663] [2021-05-03 16:56:40,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:56:40,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:56:40,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:56:40,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 16:56:40,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:56:40,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 16:56:40,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:56:40,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:56:40,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:56:40,565 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:22 [2021-05-03 16:56:40,633 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-05-03 16:56:40,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 16:56:40,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:56:40,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:56:40,650 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 1 xjuncts. [2021-05-03 16:56:40,650 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:34 [2021-05-03 16:56:40,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 16:56:40,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:56:40,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-05-03 16:56:40,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603169952] [2021-05-03 16:56:40,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 16:56:40,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:56:40,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 16:56:40,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-05-03 16:56:40,748 INFO L87 Difference]: Start difference. First operand 537 states and 1712 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:42,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:56:42,134 INFO L93 Difference]: Finished difference Result 1024 states and 3050 transitions. [2021-05-03 16:56:42,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 16:56:42,135 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 16:56:42,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:56:42,137 INFO L225 Difference]: With dead ends: 1024 [2021-05-03 16:56:42,137 INFO L226 Difference]: Without dead ends: 946 [2021-05-03 16:56:42,138 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1426.7ms TimeCoverageRelationStatistics Valid=419, Invalid=1837, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 16:56:42,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-05-03 16:56:42,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 637. [2021-05-03 16:56:42,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 3.10062893081761) internal successors, (1972), 636 states have internal predecessors, (1972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:42,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1972 transitions. [2021-05-03 16:56:42,148 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1972 transitions. Word has length 28 [2021-05-03 16:56:42,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:56:42,148 INFO L480 AbstractCegarLoop]: Abstraction has 637 states and 1972 transitions. [2021-05-03 16:56:42,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:42,148 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1972 transitions. [2021-05-03 16:56:42,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 16:56:42,149 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:56:42,149 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:56:42,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-03 16:56:42,364 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:56:42,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:56:42,365 INFO L82 PathProgramCache]: Analyzing trace with hash 916230348, now seen corresponding path program 3 times [2021-05-03 16:56:42,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:56:42,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887774540] [2021-05-03 16:56:42,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:56:42,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:56:42,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:56:42,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887774540] [2021-05-03 16:56:42,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292311082] [2021-05-03 16:56:42,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 16:56:42,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 16:56:42,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:56:42,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 16:56:42,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:56:42,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 16:56:42,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:56:42,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:56:42,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:56:42,792 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-05-03 16:56:42,866 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-05-03 16:56:42,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 16:56:42,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:56:42,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:56:42,879 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 1 xjuncts. [2021-05-03 16:56:42,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:37 [2021-05-03 16:56:43,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 16:56:43,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:56:43,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-05-03 16:56:43,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993001565] [2021-05-03 16:56:43,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 16:56:43,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:56:43,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 16:56:43,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-05-03 16:56:43,018 INFO L87 Difference]: Start difference. First operand 637 states and 1972 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:45,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:56:45,597 INFO L93 Difference]: Finished difference Result 1838 states and 5313 transitions. [2021-05-03 16:56:45,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-03 16:56:45,597 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 16:56:45,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:56:45,601 INFO L225 Difference]: With dead ends: 1838 [2021-05-03 16:56:45,601 INFO L226 Difference]: Without dead ends: 1655 [2021-05-03 16:56:45,601 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 1993.9ms TimeCoverageRelationStatistics Valid=569, Invalid=3091, Unknown=0, NotChecked=0, Total=3660 [2021-05-03 16:56:45,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1655 states. [2021-05-03 16:56:45,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1655 to 692. [2021-05-03 16:56:45,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 3.1577424023154848) internal successors, (2182), 691 states have internal predecessors, (2182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:45,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 2182 transitions. [2021-05-03 16:56:45,619 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 2182 transitions. Word has length 28 [2021-05-03 16:56:45,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:56:45,620 INFO L480 AbstractCegarLoop]: Abstraction has 692 states and 2182 transitions. [2021-05-03 16:56:45,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:45,620 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 2182 transitions. [2021-05-03 16:56:45,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 16:56:45,621 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:56:45,621 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:56:45,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:56:45,837 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:56:45,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:56:45,837 INFO L82 PathProgramCache]: Analyzing trace with hash 937707268, now seen corresponding path program 15 times [2021-05-03 16:56:45,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:56:45,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484130332] [2021-05-03 16:56:45,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:56:45,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:56:46,221 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:56:46,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484130332] [2021-05-03 16:56:46,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117356040] [2021-05-03 16:56:46,222 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 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 [2021-05-03 16:56:46,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:56:46,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:56:46,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 16:56:46,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:56:46,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 16:56:46,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:56:46,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:56:46,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:56:46,366 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-05-03 16:56:46,456 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-05-03 16:56:46,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 16:56:46,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:56:46,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:56:46,471 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 1 xjuncts. [2021-05-03 16:56:46,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:34 [2021-05-03 16:56:46,574 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 16:56:46,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:56:46,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-05-03 16:56:46,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47683443] [2021-05-03 16:56:46,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 16:56:46,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:56:46,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 16:56:46,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-05-03 16:56:46,576 INFO L87 Difference]: Start difference. First operand 692 states and 2182 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:48,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:56:48,108 INFO L93 Difference]: Finished difference Result 1136 states and 3439 transitions. [2021-05-03 16:56:48,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 16:56:48,109 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 16:56:48,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:56:48,111 INFO L225 Difference]: With dead ends: 1136 [2021-05-03 16:56:48,112 INFO L226 Difference]: Without dead ends: 1058 [2021-05-03 16:56:48,112 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1376.9ms TimeCoverageRelationStatistics Valid=406, Invalid=2044, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 16:56:48,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-05-03 16:56:48,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 680. [2021-05-03 16:56:48,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 3.1723122238586154) internal successors, (2154), 679 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:48,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 2154 transitions. [2021-05-03 16:56:48,126 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 2154 transitions. Word has length 28 [2021-05-03 16:56:48,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:56:48,126 INFO L480 AbstractCegarLoop]: Abstraction has 680 states and 2154 transitions. [2021-05-03 16:56:48,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:48,127 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 2154 transitions. [2021-05-03 16:56:48,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 16:56:48,128 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:56:48,128 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:56:48,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:56:48,336 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:56:48,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:56:48,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1490293068, now seen corresponding path program 16 times [2021-05-03 16:56:48,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:56:48,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119759098] [2021-05-03 16:56:48,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:56:48,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:56:48,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:56:48,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119759098] [2021-05-03 16:56:48,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377383833] [2021-05-03 16:56:48,650 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 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 [2021-05-03 16:56:48,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:56:48,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:56:48,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 16:56:48,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:56:48,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 16:56:48,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:56:48,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:56:48,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:56:48,861 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:24 [2021-05-03 16:56:48,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:56:48,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-05-03 16:56:48,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:56:48,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:56:48,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:56:48,946 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:31 [2021-05-03 16:56:49,020 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:56:49,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:56:49,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2021-05-03 16:56:49,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272418568] [2021-05-03 16:56:49,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 16:56:49,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:56:49,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 16:56:49,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-05-03 16:56:49,022 INFO L87 Difference]: Start difference. First operand 680 states and 2154 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:51,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:56:51,300 INFO L93 Difference]: Finished difference Result 1629 states and 4937 transitions. [2021-05-03 16:56:51,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-03 16:56:51,300 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 16:56:51,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:56:51,303 INFO L225 Difference]: With dead ends: 1629 [2021-05-03 16:56:51,303 INFO L226 Difference]: Without dead ends: 1293 [2021-05-03 16:56:51,304 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 2084.3ms TimeCoverageRelationStatistics Valid=735, Invalid=3425, Unknown=0, NotChecked=0, Total=4160 [2021-05-03 16:56:51,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2021-05-03 16:56:51,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 920. [2021-05-03 16:56:51,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 3.263329706202394) internal successors, (2999), 919 states have internal predecessors, (2999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:51,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 2999 transitions. [2021-05-03 16:56:51,323 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 2999 transitions. Word has length 28 [2021-05-03 16:56:51,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:56:51,323 INFO L480 AbstractCegarLoop]: Abstraction has 920 states and 2999 transitions. [2021-05-03 16:56:51,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:51,323 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 2999 transitions. [2021-05-03 16:56:51,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 16:56:51,325 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:56:51,325 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:56:51,542 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:56:51,542 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:56:51,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:56:51,543 INFO L82 PathProgramCache]: Analyzing trace with hash -836691140, now seen corresponding path program 4 times [2021-05-03 16:56:51,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:56:51,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255961564] [2021-05-03 16:56:51,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:56:51,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:56:52,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:56:52,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255961564] [2021-05-03 16:56:52,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593043391] [2021-05-03 16:56:52,050 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 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 [2021-05-03 16:56:52,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:56:52,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:56:52,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 16:56:52,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:56:52,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 16:56:52,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:56:52,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:56:52,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:56:52,184 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-05-03 16:56:52,303 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-05-03 16:56:52,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 16:56:52,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:56:52,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:56:52,321 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 1 xjuncts. [2021-05-03 16:56:52,321 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:34 [2021-05-03 16:56:52,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:56:52,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:56:52,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-05-03 16:56:52,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581143138] [2021-05-03 16:56:52,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 16:56:52,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:56:52,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 16:56:52,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-05-03 16:56:52,505 INFO L87 Difference]: Start difference. First operand 920 states and 2999 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:53,059 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 57 [2021-05-03 16:56:53,532 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2021-05-03 16:56:54,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:56:54,628 INFO L93 Difference]: Finished difference Result 1891 states and 5788 transitions. [2021-05-03 16:56:54,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 16:56:54,629 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 16:56:54,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:56:54,635 INFO L225 Difference]: With dead ends: 1891 [2021-05-03 16:56:54,635 INFO L226 Difference]: Without dead ends: 1768 [2021-05-03 16:56:54,637 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 2005.0ms TimeCoverageRelationStatistics Valid=297, Invalid=1509, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 16:56:54,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1768 states. [2021-05-03 16:56:54,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1768 to 1049. [2021-05-03 16:56:54,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1048 states have (on average 3.25381679389313) internal successors, (3410), 1048 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:54,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 3410 transitions. [2021-05-03 16:56:54,667 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 3410 transitions. Word has length 28 [2021-05-03 16:56:54,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:56:54,667 INFO L480 AbstractCegarLoop]: Abstraction has 1049 states and 3410 transitions. [2021-05-03 16:56:54,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:54,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 3410 transitions. [2021-05-03 16:56:54,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 16:56:54,669 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:56:54,669 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:56:54,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-03 16:56:54,889 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:56:54,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:56:54,889 INFO L82 PathProgramCache]: Analyzing trace with hash -556203584, now seen corresponding path program 5 times [2021-05-03 16:56:54,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:56:54,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304123506] [2021-05-03 16:56:54,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:56:54,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:56:55,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:56:55,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304123506] [2021-05-03 16:56:55,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797382294] [2021-05-03 16:56:55,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 16:56:55,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:56:55,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:56:55,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 16:56:55,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:56:55,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 16:56:55,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:56:55,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:56:55,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:56:55,345 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:22 [2021-05-03 16:56:55,427 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-05-03 16:56:55,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 16:56:55,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:56:55,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:56:55,444 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 1 xjuncts. [2021-05-03 16:56:55,445 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:37 [2021-05-03 16:56:55,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:56:55,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:56:55,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 16:56:55,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512726796] [2021-05-03 16:56:55,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 16:56:55,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:56:55,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 16:56:55,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-05-03 16:56:55,662 INFO L87 Difference]: Start difference. First operand 1049 states and 3410 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:57,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:56:57,974 INFO L93 Difference]: Finished difference Result 2029 states and 6160 transitions. [2021-05-03 16:56:57,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 16:56:57,974 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 16:56:57,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:56:57,978 INFO L225 Difference]: With dead ends: 2029 [2021-05-03 16:56:57,978 INFO L226 Difference]: Without dead ends: 1767 [2021-05-03 16:56:57,979 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1886.8ms TimeCoverageRelationStatistics Valid=436, Invalid=2216, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 16:56:57,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2021-05-03 16:56:57,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1070. [2021-05-03 16:56:58,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 1069 states have (on average 3.2198316183348923) internal successors, (3442), 1069 states have internal predecessors, (3442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:58,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 3442 transitions. [2021-05-03 16:56:58,003 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 3442 transitions. Word has length 28 [2021-05-03 16:56:58,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:56:58,003 INFO L480 AbstractCegarLoop]: Abstraction has 1070 states and 3442 transitions. [2021-05-03 16:56:58,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:56:58,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 3442 transitions. [2021-05-03 16:56:58,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 16:56:58,005 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:56:58,005 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:56:58,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-03 16:56:58,221 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:56:58,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:56:58,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1520630964, now seen corresponding path program 6 times [2021-05-03 16:56:58,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:56:58,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578244484] [2021-05-03 16:56:58,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:56:58,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:56:58,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:56:58,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578244484] [2021-05-03 16:56:58,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762228782] [2021-05-03 16:56:58,619 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 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 [2021-05-03 16:56:58,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:56:58,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:56:58,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 16:56:58,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:56:58,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 16:56:58,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:56:58,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:56:58,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:56:58,750 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-05-03 16:56:58,797 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-05-03 16:56:58,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 16:56:58,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:56:58,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:56:58,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-05-03 16:56:58,821 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:33, output treesize:32 [2021-05-03 16:56:58,894 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-05-03 16:56:58,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 16:56:58,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:56:58,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:56:58,910 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 1 xjuncts. [2021-05-03 16:56:58,910 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:37 [2021-05-03 16:56:59,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:56:59,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:56:59,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-05-03 16:56:59,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833998848] [2021-05-03 16:56:59,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 16:56:59,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:56:59,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 16:56:59,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-05-03 16:56:59,079 INFO L87 Difference]: Start difference. First operand 1070 states and 3442 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:01,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:57:01,029 INFO L93 Difference]: Finished difference Result 2234 states and 6886 transitions. [2021-05-03 16:57:01,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 16:57:01,030 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 16:57:01,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:57:01,035 INFO L225 Difference]: With dead ends: 2234 [2021-05-03 16:57:01,035 INFO L226 Difference]: Without dead ends: 2061 [2021-05-03 16:57:01,035 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 1724.8ms TimeCoverageRelationStatistics Valid=382, Invalid=2270, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 16:57:01,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2021-05-03 16:57:01,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1141. [2021-05-03 16:57:01,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.219298245614035) internal successors, (3670), 1140 states have internal predecessors, (3670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:01,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3670 transitions. [2021-05-03 16:57:01,063 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3670 transitions. Word has length 28 [2021-05-03 16:57:01,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:57:01,063 INFO L480 AbstractCegarLoop]: Abstraction has 1141 states and 3670 transitions. [2021-05-03 16:57:01,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:01,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3670 transitions. [2021-05-03 16:57:01,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 16:57:01,065 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:57:01,065 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:57:01,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:57:01,283 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:57:01,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:57:01,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1530790852, now seen corresponding path program 7 times [2021-05-03 16:57:01,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:57:01,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562085671] [2021-05-03 16:57:01,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:57:01,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:57:01,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:01,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562085671] [2021-05-03 16:57:01,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746262430] [2021-05-03 16:57:01,683 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 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 [2021-05-03 16:57:01,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:57:01,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-03 16:57:01,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:57:01,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 16:57:01,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:57:01,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:57:01,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:57:01,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:30 [2021-05-03 16:57:01,929 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-05-03 16:57:01,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 16:57:01,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:57:01,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:57:01,958 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 1 xjuncts. [2021-05-03 16:57:01,958 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:42 [2021-05-03 16:57:02,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:57:02,034 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-05-03 16:57:02,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-05-03 16:57:02,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:57:02,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:57:02,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-05-03 16:57:02,057 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:49 [2021-05-03 16:57:02,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:02,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:57:02,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-05-03 16:57:02,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995776057] [2021-05-03 16:57:02,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 16:57:02,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:57:02,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 16:57:02,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-05-03 16:57:02,304 INFO L87 Difference]: Start difference. First operand 1141 states and 3670 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:03,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:57:03,558 INFO L93 Difference]: Finished difference Result 2251 states and 7100 transitions. [2021-05-03 16:57:03,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 16:57:03,558 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 16:57:03,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:57:03,564 INFO L225 Difference]: With dead ends: 2251 [2021-05-03 16:57:03,564 INFO L226 Difference]: Without dead ends: 1891 [2021-05-03 16:57:03,564 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1233.4ms TimeCoverageRelationStatistics Valid=285, Invalid=1355, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 16:57:03,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2021-05-03 16:57:03,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1165. [2021-05-03 16:57:03,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1164 states have (on average 3.2371134020618557) internal successors, (3768), 1164 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:03,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 3768 transitions. [2021-05-03 16:57:03,594 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 3768 transitions. Word has length 28 [2021-05-03 16:57:03,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:57:03,595 INFO L480 AbstractCegarLoop]: Abstraction has 1165 states and 3768 transitions. [2021-05-03 16:57:03,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:03,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 3768 transitions. [2021-05-03 16:57:03,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 16:57:03,598 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:57:03,598 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:57:03,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-03 16:57:03,813 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:57:03,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:57:03,813 INFO L82 PathProgramCache]: Analyzing trace with hash 55569732, now seen corresponding path program 8 times [2021-05-03 16:57:03,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:57:03,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819957255] [2021-05-03 16:57:03,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:57:03,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:57:04,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:04,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819957255] [2021-05-03 16:57:04,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76591837] [2021-05-03 16:57:04,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 16:57:04,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:57:04,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:57:04,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 16:57:04,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:57:04,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 16:57:04,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:57:04,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:57:04,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:57:04,483 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:22 [2021-05-03 16:57:04,556 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-05-03 16:57:04,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 16:57:04,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:57:04,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:57:04,574 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 1 xjuncts. [2021-05-03 16:57:04,574 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:34 [2021-05-03 16:57:04,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:04,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:57:04,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2021-05-03 16:57:04,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873591533] [2021-05-03 16:57:04,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:57:04,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:57:04,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:57:04,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:57:04,795 INFO L87 Difference]: Start difference. First operand 1165 states and 3768 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:05,202 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 44 [2021-05-03 16:57:05,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:57:05,720 INFO L93 Difference]: Finished difference Result 2014 states and 6436 transitions. [2021-05-03 16:57:05,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 16:57:05,720 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 16:57:05,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:57:05,724 INFO L225 Difference]: With dead ends: 2014 [2021-05-03 16:57:05,724 INFO L226 Difference]: Without dead ends: 1692 [2021-05-03 16:57:05,725 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1082.9ms TimeCoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:57:05,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2021-05-03 16:57:05,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1114. [2021-05-03 16:57:05,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1113 states have (on average 3.225516621743037) internal successors, (3590), 1113 states have internal predecessors, (3590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:05,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 3590 transitions. [2021-05-03 16:57:05,779 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 3590 transitions. Word has length 28 [2021-05-03 16:57:05,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:57:05,779 INFO L480 AbstractCegarLoop]: Abstraction has 1114 states and 3590 transitions. [2021-05-03 16:57:05,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:05,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 3590 transitions. [2021-05-03 16:57:05,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:57:05,794 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:57:05,795 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:57:06,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:57:06,013 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:57:06,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:57:06,013 INFO L82 PathProgramCache]: Analyzing trace with hash 930891622, now seen corresponding path program 9 times [2021-05-03 16:57:06,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:57:06,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909151730] [2021-05-03 16:57:06,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:57:06,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:57:06,086 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:06,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909151730] [2021-05-03 16:57:06,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529856461] [2021-05-03 16:57:06,087 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 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 [2021-05-03 16:57:06,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 16:57:06,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:57:06,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 16:57:06,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:57:06,223 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:57:06,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:57:06,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-05-03 16:57:06,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485777127] [2021-05-03 16:57:06,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:57:06,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:57:06,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:57:06,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:57:06,238 INFO L87 Difference]: Start difference. First operand 1114 states and 3590 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:07,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:57:07,918 INFO L93 Difference]: Finished difference Result 5462 states and 16045 transitions. [2021-05-03 16:57:07,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-03 16:57:07,919 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-03 16:57:07,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:57:07,930 INFO L225 Difference]: With dead ends: 5462 [2021-05-03 16:57:07,930 INFO L226 Difference]: Without dead ends: 5462 [2021-05-03 16:57:07,933 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3083 ImplicationChecksByTransitivity, 1097.4ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-05-03 16:57:07,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5462 states. [2021-05-03 16:57:08,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5462 to 1274. [2021-05-03 16:57:08,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1274 states, 1273 states have (on average 3.344854673998429) internal successors, (4258), 1273 states have internal predecessors, (4258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:08,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 4258 transitions. [2021-05-03 16:57:08,018 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 4258 transitions. Word has length 30 [2021-05-03 16:57:08,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:57:08,018 INFO L480 AbstractCegarLoop]: Abstraction has 1274 states and 4258 transitions. [2021-05-03 16:57:08,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:08,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 4258 transitions. [2021-05-03 16:57:08,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:57:08,030 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:57:08,030 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:57:08,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-03 16:57:08,247 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:57:08,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:57:08,260 INFO L82 PathProgramCache]: Analyzing trace with hash -707538508, now seen corresponding path program 10 times [2021-05-03 16:57:08,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:57:08,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637669192] [2021-05-03 16:57:08,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:57:08,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:57:08,332 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:08,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637669192] [2021-05-03 16:57:08,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937188639] [2021-05-03 16:57:08,333 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 16:57:08,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:57:08,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:57:08,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 16:57:08,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:57:08,478 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:57:08,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:57:08,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 16:57:08,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141677809] [2021-05-03 16:57:08,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 16:57:08,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:57:08,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 16:57:08,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-05-03 16:57:08,480 INFO L87 Difference]: Start difference. First operand 1274 states and 4258 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:09,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:57:09,376 INFO L93 Difference]: Finished difference Result 4112 states and 12021 transitions. [2021-05-03 16:57:09,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-03 16:57:09,377 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-03 16:57:09,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:57:09,385 INFO L225 Difference]: With dead ends: 4112 [2021-05-03 16:57:09,385 INFO L226 Difference]: Without dead ends: 4088 [2021-05-03 16:57:09,386 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 521.9ms TimeCoverageRelationStatistics Valid=680, Invalid=2400, Unknown=0, NotChecked=0, Total=3080 [2021-05-03 16:57:09,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4088 states. [2021-05-03 16:57:09,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4088 to 1288. [2021-05-03 16:57:09,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 3.3387723387723387) internal successors, (4297), 1287 states have internal predecessors, (4297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:09,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 4297 transitions. [2021-05-03 16:57:09,427 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 4297 transitions. Word has length 30 [2021-05-03 16:57:09,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:57:09,427 INFO L480 AbstractCegarLoop]: Abstraction has 1288 states and 4297 transitions. [2021-05-03 16:57:09,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:09,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 4297 transitions. [2021-05-03 16:57:09,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:57:09,429 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:57:09,429 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:57:09,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-03 16:57:09,630 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:57:09,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:57:09,630 INFO L82 PathProgramCache]: Analyzing trace with hash -437028816, now seen corresponding path program 11 times [2021-05-03 16:57:09,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:57:09,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163704437] [2021-05-03 16:57:09,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:57:09,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:57:09,770 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:09,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163704437] [2021-05-03 16:57:09,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341950546] [2021-05-03 16:57:09,770 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 16:57:09,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:57:09,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:57:09,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 16:57:09,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:57:09,905 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:57:09,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:57:09,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 16:57:09,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619112685] [2021-05-03 16:57:09,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 16:57:09,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:57:09,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 16:57:09,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-05-03 16:57:09,906 INFO L87 Difference]: Start difference. First operand 1288 states and 4297 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:10,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:57:10,934 INFO L93 Difference]: Finished difference Result 4322 states and 12488 transitions. [2021-05-03 16:57:10,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-03 16:57:10,935 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-03 16:57:10,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:57:10,943 INFO L225 Difference]: With dead ends: 4322 [2021-05-03 16:57:10,943 INFO L226 Difference]: Without dead ends: 4322 [2021-05-03 16:57:10,944 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 595.5ms TimeCoverageRelationStatistics Valid=757, Invalid=2783, Unknown=0, NotChecked=0, Total=3540 [2021-05-03 16:57:10,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4322 states. [2021-05-03 16:57:10,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4322 to 1090. [2021-05-03 16:57:10,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 1089 states have (on average 3.1799816345270893) internal successors, (3463), 1089 states have internal predecessors, (3463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:10,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 3463 transitions. [2021-05-03 16:57:10,994 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 3463 transitions. Word has length 30 [2021-05-03 16:57:10,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:57:10,994 INFO L480 AbstractCegarLoop]: Abstraction has 1090 states and 3463 transitions. [2021-05-03 16:57:10,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:10,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 3463 transitions. [2021-05-03 16:57:10,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:57:10,996 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:57:10,996 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:57:11,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-03 16:57:11,209 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:57:11,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:57:11,209 INFO L82 PathProgramCache]: Analyzing trace with hash -150600370, now seen corresponding path program 12 times [2021-05-03 16:57:11,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:57:11,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430668599] [2021-05-03 16:57:11,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:57:11,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:57:11,251 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:11,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430668599] [2021-05-03 16:57:11,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108978161] [2021-05-03 16:57:11,251 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 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 [2021-05-03 16:57:11,302 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:57:11,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:57:11,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 16:57:11,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:57:11,427 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:57:11,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:57:11,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 16:57:11,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180264720] [2021-05-03 16:57:11,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:57:11,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:57:11,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:57:11,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:57:11,429 INFO L87 Difference]: Start difference. First operand 1090 states and 3463 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:12,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:57:12,293 INFO L93 Difference]: Finished difference Result 3937 states and 11665 transitions. [2021-05-03 16:57:12,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-03 16:57:12,294 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-03 16:57:12,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:57:12,302 INFO L225 Difference]: With dead ends: 3937 [2021-05-03 16:57:12,302 INFO L226 Difference]: Without dead ends: 3861 [2021-05-03 16:57:12,303 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 520.2ms TimeCoverageRelationStatistics Valid=584, Invalid=2172, Unknown=0, NotChecked=0, Total=2756 [2021-05-03 16:57:12,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3861 states. [2021-05-03 16:57:12,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3861 to 1226. [2021-05-03 16:57:12,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 1225 states have (on average 3.244081632653061) internal successors, (3974), 1225 states have internal predecessors, (3974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:12,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 3974 transitions. [2021-05-03 16:57:12,358 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 3974 transitions. Word has length 30 [2021-05-03 16:57:12,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:57:12,358 INFO L480 AbstractCegarLoop]: Abstraction has 1226 states and 3974 transitions. [2021-05-03 16:57:12,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:12,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 3974 transitions. [2021-05-03 16:57:12,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:57:12,360 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:57:12,360 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:57:12,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:57:12,561 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:57:12,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:57:12,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1642605102, now seen corresponding path program 13 times [2021-05-03 16:57:12,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:57:12,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585685786] [2021-05-03 16:57:12,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:57:12,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:57:12,602 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:12,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585685786] [2021-05-03 16:57:12,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407815904] [2021-05-03 16:57:12,603 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 16:57:12,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:57:12,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 16:57:12,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:57:12,717 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:57:12,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:57:12,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 16:57:12,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024005480] [2021-05-03 16:57:12,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:57:12,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:57:12,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:57:12,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:57:12,718 INFO L87 Difference]: Start difference. First operand 1226 states and 3974 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:13,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:57:13,597 INFO L93 Difference]: Finished difference Result 3748 states and 11353 transitions. [2021-05-03 16:57:13,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-03 16:57:13,597 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-03 16:57:13,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:57:13,605 INFO L225 Difference]: With dead ends: 3748 [2021-05-03 16:57:13,605 INFO L226 Difference]: Without dead ends: 3728 [2021-05-03 16:57:13,605 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 522.9ms TimeCoverageRelationStatistics Valid=649, Invalid=2431, Unknown=0, NotChecked=0, Total=3080 [2021-05-03 16:57:13,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3728 states. [2021-05-03 16:57:13,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3728 to 1495. [2021-05-03 16:57:13,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1494 states have (on average 3.2402945113788486) internal successors, (4841), 1494 states have internal predecessors, (4841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:13,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 4841 transitions. [2021-05-03 16:57:13,649 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 4841 transitions. Word has length 30 [2021-05-03 16:57:13,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:57:13,649 INFO L480 AbstractCegarLoop]: Abstraction has 1495 states and 4841 transitions. [2021-05-03 16:57:13,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:13,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 4841 transitions. [2021-05-03 16:57:13,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:57:13,652 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:57:13,652 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:57:13,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-05-03 16:57:13,869 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:57:13,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:57:13,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1372095410, now seen corresponding path program 14 times [2021-05-03 16:57:13,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:57:13,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973919828] [2021-05-03 16:57:13,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:57:13,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:57:13,910 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:13,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973919828] [2021-05-03 16:57:13,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088134430] [2021-05-03 16:57:13,910 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 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 [2021-05-03 16:57:13,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:57:13,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:57:13,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 16:57:13,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:57:14,019 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:57:14,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:57:14,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 16:57:14,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058571304] [2021-05-03 16:57:14,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:57:14,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:57:14,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:57:14,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:57:14,020 INFO L87 Difference]: Start difference. First operand 1495 states and 4841 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:15,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:57:15,006 INFO L93 Difference]: Finished difference Result 4011 states and 11996 transitions. [2021-05-03 16:57:15,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-03 16:57:15,009 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-03 16:57:15,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:57:15,016 INFO L225 Difference]: With dead ends: 4011 [2021-05-03 16:57:15,016 INFO L226 Difference]: Without dead ends: 4011 [2021-05-03 16:57:15,016 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1494 ImplicationChecksByTransitivity, 641.7ms TimeCoverageRelationStatistics Valid=869, Invalid=3291, Unknown=0, NotChecked=0, Total=4160 [2021-05-03 16:57:15,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4011 states. [2021-05-03 16:57:15,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4011 to 1317. [2021-05-03 16:57:15,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1317 states, 1316 states have (on average 3.3054711246200608) internal successors, (4350), 1316 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:15,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1317 states to 1317 states and 4350 transitions. [2021-05-03 16:57:15,051 INFO L78 Accepts]: Start accepts. Automaton has 1317 states and 4350 transitions. Word has length 30 [2021-05-03 16:57:15,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:57:15,051 INFO L480 AbstractCegarLoop]: Abstraction has 1317 states and 4350 transitions. [2021-05-03 16:57:15,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:15,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1317 states and 4350 transitions. [2021-05-03 16:57:15,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:57:15,053 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:57:15,053 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:57:15,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:57:15,267 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:57:15,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:57:15,268 INFO L82 PathProgramCache]: Analyzing trace with hash -52824090, now seen corresponding path program 15 times [2021-05-03 16:57:15,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:57:15,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099031923] [2021-05-03 16:57:15,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:57:15,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:57:15,310 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:15,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099031923] [2021-05-03 16:57:15,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952024637] [2021-05-03 16:57:15,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 16:57:15,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 16:57:15,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:57:15,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 16:57:15,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:57:15,486 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:15,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:57:15,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-05-03 16:57:15,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88599700] [2021-05-03 16:57:15,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:57:15,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:57:15,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:57:15,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:57:15,488 INFO L87 Difference]: Start difference. First operand 1317 states and 4350 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:16,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:57:16,793 INFO L93 Difference]: Finished difference Result 5592 states and 17120 transitions. [2021-05-03 16:57:16,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-03 16:57:16,793 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-03 16:57:16,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:57:16,805 INFO L225 Difference]: With dead ends: 5592 [2021-05-03 16:57:16,805 INFO L226 Difference]: Without dead ends: 5592 [2021-05-03 16:57:16,806 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1796 ImplicationChecksByTransitivity, 813.4ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-05-03 16:57:16,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5592 states. [2021-05-03 16:57:16,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5592 to 1593. [2021-05-03 16:57:16,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1592 states have (on average 3.4233668341708543) internal successors, (5450), 1592 states have internal predecessors, (5450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:16,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 5450 transitions. [2021-05-03 16:57:16,865 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 5450 transitions. Word has length 30 [2021-05-03 16:57:16,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:57:16,866 INFO L480 AbstractCegarLoop]: Abstraction has 1593 states and 5450 transitions. [2021-05-03 16:57:16,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:16,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 5450 transitions. [2021-05-03 16:57:16,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:57:16,869 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:57:16,869 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:57:17,069 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-03 16:57:17,070 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:57:17,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:57:17,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1172821128, now seen corresponding path program 16 times [2021-05-03 16:57:17,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:57:17,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980358770] [2021-05-03 16:57:17,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:57:17,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:57:17,130 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:17,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980358770] [2021-05-03 16:57:17,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469619477] [2021-05-03 16:57:17,131 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 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 [2021-05-03 16:57:17,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:57:17,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:57:17,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 16:57:17,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:57:17,256 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:17,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:57:17,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-05-03 16:57:17,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462866683] [2021-05-03 16:57:17,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 16:57:17,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:57:17,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 16:57:17,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:57:17,257 INFO L87 Difference]: Start difference. First operand 1593 states and 5450 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:18,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:57:18,263 INFO L93 Difference]: Finished difference Result 5179 states and 15726 transitions. [2021-05-03 16:57:18,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-03 16:57:18,264 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-03 16:57:18,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:57:18,274 INFO L225 Difference]: With dead ends: 5179 [2021-05-03 16:57:18,275 INFO L226 Difference]: Without dead ends: 5159 [2021-05-03 16:57:18,275 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 590.9ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-05-03 16:57:18,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5159 states. [2021-05-03 16:57:18,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5159 to 1603. [2021-05-03 16:57:18,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1602 states have (on average 3.4213483146067416) internal successors, (5481), 1602 states have internal predecessors, (5481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:18,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 5481 transitions. [2021-05-03 16:57:18,331 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 5481 transitions. Word has length 30 [2021-05-03 16:57:18,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:57:18,331 INFO L480 AbstractCegarLoop]: Abstraction has 1603 states and 5481 transitions. [2021-05-03 16:57:18,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:18,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 5481 transitions. [2021-05-03 16:57:18,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:57:18,334 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:57:18,334 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:57:18,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-03 16:57:18,549 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:57:18,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:57:18,549 INFO L82 PathProgramCache]: Analyzing trace with hash -902311436, now seen corresponding path program 17 times [2021-05-03 16:57:18,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:57:18,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877725879] [2021-05-03 16:57:18,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:57:18,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:57:18,624 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:18,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877725879] [2021-05-03 16:57:18,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142465516] [2021-05-03 16:57:18,624 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 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 [2021-05-03 16:57:18,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:57:18,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:57:18,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 16:57:18,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:57:18,780 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:18,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:57:18,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-05-03 16:57:18,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550317747] [2021-05-03 16:57:18,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 16:57:18,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:57:18,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 16:57:18,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:57:18,782 INFO L87 Difference]: Start difference. First operand 1603 states and 5481 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:19,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:57:19,934 INFO L93 Difference]: Finished difference Result 5490 states and 16477 transitions. [2021-05-03 16:57:19,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-03 16:57:19,935 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-03 16:57:19,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:57:19,945 INFO L225 Difference]: With dead ends: 5490 [2021-05-03 16:57:19,945 INFO L226 Difference]: Without dead ends: 5490 [2021-05-03 16:57:19,946 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1501 ImplicationChecksByTransitivity, 729.2ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-05-03 16:57:19,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5490 states. [2021-05-03 16:57:19,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5490 to 1592. [2021-05-03 16:57:19,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1592 states, 1591 states have (on average 3.4223758642363293) internal successors, (5445), 1591 states have internal predecessors, (5445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:20,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 5445 transitions. [2021-05-03 16:57:20,004 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 5445 transitions. Word has length 30 [2021-05-03 16:57:20,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:57:20,004 INFO L480 AbstractCegarLoop]: Abstraction has 1592 states and 5445 transitions. [2021-05-03 16:57:20,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:20,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 5445 transitions. [2021-05-03 16:57:20,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:57:20,007 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:57:20,007 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:57:20,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-03 16:57:20,213 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:57:20,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:57:20,213 INFO L82 PathProgramCache]: Analyzing trace with hash -317283250, now seen corresponding path program 18 times [2021-05-03 16:57:20,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:57:20,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661987521] [2021-05-03 16:57:20,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:57:20,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:57:20,251 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:20,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661987521] [2021-05-03 16:57:20,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100651550] [2021-05-03 16:57:20,251 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 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 [2021-05-03 16:57:20,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:57:20,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:57:20,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 16:57:20,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:57:20,404 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:20,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:57:20,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-05-03 16:57:20,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187911487] [2021-05-03 16:57:20,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 16:57:20,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:57:20,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 16:57:20,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-05-03 16:57:20,406 INFO L87 Difference]: Start difference. First operand 1592 states and 5445 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:21,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:57:21,148 INFO L93 Difference]: Finished difference Result 4892 states and 15553 transitions. [2021-05-03 16:57:21,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-03 16:57:21,148 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-03 16:57:21,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:57:21,157 INFO L225 Difference]: With dead ends: 4892 [2021-05-03 16:57:21,157 INFO L226 Difference]: Without dead ends: 4844 [2021-05-03 16:57:21,158 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 428.7ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 16:57:21,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4844 states. [2021-05-03 16:57:21,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4844 to 1720. [2021-05-03 16:57:21,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1720 states, 1719 states have (on average 3.4543339150668992) internal successors, (5938), 1719 states have internal predecessors, (5938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:21,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1720 states to 1720 states and 5938 transitions. [2021-05-03 16:57:21,209 INFO L78 Accepts]: Start accepts. Automaton has 1720 states and 5938 transitions. Word has length 30 [2021-05-03 16:57:21,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:57:21,209 INFO L480 AbstractCegarLoop]: Abstraction has 1720 states and 5938 transitions. [2021-05-03 16:57:21,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:21,209 INFO L276 IsEmpty]: Start isEmpty. Operand 1720 states and 5938 transitions. [2021-05-03 16:57:21,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:57:21,212 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:57:21,212 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:57:21,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-03 16:57:21,413 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:57:21,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:57:21,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1809287982, now seen corresponding path program 19 times [2021-05-03 16:57:21,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:57:21,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933697039] [2021-05-03 16:57:21,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:57:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:57:21,453 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:21,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933697039] [2021-05-03 16:57:21,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518430778] [2021-05-03 16:57:21,453 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 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 [2021-05-03 16:57:21,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:57:21,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 16:57:21,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:57:21,605 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:21,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:57:21,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-05-03 16:57:21,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026954408] [2021-05-03 16:57:21,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 16:57:21,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:57:21,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 16:57:21,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-05-03 16:57:21,607 INFO L87 Difference]: Start difference. First operand 1720 states and 5938 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:22,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:57:22,698 INFO L93 Difference]: Finished difference Result 5688 states and 17607 transitions. [2021-05-03 16:57:22,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-03 16:57:22,699 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-03 16:57:22,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:57:22,709 INFO L225 Difference]: With dead ends: 5688 [2021-05-03 16:57:22,709 INFO L226 Difference]: Without dead ends: 5672 [2021-05-03 16:57:22,710 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 650.0ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-05-03 16:57:22,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5672 states. [2021-05-03 16:57:22,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5672 to 1975. [2021-05-03 16:57:22,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1975 states, 1974 states have (on average 3.498480243161094) internal successors, (6906), 1974 states have internal predecessors, (6906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:22,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 6906 transitions. [2021-05-03 16:57:22,773 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 6906 transitions. Word has length 30 [2021-05-03 16:57:22,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:57:22,773 INFO L480 AbstractCegarLoop]: Abstraction has 1975 states and 6906 transitions. [2021-05-03 16:57:22,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:22,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 6906 transitions. [2021-05-03 16:57:22,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:57:22,777 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:57:22,777 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:57:22,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-03 16:57:22,993 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:57:22,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:57:22,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1538778290, now seen corresponding path program 20 times [2021-05-03 16:57:22,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:57:22,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099402814] [2021-05-03 16:57:22,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:57:22,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:57:23,045 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:23,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099402814] [2021-05-03 16:57:23,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816994685] [2021-05-03 16:57:23,045 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 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 [2021-05-03 16:57:23,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:57:23,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:57:23,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 16:57:23,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:57:23,182 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:23,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:57:23,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-05-03 16:57:23,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357311141] [2021-05-03 16:57:23,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 16:57:23,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:57:23,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 16:57:23,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-05-03 16:57:23,184 INFO L87 Difference]: Start difference. First operand 1975 states and 6906 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:24,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:57:24,361 INFO L93 Difference]: Finished difference Result 5943 states and 18242 transitions. [2021-05-03 16:57:24,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-03 16:57:24,362 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-03 16:57:24,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:57:24,373 INFO L225 Difference]: With dead ends: 5943 [2021-05-03 16:57:24,373 INFO L226 Difference]: Without dead ends: 5943 [2021-05-03 16:57:24,374 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 755.6ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-05-03 16:57:24,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5943 states. [2021-05-03 16:57:24,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5943 to 1883. [2021-05-03 16:57:24,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1883 states, 1882 states have (on average 3.524973432518597) internal successors, (6634), 1882 states have internal predecessors, (6634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:24,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1883 states to 1883 states and 6634 transitions. [2021-05-03 16:57:24,439 INFO L78 Accepts]: Start accepts. Automaton has 1883 states and 6634 transitions. Word has length 30 [2021-05-03 16:57:24,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:57:24,439 INFO L480 AbstractCegarLoop]: Abstraction has 1883 states and 6634 transitions. [2021-05-03 16:57:24,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:24,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1883 states and 6634 transitions. [2021-05-03 16:57:24,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:57:24,443 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:57:24,443 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:57:24,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-03 16:57:24,644 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:57:24,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:57:24,644 INFO L82 PathProgramCache]: Analyzing trace with hash 729705298, now seen corresponding path program 21 times [2021-05-03 16:57:24,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:57:24,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702146736] [2021-05-03 16:57:24,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:57:24,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:57:24,721 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:24,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702146736] [2021-05-03 16:57:24,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356233473] [2021-05-03 16:57:24,721 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 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 [2021-05-03 16:57:24,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 16:57:24,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:57:24,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 16:57:24,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:57:24,837 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:24,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:57:24,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-05-03 16:57:24,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434681960] [2021-05-03 16:57:24,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 16:57:24,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:57:24,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 16:57:24,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-05-03 16:57:24,838 INFO L87 Difference]: Start difference. First operand 1883 states and 6634 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2021-05-03 16:57:25,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:57:25,894 INFO L93 Difference]: Finished difference Result 5285 states and 16489 transitions. [2021-05-03 16:57:25,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-03 16:57:25,895 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-03 16:57:25,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:57:25,905 INFO L225 Difference]: With dead ends: 5285 [2021-05-03 16:57:25,905 INFO L226 Difference]: Without dead ends: 5197 [2021-05-03 16:57:25,906 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 684.3ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-05-03 16:57:25,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5197 states. [2021-05-03 16:57:25,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5197 to 1921. [2021-05-03 16:57:25,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 3.5078125) internal successors, (6735), 1920 states have internal predecessors, (6735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:25,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 6735 transitions. [2021-05-03 16:57:25,969 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 6735 transitions. Word has length 30 [2021-05-03 16:57:25,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:57:25,969 INFO L480 AbstractCegarLoop]: Abstraction has 1921 states and 6735 transitions. [2021-05-03 16:57:25,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2021-05-03 16:57:25,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 6735 transitions. [2021-05-03 16:57:25,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:57:25,973 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:57:25,973 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:57:26,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-03 16:57:26,174 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:57:26,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:57:26,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1432234710, now seen corresponding path program 22 times [2021-05-03 16:57:26,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:57:26,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116742800] [2021-05-03 16:57:26,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:57:26,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:57:26,224 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:26,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116742800] [2021-05-03 16:57:26,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735992861] [2021-05-03 16:57:26,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 16:57:26,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:57:26,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:57:26,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 16:57:26,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:57:26,345 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:26,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:57:26,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-05-03 16:57:26,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837702851] [2021-05-03 16:57:26,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 16:57:26,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:57:26,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 16:57:26,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-05-03 16:57:26,346 INFO L87 Difference]: Start difference. First operand 1921 states and 6735 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2021-05-03 16:57:27,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:57:27,532 INFO L93 Difference]: Finished difference Result 5368 states and 16837 transitions. [2021-05-03 16:57:27,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-03 16:57:27,533 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-03 16:57:27,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:57:27,544 INFO L225 Difference]: With dead ends: 5368 [2021-05-03 16:57:27,545 INFO L226 Difference]: Without dead ends: 5320 [2021-05-03 16:57:27,546 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 755.7ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-05-03 16:57:27,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5320 states. [2021-05-03 16:57:27,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5320 to 2167. [2021-05-03 16:57:27,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2166 states have (on average 3.4247460757156047) internal successors, (7418), 2166 states have internal predecessors, (7418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:27,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 7418 transitions. [2021-05-03 16:57:27,619 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 7418 transitions. Word has length 30 [2021-05-03 16:57:27,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:57:27,620 INFO L480 AbstractCegarLoop]: Abstraction has 2167 states and 7418 transitions. [2021-05-03 16:57:27,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2021-05-03 16:57:27,620 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 7418 transitions. [2021-05-03 16:57:27,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:57:27,624 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:57:27,624 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:57:27,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-03 16:57:27,833 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:57:27,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:57:27,833 INFO L82 PathProgramCache]: Analyzing trace with hash -2092961066, now seen corresponding path program 23 times [2021-05-03 16:57:27,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:57:27,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173079424] [2021-05-03 16:57:27,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:57:27,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:57:27,881 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:27,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173079424] [2021-05-03 16:57:27,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110123447] [2021-05-03 16:57:27,881 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 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 [2021-05-03 16:57:27,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:57:27,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:57:27,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 16:57:27,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:57:28,000 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:28,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:57:28,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-05-03 16:57:28,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844979009] [2021-05-03 16:57:28,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 16:57:28,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:57:28,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 16:57:28,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-05-03 16:57:28,002 INFO L87 Difference]: Start difference. First operand 2167 states and 7418 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2021-05-03 16:57:29,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:57:29,380 INFO L93 Difference]: Finished difference Result 6070 states and 18667 transitions. [2021-05-03 16:57:29,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-03 16:57:29,381 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-03 16:57:29,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:57:29,392 INFO L225 Difference]: With dead ends: 6070 [2021-05-03 16:57:29,392 INFO L226 Difference]: Without dead ends: 6058 [2021-05-03 16:57:29,393 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1865 ImplicationChecksByTransitivity, 841.4ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-05-03 16:57:29,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6058 states. [2021-05-03 16:57:29,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6058 to 2443. [2021-05-03 16:57:29,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2443 states, 2442 states have (on average 3.3562653562653564) internal successors, (8196), 2442 states have internal predecessors, (8196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:29,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2443 states to 2443 states and 8196 transitions. [2021-05-03 16:57:29,474 INFO L78 Accepts]: Start accepts. Automaton has 2443 states and 8196 transitions. Word has length 30 [2021-05-03 16:57:29,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:57:29,474 INFO L480 AbstractCegarLoop]: Abstraction has 2443 states and 8196 transitions. [2021-05-03 16:57:29,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2021-05-03 16:57:29,474 INFO L276 IsEmpty]: Start isEmpty. Operand 2443 states and 8196 transitions. [2021-05-03 16:57:29,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:57:29,478 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:57:29,478 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:57:29,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:57:29,679 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:57:29,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:57:29,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1822451374, now seen corresponding path program 24 times [2021-05-03 16:57:29,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:57:29,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892471078] [2021-05-03 16:57:29,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:57:29,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:57:29,724 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:29,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892471078] [2021-05-03 16:57:29,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527515885] [2021-05-03 16:57:29,725 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 16:57:29,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:57:29,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:57:29,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 16:57:29,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:57:29,873 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:29,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:57:29,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-05-03 16:57:29,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049039103] [2021-05-03 16:57:29,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 16:57:29,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:57:29,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 16:57:29,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-05-03 16:57:29,874 INFO L87 Difference]: Start difference. First operand 2443 states and 8196 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2021-05-03 16:57:31,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:57:31,539 INFO L93 Difference]: Finished difference Result 6469 states and 19686 transitions. [2021-05-03 16:57:31,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-03 16:57:31,539 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-03 16:57:31,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:57:31,552 INFO L225 Difference]: With dead ends: 6469 [2021-05-03 16:57:31,552 INFO L226 Difference]: Without dead ends: 6469 [2021-05-03 16:57:31,553 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2848 ImplicationChecksByTransitivity, 1091.7ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-05-03 16:57:31,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6469 states. [2021-05-03 16:57:31,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6469 to 2281. [2021-05-03 16:57:31,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2281 states, 2280 states have (on average 3.395175438596491) internal successors, (7741), 2280 states have internal predecessors, (7741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:31,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2281 states to 2281 states and 7741 transitions. [2021-05-03 16:57:31,637 INFO L78 Accepts]: Start accepts. Automaton has 2281 states and 7741 transitions. Word has length 30 [2021-05-03 16:57:31,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:57:31,637 INFO L480 AbstractCegarLoop]: Abstraction has 2281 states and 7741 transitions. [2021-05-03 16:57:31,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2021-05-03 16:57:31,638 INFO L276 IsEmpty]: Start isEmpty. Operand 2281 states and 7741 transitions. [2021-05-03 16:57:31,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 16:57:31,641 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:57:31,641 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:57:31,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:57:31,852 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:57:31,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:57:31,852 INFO L82 PathProgramCache]: Analyzing trace with hash -605801532, now seen corresponding path program 25 times [2021-05-03 16:57:31,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:57:31,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385550326] [2021-05-03 16:57:31,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:57:31,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:57:31,928 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:31,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385550326] [2021-05-03 16:57:31,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497867227] [2021-05-03 16:57:31,928 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 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 [2021-05-03 16:57:31,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:57:31,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 16:57:31,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:57:32,101 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:32,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:57:32,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 16:57:32,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142233075] [2021-05-03 16:57:32,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:57:32,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:57:32,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:57:32,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:57:32,102 INFO L87 Difference]: Start difference. First operand 2281 states and 7741 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:33,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:57:33,500 INFO L93 Difference]: Finished difference Result 9682 states and 31073 transitions. [2021-05-03 16:57:33,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-03 16:57:33,500 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 16:57:33,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:57:33,522 INFO L225 Difference]: With dead ends: 9682 [2021-05-03 16:57:33,522 INFO L226 Difference]: Without dead ends: 9682 [2021-05-03 16:57:33,523 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 791.7ms TimeCoverageRelationStatistics Valid=922, Invalid=2984, Unknown=0, NotChecked=0, Total=3906 [2021-05-03 16:57:33,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9682 states. [2021-05-03 16:57:33,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9682 to 2995. [2021-05-03 16:57:33,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2995 states, 2994 states have (on average 3.5848363393453573) internal successors, (10733), 2994 states have internal predecessors, (10733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:33,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2995 states to 2995 states and 10733 transitions. [2021-05-03 16:57:33,647 INFO L78 Accepts]: Start accepts. Automaton has 2995 states and 10733 transitions. Word has length 32 [2021-05-03 16:57:33,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:57:33,647 INFO L480 AbstractCegarLoop]: Abstraction has 2995 states and 10733 transitions. [2021-05-03 16:57:33,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:33,647 INFO L276 IsEmpty]: Start isEmpty. Operand 2995 states and 10733 transitions. [2021-05-03 16:57:33,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 16:57:33,653 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:57:33,653 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:57:33,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-05-03 16:57:33,861 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:57:33,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:57:33,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1297197704, now seen corresponding path program 17 times [2021-05-03 16:57:33,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:57:33,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995246988] [2021-05-03 16:57:33,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:57:33,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:57:33,928 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:33,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995246988] [2021-05-03 16:57:33,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828433596] [2021-05-03 16:57:33,929 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 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 [2021-05-03 16:57:33,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 16:57:33,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:57:33,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 16:57:33,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:57:34,146 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:34,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:57:34,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 16:57:34,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351003756] [2021-05-03 16:57:34,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:57:34,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:57:34,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:57:34,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:57:34,147 INFO L87 Difference]: Start difference. First operand 2995 states and 10733 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:35,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:57:35,773 INFO L93 Difference]: Finished difference Result 8824 states and 28026 transitions. [2021-05-03 16:57:35,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-03 16:57:35,774 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 16:57:35,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:57:35,793 INFO L225 Difference]: With dead ends: 8824 [2021-05-03 16:57:35,794 INFO L226 Difference]: Without dead ends: 8824 [2021-05-03 16:57:35,794 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 975.0ms TimeCoverageRelationStatistics Valid=918, Invalid=3114, Unknown=0, NotChecked=0, Total=4032 [2021-05-03 16:57:35,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8824 states. [2021-05-03 16:57:35,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8824 to 2986. [2021-05-03 16:57:35,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2986 states, 2985 states have (on average 3.5728643216080402) internal successors, (10665), 2985 states have internal predecessors, (10665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:35,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2986 states to 2986 states and 10665 transitions. [2021-05-03 16:57:35,910 INFO L78 Accepts]: Start accepts. Automaton has 2986 states and 10665 transitions. Word has length 32 [2021-05-03 16:57:35,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:57:35,910 INFO L480 AbstractCegarLoop]: Abstraction has 2986 states and 10665 transitions. [2021-05-03 16:57:35,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:35,910 INFO L276 IsEmpty]: Start isEmpty. Operand 2986 states and 10665 transitions. [2021-05-03 16:57:35,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 16:57:35,916 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:57:35,916 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:57:36,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:57:36,117 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:57:36,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:57:36,118 INFO L82 PathProgramCache]: Analyzing trace with hash 600098510, now seen corresponding path program 26 times [2021-05-03 16:57:36,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:57:36,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299520793] [2021-05-03 16:57:36,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:57:36,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:57:36,230 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:36,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299520793] [2021-05-03 16:57:36,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497297875] [2021-05-03 16:57:36,230 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:57:36,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:57:36,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:57:36,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 16:57:36,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:57:36,403 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:57:36,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:57:36,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 16:57:36,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586364203] [2021-05-03 16:57:36,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 16:57:36,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:57:36,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 16:57:36,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-03 16:57:36,404 INFO L87 Difference]: Start difference. First operand 2986 states and 10665 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:38,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:57:38,556 INFO L93 Difference]: Finished difference Result 8875 states and 28153 transitions. [2021-05-03 16:57:38,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-03 16:57:38,557 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 16:57:38,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:57:38,576 INFO L225 Difference]: With dead ends: 8875 [2021-05-03 16:57:38,577 INFO L226 Difference]: Without dead ends: 8867 [2021-05-03 16:57:38,578 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2807 ImplicationChecksByTransitivity, 1258.2ms TimeCoverageRelationStatistics Valid=1463, Invalid=6193, Unknown=0, NotChecked=0, Total=7656 [2021-05-03 16:57:38,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8867 states. [2021-05-03 16:57:38,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8867 to 3090. [2021-05-03 16:57:38,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3090 states, 3089 states have (on average 3.5995467788928455) internal successors, (11119), 3089 states have internal predecessors, (11119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:38,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3090 states to 3090 states and 11119 transitions. [2021-05-03 16:57:38,706 INFO L78 Accepts]: Start accepts. Automaton has 3090 states and 11119 transitions. Word has length 32 [2021-05-03 16:57:38,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:57:38,707 INFO L480 AbstractCegarLoop]: Abstraction has 3090 states and 11119 transitions. [2021-05-03 16:57:38,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:38,707 INFO L276 IsEmpty]: Start isEmpty. Operand 3090 states and 11119 transitions. [2021-05-03 16:57:38,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 16:57:38,712 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:57:38,712 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:57:38,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:57:38,913 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:57:38,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:57:38,913 INFO L82 PathProgramCache]: Analyzing trace with hash 2007937660, now seen corresponding path program 18 times [2021-05-03 16:57:38,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:57:38,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335072175] [2021-05-03 16:57:38,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:57:38,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:57:38,971 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:38,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335072175] [2021-05-03 16:57:38,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011342531] [2021-05-03 16:57:38,972 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:57:38,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 16:57:38,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:57:38,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 16:57:38,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:57:39,137 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:57:39,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:57:39,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 16:57:39,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755943089] [2021-05-03 16:57:39,138 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 16:57:39,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:57:39,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 16:57:39,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-05-03 16:57:39,139 INFO L87 Difference]: Start difference. First operand 3090 states and 11119 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:41,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:57:41,449 INFO L93 Difference]: Finished difference Result 8679 states and 27970 transitions. [2021-05-03 16:57:41,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-05-03 16:57:41,461 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 16:57:41,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:57:41,484 INFO L225 Difference]: With dead ends: 8679 [2021-05-03 16:57:41,484 INFO L226 Difference]: Without dead ends: 8679 [2021-05-03 16:57:41,485 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3112 ImplicationChecksByTransitivity, 1407.5ms TimeCoverageRelationStatistics Valid=1649, Invalid=7281, Unknown=0, NotChecked=0, Total=8930 [2021-05-03 16:57:41,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8679 states. [2021-05-03 16:57:41,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8679 to 3210. [2021-05-03 16:57:41,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3210 states, 3209 states have (on average 3.630414459333126) internal successors, (11650), 3209 states have internal predecessors, (11650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:41,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3210 states to 3210 states and 11650 transitions. [2021-05-03 16:57:41,605 INFO L78 Accepts]: Start accepts. Automaton has 3210 states and 11650 transitions. Word has length 32 [2021-05-03 16:57:41,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:57:41,605 INFO L480 AbstractCegarLoop]: Abstraction has 3210 states and 11650 transitions. [2021-05-03 16:57:41,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:41,606 INFO L276 IsEmpty]: Start isEmpty. Operand 3210 states and 11650 transitions. [2021-05-03 16:57:41,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 16:57:41,612 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:57:41,612 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:57:41,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-03 16:57:41,823 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:57:41,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:57:41,823 INFO L82 PathProgramCache]: Analyzing trace with hash -433008152, now seen corresponding path program 27 times [2021-05-03 16:57:41,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:57:41,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534046092] [2021-05-03 16:57:41,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:57:41,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:57:41,884 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:41,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534046092] [2021-05-03 16:57:41,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108511829] [2021-05-03 16:57:41,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:57:41,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 16:57:41,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:57:41,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 16:57:41,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:57:42,084 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:42,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:57:42,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-05-03 16:57:42,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012059205] [2021-05-03 16:57:42,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:57:42,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:57:42,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:57:42,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:57:42,085 INFO L87 Difference]: Start difference. First operand 3210 states and 11650 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:43,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:57:43,527 INFO L93 Difference]: Finished difference Result 9135 states and 29852 transitions. [2021-05-03 16:57:43,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-03 16:57:43,528 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 16:57:43,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:57:43,550 INFO L225 Difference]: With dead ends: 9135 [2021-05-03 16:57:43,550 INFO L226 Difference]: Without dead ends: 9083 [2021-05-03 16:57:43,551 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 804.3ms TimeCoverageRelationStatistics Valid=1064, Invalid=3906, Unknown=0, NotChecked=0, Total=4970 [2021-05-03 16:57:43,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9083 states. [2021-05-03 16:57:43,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9083 to 3428. [2021-05-03 16:57:43,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3427 states have (on average 3.6778523489932886) internal successors, (12604), 3427 states have internal predecessors, (12604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:43,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 12604 transitions. [2021-05-03 16:57:43,698 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 12604 transitions. Word has length 32 [2021-05-03 16:57:43,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:57:43,698 INFO L480 AbstractCegarLoop]: Abstraction has 3428 states and 12604 transitions. [2021-05-03 16:57:43,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:43,698 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 12604 transitions. [2021-05-03 16:57:43,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 16:57:43,705 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:57:43,705 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:57:43,906 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-03 16:57:43,906 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:57:43,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:57:43,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1654503192, now seen corresponding path program 28 times [2021-05-03 16:57:43,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:57:43,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989257201] [2021-05-03 16:57:43,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:57:43,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:57:43,969 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:43,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989257201] [2021-05-03 16:57:43,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007340660] [2021-05-03 16:57:43,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:57:43,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:57:43,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:57:43,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 16:57:43,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:57:44,132 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:44,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:57:44,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-05-03 16:57:44,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546306944] [2021-05-03 16:57:44,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:57:44,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:57:44,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:57:44,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:57:44,133 INFO L87 Difference]: Start difference. First operand 3428 states and 12604 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:45,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:57:45,124 INFO L93 Difference]: Finished difference Result 9077 states and 29720 transitions. [2021-05-03 16:57:45,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-03 16:57:45,125 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 16:57:45,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:57:45,150 INFO L225 Difference]: With dead ends: 9077 [2021-05-03 16:57:45,151 INFO L226 Difference]: Without dead ends: 9077 [2021-05-03 16:57:45,152 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 516.9ms TimeCoverageRelationStatistics Valid=572, Invalid=1590, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 16:57:45,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9077 states. [2021-05-03 16:57:45,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9077 to 3545. [2021-05-03 16:57:45,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3545 states, 3544 states have (on average 3.660270880361174) internal successors, (12972), 3544 states have internal predecessors, (12972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:45,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3545 states to 3545 states and 12972 transitions. [2021-05-03 16:57:45,292 INFO L78 Accepts]: Start accepts. Automaton has 3545 states and 12972 transitions. Word has length 32 [2021-05-03 16:57:45,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:57:45,292 INFO L480 AbstractCegarLoop]: Abstraction has 3545 states and 12972 transitions. [2021-05-03 16:57:45,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:45,293 INFO L276 IsEmpty]: Start isEmpty. Operand 3545 states and 12972 transitions. [2021-05-03 16:57:45,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 16:57:45,303 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:57:45,303 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:57:45,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-03 16:57:45,517 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:57:45,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:57:45,517 INFO L82 PathProgramCache]: Analyzing trace with hash 952838794, now seen corresponding path program 19 times [2021-05-03 16:57:45,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:57:45,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667362547] [2021-05-03 16:57:45,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:57:45,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:57:45,564 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 16:57:45,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667362547] [2021-05-03 16:57:45,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525784194] [2021-05-03 16:57:45,565 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:57:45,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:57:45,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 16:57:45,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:57:45,729 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:57:45,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:57:45,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-05-03 16:57:45,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047259766] [2021-05-03 16:57:45,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:57:45,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:57:45,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:57:45,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:57:45,749 INFO L87 Difference]: Start difference. First operand 3545 states and 12972 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:47,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:57:47,450 INFO L93 Difference]: Finished difference Result 8376 states and 28279 transitions. [2021-05-03 16:57:47,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-03 16:57:47,451 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 16:57:47,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:57:47,471 INFO L225 Difference]: With dead ends: 8376 [2021-05-03 16:57:47,471 INFO L226 Difference]: Without dead ends: 8376 [2021-05-03 16:57:47,472 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1582 ImplicationChecksByTransitivity, 910.9ms TimeCoverageRelationStatistics Valid=870, Invalid=3822, Unknown=0, NotChecked=0, Total=4692 [2021-05-03 16:57:47,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8376 states. [2021-05-03 16:57:47,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8376 to 3543. [2021-05-03 16:57:47,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3543 states, 3542 states have (on average 3.6620553359683794) internal successors, (12971), 3542 states have internal predecessors, (12971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:47,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3543 states to 3543 states and 12971 transitions. [2021-05-03 16:57:47,598 INFO L78 Accepts]: Start accepts. Automaton has 3543 states and 12971 transitions. Word has length 32 [2021-05-03 16:57:47,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:57:47,598 INFO L480 AbstractCegarLoop]: Abstraction has 3543 states and 12971 transitions. [2021-05-03 16:57:47,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:47,598 INFO L276 IsEmpty]: Start isEmpty. Operand 3543 states and 12971 transitions. [2021-05-03 16:57:47,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 16:57:47,605 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:57:47,605 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:57:47,805 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:57:47,806 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:57:47,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:57:47,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1653605764, now seen corresponding path program 20 times [2021-05-03 16:57:47,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:57:47,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537173714] [2021-05-03 16:57:47,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:57:47,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:57:47,864 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:47,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537173714] [2021-05-03 16:57:47,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494829899] [2021-05-03 16:57:47,864 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:57:47,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:57:47,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:57:47,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 16:57:47,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:57:48,086 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:57:48,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:57:48,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 16:57:48,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111617706] [2021-05-03 16:57:48,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:57:48,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:57:48,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:57:48,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:57:48,087 INFO L87 Difference]: Start difference. First operand 3543 states and 12971 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:50,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:57:50,389 INFO L93 Difference]: Finished difference Result 9833 states and 31971 transitions. [2021-05-03 16:57:50,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-05-03 16:57:50,390 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 16:57:50,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:57:50,411 INFO L225 Difference]: With dead ends: 9833 [2021-05-03 16:57:50,411 INFO L226 Difference]: Without dead ends: 9833 [2021-05-03 16:57:50,412 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3611 ImplicationChecksByTransitivity, 1507.0ms TimeCoverageRelationStatistics Valid=2012, Invalid=7690, Unknown=0, NotChecked=0, Total=9702 [2021-05-03 16:57:50,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9833 states. [2021-05-03 16:57:50,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9833 to 3619. [2021-05-03 16:57:50,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3619 states, 3618 states have (on average 3.646489773355445) internal successors, (13193), 3618 states have internal predecessors, (13193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:50,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3619 states to 3619 states and 13193 transitions. [2021-05-03 16:57:50,539 INFO L78 Accepts]: Start accepts. Automaton has 3619 states and 13193 transitions. Word has length 32 [2021-05-03 16:57:50,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:57:50,539 INFO L480 AbstractCegarLoop]: Abstraction has 3619 states and 13193 transitions. [2021-05-03 16:57:50,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:50,539 INFO L276 IsEmpty]: Start isEmpty. Operand 3619 states and 13193 transitions. [2021-05-03 16:57:50,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 16:57:50,545 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:57:50,545 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:57:50,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-03 16:57:50,746 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:57:50,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:57:50,746 INFO L82 PathProgramCache]: Analyzing trace with hash 956690446, now seen corresponding path program 21 times [2021-05-03 16:57:50,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:57:50,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586726680] [2021-05-03 16:57:50,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:57:50,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:57:50,800 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:50,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586726680] [2021-05-03 16:57:50,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578317956] [2021-05-03 16:57:50,800 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:57:50,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 16:57:50,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:57:50,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 16:57:50,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:57:50,963 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:50,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:57:50,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-05-03 16:57:50,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655927309] [2021-05-03 16:57:50,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 16:57:50,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:57:50,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 16:57:50,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-05-03 16:57:50,964 INFO L87 Difference]: Start difference. First operand 3619 states and 13193 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:52,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:57:52,623 INFO L93 Difference]: Finished difference Result 9122 states and 30000 transitions. [2021-05-03 16:57:52,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-03 16:57:52,623 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 16:57:52,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:57:52,645 INFO L225 Difference]: With dead ends: 9122 [2021-05-03 16:57:52,645 INFO L226 Difference]: Without dead ends: 9078 [2021-05-03 16:57:52,646 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1936 ImplicationChecksByTransitivity, 992.3ms TimeCoverageRelationStatistics Valid=1274, Invalid=4578, Unknown=0, NotChecked=0, Total=5852 [2021-05-03 16:57:52,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9078 states. [2021-05-03 16:57:52,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9078 to 3617. [2021-05-03 16:57:52,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3617 states, 3616 states have (on average 3.64712389380531) internal successors, (13188), 3616 states have internal predecessors, (13188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:52,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3617 states to 3617 states and 13188 transitions. [2021-05-03 16:57:52,769 INFO L78 Accepts]: Start accepts. Automaton has 3617 states and 13188 transitions. Word has length 32 [2021-05-03 16:57:52,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:57:52,769 INFO L480 AbstractCegarLoop]: Abstraction has 3617 states and 13188 transitions. [2021-05-03 16:57:52,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:52,769 INFO L276 IsEmpty]: Start isEmpty. Operand 3617 states and 13188 transitions. [2021-05-03 16:57:52,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 16:57:52,775 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:57:52,775 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:57:52,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:57:52,976 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:57:52,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:57:52,976 INFO L82 PathProgramCache]: Analyzing trace with hash 530340736, now seen corresponding path program 22 times [2021-05-03 16:57:52,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:57:52,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818464748] [2021-05-03 16:57:52,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:57:52,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:57:53,052 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:57:53,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818464748] [2021-05-03 16:57:53,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429794133] [2021-05-03 16:57:53,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:57:53,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:57:53,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:57:53,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 16:57:53,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:57:53,250 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:53,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:57:53,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-05-03 16:57:53,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412329537] [2021-05-03 16:57:53,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 16:57:53,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:57:53,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 16:57:53,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-05-03 16:57:53,251 INFO L87 Difference]: Start difference. First operand 3617 states and 13188 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:54,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:57:54,531 INFO L93 Difference]: Finished difference Result 12373 states and 41772 transitions. [2021-05-03 16:57:54,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-03 16:57:54,531 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 16:57:54,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:57:54,565 INFO L225 Difference]: With dead ends: 12373 [2021-05-03 16:57:54,565 INFO L226 Difference]: Without dead ends: 12373 [2021-05-03 16:57:54,566 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 683.8ms TimeCoverageRelationStatistics Valid=680, Invalid=1870, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 16:57:54,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12373 states. [2021-05-03 16:57:54,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12373 to 3680. [2021-05-03 16:57:54,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3680 states, 3679 states have (on average 3.6610491981516717) internal successors, (13469), 3679 states have internal predecessors, (13469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:54,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3680 states to 3680 states and 13469 transitions. [2021-05-03 16:57:54,736 INFO L78 Accepts]: Start accepts. Automaton has 3680 states and 13469 transitions. Word has length 32 [2021-05-03 16:57:54,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:57:54,737 INFO L480 AbstractCegarLoop]: Abstraction has 3680 states and 13469 transitions. [2021-05-03 16:57:54,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:54,737 INFO L276 IsEmpty]: Start isEmpty. Operand 3680 states and 13469 transitions. [2021-05-03 16:57:54,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 16:57:54,744 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:57:54,744 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:57:54,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:57:54,961 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:57:54,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:57:54,962 INFO L82 PathProgramCache]: Analyzing trace with hash 839203592, now seen corresponding path program 23 times [2021-05-03 16:57:54,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:57:54,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258740649] [2021-05-03 16:57:54,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:57:54,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:57:55,086 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:57:55,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258740649] [2021-05-03 16:57:55,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553758338] [2021-05-03 16:57:55,087 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:57:55,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 16:57:55,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:57:55,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 16:57:55,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:57:55,275 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:55,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:57:55,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-05-03 16:57:55,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462649265] [2021-05-03 16:57:55,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:57:55,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:57:55,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:57:55,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:57:55,277 INFO L87 Difference]: Start difference. First operand 3680 states and 13469 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:56,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:57:56,698 INFO L93 Difference]: Finished difference Result 11569 states and 38849 transitions. [2021-05-03 16:57:56,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-03 16:57:56,699 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 16:57:56,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:57:56,735 INFO L225 Difference]: With dead ends: 11569 [2021-05-03 16:57:56,735 INFO L226 Difference]: Without dead ends: 11569 [2021-05-03 16:57:56,736 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 789.2ms TimeCoverageRelationStatistics Valid=691, Invalid=2171, Unknown=0, NotChecked=0, Total=2862 [2021-05-03 16:57:56,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11569 states. [2021-05-03 16:57:56,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11569 to 3687. [2021-05-03 16:57:56,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3687 states, 3686 states have (on average 3.6625067824199675) internal successors, (13500), 3686 states have internal predecessors, (13500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:56,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3687 states to 3687 states and 13500 transitions. [2021-05-03 16:57:56,891 INFO L78 Accepts]: Start accepts. Automaton has 3687 states and 13500 transitions. Word has length 32 [2021-05-03 16:57:56,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:57:56,891 INFO L480 AbstractCegarLoop]: Abstraction has 3687 states and 13500 transitions. [2021-05-03 16:57:56,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:57:56,891 INFO L276 IsEmpty]: Start isEmpty. Operand 3687 states and 13500 transitions. [2021-05-03 16:57:56,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 16:57:56,898 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:57:56,898 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:57:57,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-05-03 16:57:57,099 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:57:57,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:57:57,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1608999928, now seen corresponding path program 24 times [2021-05-03 16:57:57,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:57:57,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581527903] [2021-05-03 16:57:57,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:57:57,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:57:57,212 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:57:57,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581527903] [2021-05-03 16:57:57,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806552791] [2021-05-03 16:57:57,212 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:57:57,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 16:57:57,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:57:57,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 16:57:57,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:57:57,422 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:57:57,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:57:57,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-05-03 16:57:57,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940212515] [2021-05-03 16:57:57,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:57:57,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:57:57,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:57:57,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:57:57,423 INFO L87 Difference]: Start difference. First operand 3687 states and 13500 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:58:00,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:58:00,857 INFO L93 Difference]: Finished difference Result 11049 states and 35399 transitions. [2021-05-03 16:58:00,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-05-03 16:58:00,857 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 16:58:00,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:58:00,888 INFO L225 Difference]: With dead ends: 11049 [2021-05-03 16:58:00,888 INFO L226 Difference]: Without dead ends: 11049 [2021-05-03 16:58:00,889 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5558 ImplicationChecksByTransitivity, 2365.8ms TimeCoverageRelationStatistics Valid=2969, Invalid=11073, Unknown=0, NotChecked=0, Total=14042 [2021-05-03 16:58:00,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11049 states. [2021-05-03 16:58:01,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11049 to 3769. [2021-05-03 16:58:01,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3769 states, 3768 states have (on average 3.6520700636942673) internal successors, (13761), 3768 states have internal predecessors, (13761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:58:01,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3769 states to 3769 states and 13761 transitions. [2021-05-03 16:58:01,042 INFO L78 Accepts]: Start accepts. Automaton has 3769 states and 13761 transitions. Word has length 32 [2021-05-03 16:58:01,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:58:01,042 INFO L480 AbstractCegarLoop]: Abstraction has 3769 states and 13761 transitions. [2021-05-03 16:58:01,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:58:01,042 INFO L276 IsEmpty]: Start isEmpty. Operand 3769 states and 13761 transitions. [2021-05-03 16:58:01,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 16:58:01,072 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:58:01,072 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:58:01,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:58:01,273 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:58:01,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:58:01,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1001296282, now seen corresponding path program 25 times [2021-05-03 16:58:01,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:58:01,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987797595] [2021-05-03 16:58:01,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:58:01,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:58:01,372 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:58:01,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987797595] [2021-05-03 16:58:01,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003978991] [2021-05-03 16:58:01,373 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:58:01,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:58:01,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 16:58:01,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:58:01,556 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:58:01,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:58:01,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-05-03 16:58:01,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627653080] [2021-05-03 16:58:01,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:58:01,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:58:01,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:58:01,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:58:01,558 INFO L87 Difference]: Start difference. First operand 3769 states and 13761 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:58:04,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:58:04,129 INFO L93 Difference]: Finished difference Result 10568 states and 33987 transitions. [2021-05-03 16:58:04,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-05-03 16:58:04,130 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 16:58:04,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:58:04,156 INFO L225 Difference]: With dead ends: 10568 [2021-05-03 16:58:04,157 INFO L226 Difference]: Without dead ends: 10528 [2021-05-03 16:58:04,157 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3329 ImplicationChecksByTransitivity, 1659.3ms TimeCoverageRelationStatistics Valid=2003, Invalid=7117, Unknown=0, NotChecked=0, Total=9120 [2021-05-03 16:58:04,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10528 states. [2021-05-03 16:58:04,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10528 to 3799. [2021-05-03 16:58:04,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3799 states, 3798 states have (on average 3.644023170089521) internal successors, (13840), 3798 states have internal predecessors, (13840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:58:04,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3799 states to 3799 states and 13840 transitions. [2021-05-03 16:58:04,321 INFO L78 Accepts]: Start accepts. Automaton has 3799 states and 13840 transitions. Word has length 32 [2021-05-03 16:58:04,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:58:04,321 INFO L480 AbstractCegarLoop]: Abstraction has 3799 states and 13840 transitions. [2021-05-03 16:58:04,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:58:04,321 INFO L276 IsEmpty]: Start isEmpty. Operand 3799 states and 13840 transitions. [2021-05-03 16:58:04,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 16:58:04,327 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:58:04,327 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:58:04,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-05-03 16:58:04,528 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:58:04,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:58:04,528 INFO L82 PathProgramCache]: Analyzing trace with hash 364829428, now seen corresponding path program 26 times [2021-05-03 16:58:04,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:58:04,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292269831] [2021-05-03 16:58:04,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:58:04,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:58:04,632 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:58:04,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292269831] [2021-05-03 16:58:04,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394507335] [2021-05-03 16:58:04,633 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:58:04,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:58:04,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:58:04,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 16:58:04,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:58:04,805 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:58:04,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:58:04,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-05-03 16:58:04,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626351220] [2021-05-03 16:58:04,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 16:58:04,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:58:04,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 16:58:04,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-05-03 16:58:04,806 INFO L87 Difference]: Start difference. First operand 3799 states and 13840 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:58:06,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:58:06,892 INFO L93 Difference]: Finished difference Result 9751 states and 31922 transitions. [2021-05-03 16:58:06,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-05-03 16:58:06,893 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 16:58:06,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:58:06,918 INFO L225 Difference]: With dead ends: 9751 [2021-05-03 16:58:06,918 INFO L226 Difference]: Without dead ends: 9703 [2021-05-03 16:58:06,918 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2176 ImplicationChecksByTransitivity, 1227.8ms TimeCoverageRelationStatistics Valid=1364, Invalid=5116, Unknown=0, NotChecked=0, Total=6480 [2021-05-03 16:58:06,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9703 states. [2021-05-03 16:58:07,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9703 to 3801. [2021-05-03 16:58:07,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3801 states, 3800 states have (on average 3.6444736842105265) internal successors, (13849), 3800 states have internal predecessors, (13849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:58:07,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3801 states to 3801 states and 13849 transitions. [2021-05-03 16:58:07,052 INFO L78 Accepts]: Start accepts. Automaton has 3801 states and 13849 transitions. Word has length 32 [2021-05-03 16:58:07,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:58:07,052 INFO L480 AbstractCegarLoop]: Abstraction has 3801 states and 13849 transitions. [2021-05-03 16:58:07,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:58:07,052 INFO L276 IsEmpty]: Start isEmpty. Operand 3801 states and 13849 transitions. [2021-05-03 16:58:07,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 16:58:07,059 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:58:07,059 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:58:07,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-03 16:58:07,273 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:58:07,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:58:07,273 INFO L82 PathProgramCache]: Analyzing trace with hash 878521864, now seen corresponding path program 27 times [2021-05-03 16:58:07,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:58:07,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558679695] [2021-05-03 16:58:07,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:58:07,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:58:07,341 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:58:07,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558679695] [2021-05-03 16:58:07,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756112290] [2021-05-03 16:58:07,341 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:58:07,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 16:58:07,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:58:07,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 16:58:07,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:58:07,545 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:58:07,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:58:07,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-05-03 16:58:07,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492746548] [2021-05-03 16:58:07,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 16:58:07,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:58:07,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 16:58:07,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-05-03 16:58:07,546 INFO L87 Difference]: Start difference. First operand 3801 states and 13849 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:58:08,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:58:08,869 INFO L93 Difference]: Finished difference Result 14063 states and 48419 transitions. [2021-05-03 16:58:08,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 16:58:08,871 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 16:58:08,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:58:08,912 INFO L225 Difference]: With dead ends: 14063 [2021-05-03 16:58:08,912 INFO L226 Difference]: Without dead ends: 14063 [2021-05-03 16:58:08,913 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 583.2ms TimeCoverageRelationStatistics Valid=444, Invalid=1116, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 16:58:08,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14063 states. [2021-05-03 16:58:09,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14063 to 4679. [2021-05-03 16:58:09,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4679 states, 4678 states have (on average 3.8020521590423257) internal successors, (17786), 4678 states have internal predecessors, (17786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:58:09,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4679 states to 4679 states and 17786 transitions. [2021-05-03 16:58:09,162 INFO L78 Accepts]: Start accepts. Automaton has 4679 states and 17786 transitions. Word has length 32 [2021-05-03 16:58:09,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:58:09,162 INFO L480 AbstractCegarLoop]: Abstraction has 4679 states and 17786 transitions. [2021-05-03 16:58:09,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:58:09,162 INFO L276 IsEmpty]: Start isEmpty. Operand 4679 states and 17786 transitions. [2021-05-03 16:58:09,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 16:58:09,170 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:58:09,170 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:58:09,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:58:09,371 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:58:09,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:58:09,371 INFO L82 PathProgramCache]: Analyzing trace with hash 313112068, now seen corresponding path program 29 times [2021-05-03 16:58:09,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:58:09,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193526471] [2021-05-03 16:58:09,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:58:09,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:58:09,737 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-05-03 16:58:09,934 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-05-03 16:58:10,124 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:58:10,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193526471] [2021-05-03 16:58:10,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033212760] [2021-05-03 16:58:10,125 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:58:10,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:58:10,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:58:10,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 16:58:10,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:58:10,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 16:58:10,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:58:10,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:58:10,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:58:10,297 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-05-03 16:58:10,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:58:10,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-05-03 16:58:10,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:58:10,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:58:10,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:58:10,363 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:40 [2021-05-03 16:58:10,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:58:10,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:58:10,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:58:10,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 36 [2021-05-03 16:58:10,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:58:10,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:58:10,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:58:10,453 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:47 [2021-05-03 16:58:10,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:58:10,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:58:10,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:58:10,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 41 [2021-05-03 16:58:10,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:58:10,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:58:10,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:58:10,681 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:47 [2021-05-03 16:58:10,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:58:10,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:58:10,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:58:10,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:58:10,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:58:10,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 39 [2021-05-03 16:58:10,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:58:10,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:58:10,853 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 1 xjuncts. [2021-05-03 16:58:10,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:57, output treesize:45 [2021-05-03 16:58:10,971 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:58:10,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:58:10,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-05-03 16:58:10,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229862147] [2021-05-03 16:58:10,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 16:58:10,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:58:10,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 16:58:10,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:58:10,972 INFO L87 Difference]: Start difference. First operand 4679 states and 17786 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:58:11,169 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 22 [2021-05-03 16:58:11,562 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2021-05-03 16:58:12,256 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 39 [2021-05-03 16:58:12,516 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-05-03 16:58:12,722 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 45 [2021-05-03 16:58:13,476 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2021-05-03 16:58:13,638 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-05-03 16:58:13,971 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-05-03 16:58:14,304 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-05-03 16:58:14,614 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 39 [2021-05-03 16:58:17,329 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-05-03 16:58:17,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:58:17,475 INFO L93 Difference]: Finished difference Result 8092 states and 28492 transitions. [2021-05-03 16:58:17,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-03 16:58:17,475 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 16:58:17,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:58:17,493 INFO L225 Difference]: With dead ends: 8092 [2021-05-03 16:58:17,494 INFO L226 Difference]: Without dead ends: 7481 [2021-05-03 16:58:17,494 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1995 ImplicationChecksByTransitivity, 5721.1ms TimeCoverageRelationStatistics Valid=779, Invalid=5227, Unknown=0, NotChecked=0, Total=6006 [2021-05-03 16:58:17,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7481 states. [2021-05-03 16:58:17,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7481 to 5073. [2021-05-03 16:58:17,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5073 states, 5072 states have (on average 3.789826498422713) internal successors, (19222), 5072 states have internal predecessors, (19222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:58:17,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5073 states to 5073 states and 19222 transitions. [2021-05-03 16:58:17,625 INFO L78 Accepts]: Start accepts. Automaton has 5073 states and 19222 transitions. Word has length 32 [2021-05-03 16:58:17,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:58:17,625 INFO L480 AbstractCegarLoop]: Abstraction has 5073 states and 19222 transitions. [2021-05-03 16:58:17,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:58:17,626 INFO L276 IsEmpty]: Start isEmpty. Operand 5073 states and 19222 transitions. [2021-05-03 16:58:17,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 16:58:17,635 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:58:17,635 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:58:17,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-05-03 16:58:17,835 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:58:17,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:58:17,836 INFO L82 PathProgramCache]: Analyzing trace with hash -500654400, now seen corresponding path program 30 times [2021-05-03 16:58:17,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:58:17,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791442925] [2021-05-03 16:58:17,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:58:17,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:58:18,344 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-05-03 16:58:18,534 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:58:18,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791442925] [2021-05-03 16:58:18,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739876739] [2021-05-03 16:58:18,535 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:58:18,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 16:58:18,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:58:18,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 16:58:18,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:58:18,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 16:58:18,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:58:18,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:58:18,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:58:18,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:30 [2021-05-03 16:58:18,878 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-05-03 16:58:18,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 16:58:18,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:58:18,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:58:18,904 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 1 xjuncts. [2021-05-03 16:58:18,905 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:42 [2021-05-03 16:58:19,018 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-05-03 16:58:19,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-05-03 16:58:19,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:58:19,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:58:19,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-05-03 16:58:19,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:54 [2021-05-03 16:58:19,264 INFO L354 Elim1Store]: treesize reduction 72, result has 18.2 percent of original size [2021-05-03 16:58:19,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 38 [2021-05-03 16:58:19,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:58:19,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:58:19,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-05-03 16:58:19,309 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:70, output treesize:69 [2021-05-03 16:58:19,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:58:19,840 INFO L354 Elim1Store]: treesize reduction 104, result has 16.8 percent of original size [2021-05-03 16:58:19,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 37 treesize of output 48 [2021-05-03 16:58:19,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:58:19,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:58:19,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2021-05-03 16:58:19,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:76, output treesize:75 [2021-05-03 16:58:20,216 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:58:20,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:58:20,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-05-03 16:58:20,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359816357] [2021-05-03 16:58:20,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 16:58:20,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:58:20,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 16:58:20,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:58:20,217 INFO L87 Difference]: Start difference. First operand 5073 states and 19222 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:58:20,963 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 42 [2021-05-03 16:58:21,138 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 35 [2021-05-03 16:58:21,724 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 50 [2021-05-03 16:58:22,842 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 44 [2021-05-03 16:58:23,019 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-05-03 16:58:23,202 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 41 [2021-05-03 16:58:24,228 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2021-05-03 16:58:24,650 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-05-03 16:58:26,027 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 64 [2021-05-03 16:58:26,233 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 50 [2021-05-03 16:58:26,491 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 59 [2021-05-03 16:58:27,353 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-05-03 16:58:27,860 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-05-03 16:58:28,014 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-05-03 16:58:28,330 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-05-03 16:58:29,797 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-05-03 16:58:31,588 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-05-03 16:58:33,397 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2021-05-03 16:58:39,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:58:39,174 INFO L93 Difference]: Finished difference Result 9505 states and 33563 transitions. [2021-05-03 16:58:39,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-03 16:58:39,176 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 16:58:39,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:58:39,198 INFO L225 Difference]: With dead ends: 9505 [2021-05-03 16:58:39,199 INFO L226 Difference]: Without dead ends: 8978 [2021-05-03 16:58:39,199 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2735 ImplicationChecksByTransitivity, 11837.5ms TimeCoverageRelationStatistics Valid=1287, Invalid=6369, Unknown=0, NotChecked=0, Total=7656 [2021-05-03 16:58:39,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8978 states. [2021-05-03 16:58:39,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8978 to 6235. [2021-05-03 16:58:39,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6235 states, 6234 states have (on average 3.693294834777029) internal successors, (23024), 6234 states have internal predecessors, (23024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:58:39,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6235 states to 6235 states and 23024 transitions. [2021-05-03 16:58:39,405 INFO L78 Accepts]: Start accepts. Automaton has 6235 states and 23024 transitions. Word has length 32 [2021-05-03 16:58:39,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:58:39,405 INFO L480 AbstractCegarLoop]: Abstraction has 6235 states and 23024 transitions. [2021-05-03 16:58:39,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:58:39,406 INFO L276 IsEmpty]: Start isEmpty. Operand 6235 states and 23024 transitions. [2021-05-03 16:58:39,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 16:58:39,430 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:58:39,430 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:58:39,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:58:39,649 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:58:39,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:58:39,649 INFO L82 PathProgramCache]: Analyzing trace with hash 457173692, now seen corresponding path program 31 times [2021-05-03 16:58:39,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:58:39,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80128270] [2021-05-03 16:58:39,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:58:39,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:58:40,051 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-05-03 16:58:40,203 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-05-03 16:58:40,359 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-05-03 16:58:40,651 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:58:40,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80128270] [2021-05-03 16:58:40,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835613675] [2021-05-03 16:58:40,651 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:58:40,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:58:40,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 16:58:40,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:58:40,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 16:58:40,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:58:40,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:58:40,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:58:40,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:30 [2021-05-03 16:58:40,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:58:40,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 16:58:40,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:58:40,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:58:40,963 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 1 xjuncts. [2021-05-03 16:58:40,963 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:37 [2021-05-03 16:58:41,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:58:41,068 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-05-03 16:58:41,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-05-03 16:58:41,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:58:41,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:58:41,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-05-03 16:58:41,095 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:45, output treesize:44 [2021-05-03 16:58:41,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:58:41,189 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-05-03 16:58:41,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-05-03 16:58:41,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:58:41,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:58:41,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-05-03 16:58:41,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:49 [2021-05-03 16:58:41,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:58:41,533 INFO L354 Elim1Store]: treesize reduction 64, result has 20.0 percent of original size [2021-05-03 16:58:41,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 38 [2021-05-03 16:58:41,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:58:41,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:58:41,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-05-03 16:58:41,572 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:59, output treesize:58 [2021-05-03 16:58:41,890 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:58:41,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:58:41,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-05-03 16:58:41,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67524657] [2021-05-03 16:58:41,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:58:41,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:58:41,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:58:41,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:58:41,891 INFO L87 Difference]: Start difference. First operand 6235 states and 23024 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:58:42,543 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-05-03 16:58:42,799 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2021-05-03 16:58:43,003 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-05-03 16:58:43,349 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-05-03 16:58:43,773 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 70 [2021-05-03 16:58:43,938 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-05-03 16:58:44,241 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2021-05-03 16:58:44,743 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-05-03 16:58:45,027 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2021-05-03 16:58:45,305 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2021-05-03 16:58:45,592 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2021-05-03 16:58:45,793 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2021-05-03 16:58:46,257 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-05-03 16:58:46,662 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-05-03 16:58:46,948 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2021-05-03 16:58:47,101 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-05-03 16:58:47,326 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2021-05-03 16:58:47,611 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 54 [2021-05-03 16:58:48,148 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2021-05-03 16:58:48,700 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2021-05-03 16:58:49,171 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2021-05-03 16:58:49,492 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-05-03 16:58:50,154 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-05-03 16:58:50,503 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 75 [2021-05-03 16:58:50,933 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 75 [2021-05-03 16:58:51,471 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 77 [2021-05-03 16:58:52,157 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2021-05-03 16:58:52,680 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 78 [2021-05-03 16:58:53,231 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 80 [2021-05-03 16:58:53,666 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 79 [2021-05-03 16:58:54,020 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-05-03 16:58:54,348 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2021-05-03 16:58:55,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:58:55,518 INFO L93 Difference]: Finished difference Result 9461 states and 33539 transitions. [2021-05-03 16:58:55,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-03 16:58:55,520 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 16:58:55,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:58:55,547 INFO L225 Difference]: With dead ends: 9461 [2021-05-03 16:58:55,547 INFO L226 Difference]: Without dead ends: 9330 [2021-05-03 16:58:55,548 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1561 ImplicationChecksByTransitivity, 11141.2ms TimeCoverageRelationStatistics Valid=771, Invalid=4485, Unknown=0, NotChecked=0, Total=5256 [2021-05-03 16:58:55,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9330 states. [2021-05-03 16:58:55,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9330 to 7112. [2021-05-03 16:58:55,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7112 states, 7111 states have (on average 3.676135564618197) internal successors, (26141), 7111 states have internal predecessors, (26141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:58:55,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7112 states to 7112 states and 26141 transitions. [2021-05-03 16:58:55,746 INFO L78 Accepts]: Start accepts. Automaton has 7112 states and 26141 transitions. Word has length 32 [2021-05-03 16:58:55,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:58:55,746 INFO L480 AbstractCegarLoop]: Abstraction has 7112 states and 26141 transitions. [2021-05-03 16:58:55,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:58:55,747 INFO L276 IsEmpty]: Start isEmpty. Operand 7112 states and 26141 transitions. [2021-05-03 16:58:55,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 16:58:55,762 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:58:55,762 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:58:55,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-05-03 16:58:55,981 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:58:55,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:58:55,981 INFO L82 PathProgramCache]: Analyzing trace with hash 737661248, now seen corresponding path program 32 times [2021-05-03 16:58:55,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:58:55,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942733615] [2021-05-03 16:58:55,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:58:55,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:58:56,219 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-05-03 16:58:56,586 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-05-03 16:58:56,723 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-05-03 16:58:56,984 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:58:56,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942733615] [2021-05-03 16:58:56,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281541602] [2021-05-03 16:58:56,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:58:57,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:58:57,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:58:57,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 16:58:57,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:58:57,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 16:58:57,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:58:57,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:58:57,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:58:57,280 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:30 [2021-05-03 16:58:57,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:58:57,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-05-03 16:58:57,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:58:57,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:58:57,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:58:57,388 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:39 [2021-05-03 16:58:57,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:58:57,523 INFO L354 Elim1Store]: treesize reduction 38, result has 25.5 percent of original size [2021-05-03 16:58:57,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 32 [2021-05-03 16:58:57,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:58:57,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:58:57,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:58:57,558 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:51 [2021-05-03 16:58:57,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:58:57,745 INFO L354 Elim1Store]: treesize reduction 35, result has 12.5 percent of original size [2021-05-03 16:58:57,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 37 [2021-05-03 16:58:57,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:58:57,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:58:57,781 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 1 xjuncts. [2021-05-03 16:58:57,781 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:51 [2021-05-03 16:58:57,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:58:57,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:58:57,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:58:57,921 INFO L354 Elim1Store]: treesize reduction 35, result has 12.5 percent of original size [2021-05-03 16:58:57,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 42 [2021-05-03 16:58:57,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:58:57,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:58:57,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-05-03 16:58:57,959 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:59, output treesize:58 [2021-05-03 16:58:58,425 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:58:58,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:58:58,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-05-03 16:58:58,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401066492] [2021-05-03 16:58:58,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:58:58,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:58:58,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:58:58,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:58:58,426 INFO L87 Difference]: Start difference. First operand 7112 states and 26141 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:58:58,942 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-05-03 16:58:59,341 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-05-03 16:58:59,544 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 30 [2021-05-03 16:58:59,803 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-05-03 16:59:00,543 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-05-03 16:59:00,813 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 35 [2021-05-03 16:59:01,389 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-03 16:59:02,288 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 38 [2021-05-03 16:59:02,495 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 34 [2021-05-03 16:59:02,867 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-05-03 16:59:03,116 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-05-03 16:59:03,715 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-05-03 16:59:03,900 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 47 [2021-05-03 16:59:04,198 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-05-03 16:59:04,520 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2021-05-03 16:59:04,779 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2021-05-03 16:59:05,039 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-05-03 16:59:05,859 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-05-03 16:59:06,269 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2021-05-03 16:59:06,725 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 70 [2021-05-03 16:59:07,539 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 66 [2021-05-03 16:59:07,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:59:07,721 INFO L93 Difference]: Finished difference Result 11524 states and 39694 transitions. [2021-05-03 16:59:07,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-03 16:59:07,723 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 16:59:07,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:59:07,753 INFO L225 Difference]: With dead ends: 11524 [2021-05-03 16:59:07,753 INFO L226 Difference]: Without dead ends: 11161 [2021-05-03 16:59:07,753 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1458 ImplicationChecksByTransitivity, 7858.8ms TimeCoverageRelationStatistics Valid=836, Invalid=4134, Unknown=0, NotChecked=0, Total=4970 [2021-05-03 16:59:07,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11161 states. [2021-05-03 16:59:07,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11161 to 7436. [2021-05-03 16:59:07,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7436 states, 7435 states have (on average 3.662138533960995) internal successors, (27228), 7435 states have internal predecessors, (27228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:59:07,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7436 states to 7436 states and 27228 transitions. [2021-05-03 16:59:07,966 INFO L78 Accepts]: Start accepts. Automaton has 7436 states and 27228 transitions. Word has length 32 [2021-05-03 16:59:07,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:59:07,966 INFO L480 AbstractCegarLoop]: Abstraction has 7436 states and 27228 transitions. [2021-05-03 16:59:07,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:59:07,966 INFO L276 IsEmpty]: Start isEmpty. Operand 7436 states and 27228 transitions. [2021-05-03 16:59:07,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 16:59:07,985 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:59:07,985 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:59:08,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:59:08,203 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:59:08,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:59:08,203 INFO L82 PathProgramCache]: Analyzing trace with hash 372642824, now seen corresponding path program 33 times [2021-05-03 16:59:08,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:59:08,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622999228] [2021-05-03 16:59:08,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:59:08,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:59:08,474 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-05-03 16:59:08,618 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-05-03 16:59:08,813 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-05-03 16:59:09,036 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-05-03 16:59:09,227 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-05-03 16:59:09,771 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:59:09,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622999228] [2021-05-03 16:59:09,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506175498] [2021-05-03 16:59:09,771 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:59:09,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 16:59:09,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:59:09,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 16:59:09,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:59:09,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 16:59:09,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:59:10,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:59:10,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:59:10,003 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-05-03 16:59:10,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:59:10,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-05-03 16:59:10,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:59:10,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:59:10,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:59:10,069 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-05-03 16:59:10,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:59:10,224 INFO L354 Elim1Store]: treesize reduction 38, result has 25.5 percent of original size [2021-05-03 16:59:10,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 32 [2021-05-03 16:59:10,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:59:10,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:59:10,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:59:10,275 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:51 [2021-05-03 16:59:10,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:59:10,573 INFO L354 Elim1Store]: treesize reduction 72, result has 20.0 percent of original size [2021-05-03 16:59:10,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 42 [2021-05-03 16:59:10,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:59:10,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:59:10,618 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 1 xjuncts. [2021-05-03 16:59:10,619 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:64, output treesize:63 [2021-05-03 16:59:10,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:59:10,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:59:10,901 INFO L354 Elim1Store]: treesize reduction 41, result has 10.9 percent of original size [2021-05-03 16:59:10,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 43 [2021-05-03 16:59:10,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:59:10,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:59:10,949 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 1 xjuncts. [2021-05-03 16:59:10,949 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:70, output treesize:62 [2021-05-03 16:59:11,525 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:59:11,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:59:11,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 30 [2021-05-03 16:59:11,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341773286] [2021-05-03 16:59:11,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 16:59:11,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:59:11,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 16:59:11,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2021-05-03 16:59:11,526 INFO L87 Difference]: Start difference. First operand 7436 states and 27228 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:59:12,047 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 24 [2021-05-03 16:59:12,721 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2021-05-03 16:59:13,114 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 35 [2021-05-03 16:59:13,422 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 34 [2021-05-03 16:59:13,617 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 42 [2021-05-03 16:59:13,885 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 37 [2021-05-03 16:59:14,630 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 74 [2021-05-03 16:59:14,909 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2021-05-03 16:59:15,669 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2021-05-03 16:59:16,003 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2021-05-03 16:59:16,383 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-05-03 16:59:16,890 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-05-03 16:59:17,218 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2021-05-03 16:59:17,699 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 55 [2021-05-03 16:59:17,888 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-05-03 16:59:18,099 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-05-03 16:59:18,897 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2021-05-03 16:59:19,577 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 49 [2021-05-03 16:59:19,912 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2021-05-03 16:59:20,263 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-05-03 16:59:20,611 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-05-03 16:59:20,896 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-05-03 16:59:21,456 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 68 [2021-05-03 16:59:21,699 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-05-03 16:59:22,116 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-05-03 16:59:22,499 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-05-03 16:59:22,894 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-05-03 16:59:23,459 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-05-03 16:59:24,859 WARN L205 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 85 [2021-05-03 16:59:25,870 WARN L205 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 82 [2021-05-03 16:59:26,298 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 69 [2021-05-03 16:59:26,739 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2021-05-03 16:59:27,503 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-05-03 16:59:27,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:59:27,818 INFO L93 Difference]: Finished difference Result 12806 states and 42708 transitions. [2021-05-03 16:59:27,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-03 16:59:27,821 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 16:59:27,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:59:27,856 INFO L225 Difference]: With dead ends: 12806 [2021-05-03 16:59:27,856 INFO L226 Difference]: Without dead ends: 12603 [2021-05-03 16:59:27,857 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2545 ImplicationChecksByTransitivity, 14353.0ms TimeCoverageRelationStatistics Valid=1266, Invalid=6744, Unknown=0, NotChecked=0, Total=8010 [2021-05-03 16:59:27,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12603 states. [2021-05-03 16:59:28,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12603 to 7670. [2021-05-03 16:59:28,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7670 states, 7669 states have (on average 3.6660581562133263) internal successors, (28115), 7669 states have internal predecessors, (28115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:59:28,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7670 states to 7670 states and 28115 transitions. [2021-05-03 16:59:28,095 INFO L78 Accepts]: Start accepts. Automaton has 7670 states and 28115 transitions. Word has length 32 [2021-05-03 16:59:28,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:59:28,095 INFO L480 AbstractCegarLoop]: Abstraction has 7670 states and 28115 transitions. [2021-05-03 16:59:28,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:59:28,095 INFO L276 IsEmpty]: Start isEmpty. Operand 7670 states and 28115 transitions. [2021-05-03 16:59:28,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 16:59:28,109 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:59:28,109 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:59:28,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-05-03 16:59:28,311 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:59:28,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:59:28,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1841137736, now seen corresponding path program 34 times [2021-05-03 16:59:28,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:59:28,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478423268] [2021-05-03 16:59:28,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:59:28,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:59:28,586 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-05-03 16:59:28,780 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-05-03 16:59:28,946 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-05-03 16:59:29,203 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-05-03 16:59:29,394 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-05-03 16:59:29,744 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:59:29,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478423268] [2021-05-03 16:59:29,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117162148] [2021-05-03 16:59:29,744 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:59:29,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:59:29,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:59:29,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-03 16:59:29,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:59:30,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 16:59:30,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:59:30,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:59:30,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:59:30,121 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:24 [2021-05-03 16:59:30,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:59:30,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-05-03 16:59:30,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:59:30,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:59:30,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:59:30,255 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:33 [2021-05-03 16:59:30,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:59:30,380 INFO L354 Elim1Store]: treesize reduction 38, result has 25.5 percent of original size [2021-05-03 16:59:30,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 32 [2021-05-03 16:59:30,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:59:30,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:59:30,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:59:30,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:40 [2021-05-03 16:59:30,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:59:30,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-05-03 16:59:30,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:59:30,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:59:30,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:59:30,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:33 [2021-05-03 16:59:30,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:59:30,676 INFO L354 Elim1Store]: treesize reduction 38, result has 25.5 percent of original size [2021-05-03 16:59:30,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 32 [2021-05-03 16:59:30,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:59:30,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:59:30,708 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 1 xjuncts. [2021-05-03 16:59:30,708 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:45 [2021-05-03 16:59:31,020 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:59:31,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:59:31,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2021-05-03 16:59:31,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983210811] [2021-05-03 16:59:31,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 16:59:31,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:59:31,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 16:59:31,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-05-03 16:59:31,021 INFO L87 Difference]: Start difference. First operand 7670 states and 28115 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:59:31,720 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-05-03 16:59:32,429 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 67 [2021-05-03 16:59:32,756 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 30 [2021-05-03 16:59:32,983 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 30 [2021-05-03 16:59:33,420 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 41 [2021-05-03 16:59:33,633 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 26 [2021-05-03 16:59:34,032 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-05-03 16:59:34,244 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-05-03 16:59:34,596 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 70 [2021-05-03 16:59:35,055 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2021-05-03 16:59:35,842 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 58 [2021-05-03 16:59:36,212 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-05-03 16:59:36,664 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-05-03 16:59:37,058 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 35 [2021-05-03 16:59:37,374 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2021-05-03 16:59:37,952 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2021-05-03 16:59:38,337 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-05-03 16:59:38,733 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 60 [2021-05-03 16:59:38,936 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-05-03 16:59:39,348 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 66 [2021-05-03 16:59:40,796 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 72 [2021-05-03 16:59:41,190 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2021-05-03 16:59:41,355 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-05-03 16:59:41,770 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-05-03 16:59:42,594 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-05-03 16:59:43,497 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-05-03 16:59:43,683 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-05-03 16:59:44,025 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2021-05-03 16:59:44,393 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 55 [2021-05-03 16:59:44,617 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2021-05-03 16:59:45,489 WARN L205 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 79 [2021-05-03 16:59:45,996 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2021-05-03 16:59:46,402 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2021-05-03 16:59:47,211 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 75 [2021-05-03 16:59:47,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:59:47,421 INFO L93 Difference]: Finished difference Result 15041 states and 50266 transitions. [2021-05-03 16:59:47,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-03 16:59:47,424 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 16:59:47,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:59:47,465 INFO L225 Difference]: With dead ends: 15041 [2021-05-03 16:59:47,465 INFO L226 Difference]: Without dead ends: 14093 [2021-05-03 16:59:47,466 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2202 ImplicationChecksByTransitivity, 15106.3ms TimeCoverageRelationStatistics Valid=1184, Invalid=5622, Unknown=0, NotChecked=0, Total=6806 [2021-05-03 16:59:47,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14093 states. [2021-05-03 16:59:47,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14093 to 7981. [2021-05-03 16:59:47,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7981 states, 7980 states have (on average 3.6159147869674184) internal successors, (28855), 7980 states have internal predecessors, (28855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:59:47,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7981 states to 7981 states and 28855 transitions. [2021-05-03 16:59:47,703 INFO L78 Accepts]: Start accepts. Automaton has 7981 states and 28855 transitions. Word has length 32 [2021-05-03 16:59:47,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:59:47,703 INFO L480 AbstractCegarLoop]: Abstraction has 7981 states and 28855 transitions. [2021-05-03 16:59:47,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:59:47,703 INFO L276 IsEmpty]: Start isEmpty. Operand 7981 states and 28855 transitions. [2021-05-03 16:59:47,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 16:59:47,719 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:59:47,719 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:59:47,933 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:59:47,934 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:59:47,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:59:47,934 INFO L82 PathProgramCache]: Analyzing trace with hash -564856572, now seen corresponding path program 35 times [2021-05-03 16:59:47,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:59:47,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564972948] [2021-05-03 16:59:47,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:59:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:59:48,694 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2021-05-03 16:59:48,970 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2021-05-03 16:59:49,075 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:59:49,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564972948] [2021-05-03 16:59:49,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716654616] [2021-05-03 16:59:49,076 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:59:49,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:59:49,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:59:49,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 16:59:49,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:59:49,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 16:59:49,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:59:49,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:59:49,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:59:49,374 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-05-03 16:59:49,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 16:59:49,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:59:49,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:59:49,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:59:49,461 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:24 [2021-05-03 16:59:49,581 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-05-03 16:59:49,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-05-03 16:59:49,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:59:49,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:59:49,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:59:49,615 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:36 [2021-05-03 16:59:49,951 INFO L354 Elim1Store]: treesize reduction 64, result has 20.0 percent of original size [2021-05-03 16:59:49,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 38 [2021-05-03 16:59:49,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:59:49,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:59:49,991 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 1 xjuncts. [2021-05-03 16:59:49,991 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:51 [2021-05-03 16:59:50,570 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:59:50,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:59:50,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2021-05-03 16:59:50,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19145440] [2021-05-03 16:59:50,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 16:59:50,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:59:50,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 16:59:50,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-05-03 16:59:50,571 INFO L87 Difference]: Start difference. First operand 7981 states and 28855 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:59:51,097 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 25 [2021-05-03 16:59:56,212 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-05-03 16:59:56,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:59:56,715 INFO L93 Difference]: Finished difference Result 14712 states and 50770 transitions. [2021-05-03 16:59:56,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 16:59:56,717 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 16:59:56,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:59:56,759 INFO L225 Difference]: With dead ends: 14712 [2021-05-03 16:59:56,760 INFO L226 Difference]: Without dead ends: 14295 [2021-05-03 16:59:56,760 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 3717.7ms TimeCoverageRelationStatistics Valid=422, Invalid=2334, Unknown=0, NotChecked=0, Total=2756 [2021-05-03 16:59:56,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14295 states. [2021-05-03 16:59:56,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14295 to 7431. [2021-05-03 16:59:56,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7431 states, 7430 states have (on average 3.677658142664872) internal successors, (27325), 7430 states have internal predecessors, (27325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:59:57,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7431 states to 7431 states and 27325 transitions. [2021-05-03 16:59:57,000 INFO L78 Accepts]: Start accepts. Automaton has 7431 states and 27325 transitions. Word has length 32 [2021-05-03 16:59:57,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:59:57,000 INFO L480 AbstractCegarLoop]: Abstraction has 7431 states and 27325 transitions. [2021-05-03 16:59:57,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:59:57,001 INFO L276 IsEmpty]: Start isEmpty. Operand 7431 states and 27325 transitions. [2021-05-03 16:59:57,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:59:57,016 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:59:57,016 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:59:57,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-05-03 16:59:57,217 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:59:57,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:59:57,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1539718298, now seen corresponding path program 28 times [2021-05-03 16:59:57,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:59:57,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314842037] [2021-05-03 16:59:57,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:59:57,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:59:57,376 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:59:57,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314842037] [2021-05-03 16:59:57,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992112083] [2021-05-03 16:59:57,376 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:59:57,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:59:57,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:59:57,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 16:59:57,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:59:57,838 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:59:57,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:59:57,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 16:59:57,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182019605] [2021-05-03 16:59:57,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 16:59:57,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:59:57,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 16:59:57,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-05-03 16:59:57,839 INFO L87 Difference]: Start difference. First operand 7431 states and 27325 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:59:59,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:59:59,464 INFO L93 Difference]: Finished difference Result 12227 states and 42154 transitions. [2021-05-03 16:59:59,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 16:59:59,466 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 16:59:59,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:59:59,497 INFO L225 Difference]: With dead ends: 12227 [2021-05-03 16:59:59,498 INFO L226 Difference]: Without dead ends: 12227 [2021-05-03 16:59:59,498 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1110.1ms TimeCoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 16:59:59,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12227 states. [2021-05-03 16:59:59,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12227 to 8555. [2021-05-03 16:59:59,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8555 states, 8554 states have (on average 3.6043956043956045) internal successors, (30832), 8554 states have internal predecessors, (30832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:59:59,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8555 states to 8555 states and 30832 transitions. [2021-05-03 16:59:59,732 INFO L78 Accepts]: Start accepts. Automaton has 8555 states and 30832 transitions. Word has length 34 [2021-05-03 16:59:59,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:59:59,732 INFO L480 AbstractCegarLoop]: Abstraction has 8555 states and 30832 transitions. [2021-05-03 16:59:59,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:59:59,732 INFO L276 IsEmpty]: Start isEmpty. Operand 8555 states and 30832 transitions. [2021-05-03 16:59:59,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:59:59,748 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:59:59,749 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:59:59,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:59:59,949 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:59:59,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:59:59,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1699871604, now seen corresponding path program 29 times [2021-05-03 16:59:59,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:59:59,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623180234] [2021-05-03 16:59:59,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:59:59,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:00:00,104 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:00:00,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623180234] [2021-05-03 17:00:00,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418036298] [2021-05-03 17:00:00,105 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:00:00,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 17:00:00,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:00:00,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:00:00,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:00:00,559 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 17:00:00,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:00:00,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-05-03 17:00:00,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821300206] [2021-05-03 17:00:00,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 17:00:00,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:00:00,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 17:00:00,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-05-03 17:00:00,560 INFO L87 Difference]: Start difference. First operand 8555 states and 30832 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:00:03,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:00:03,946 INFO L93 Difference]: Finished difference Result 13292 states and 44861 transitions. [2021-05-03 17:00:03,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-03 17:00:03,948 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 17:00:03,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:00:03,990 INFO L225 Difference]: With dead ends: 13292 [2021-05-03 17:00:03,990 INFO L226 Difference]: Without dead ends: 13292 [2021-05-03 17:00:03,991 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1883 ImplicationChecksByTransitivity, 2528.1ms TimeCoverageRelationStatistics Valid=1019, Invalid=4383, Unknown=0, NotChecked=0, Total=5402 [2021-05-03 17:00:04,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13292 states. [2021-05-03 17:00:04,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13292 to 8677. [2021-05-03 17:00:04,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8677 states, 8676 states have (on average 3.596934071000461) internal successors, (31207), 8676 states have internal predecessors, (31207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:00:04,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8677 states to 8677 states and 31207 transitions. [2021-05-03 17:00:04,214 INFO L78 Accepts]: Start accepts. Automaton has 8677 states and 31207 transitions. Word has length 34 [2021-05-03 17:00:04,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:00:04,214 INFO L480 AbstractCegarLoop]: Abstraction has 8677 states and 31207 transitions. [2021-05-03 17:00:04,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:00:04,214 INFO L276 IsEmpty]: Start isEmpty. Operand 8677 states and 31207 transitions. [2021-05-03 17:00:04,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 17:00:04,229 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:00:04,229 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:00:04,445 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-05-03 17:00:04,445 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:00:04,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:00:04,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1909728636, now seen corresponding path program 30 times [2021-05-03 17:00:04,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:00:04,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225513572] [2021-05-03 17:00:04,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:00:04,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:00:04,532 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:00:04,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225513572] [2021-05-03 17:00:04,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093717945] [2021-05-03 17:00:04,533 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 17:00:04,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 17:00:04,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:00:04,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:00:04,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:00:04,749 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:00:04,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:00:04,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-05-03 17:00:04,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329608796] [2021-05-03 17:00:04,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 17:00:04,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:00:04,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 17:00:04,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-05-03 17:00:04,750 INFO L87 Difference]: Start difference. First operand 8677 states and 31207 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:00:06,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:00:06,128 INFO L93 Difference]: Finished difference Result 12421 states and 42959 transitions. [2021-05-03 17:00:06,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 17:00:06,129 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 17:00:06,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:00:06,154 INFO L225 Difference]: With dead ends: 12421 [2021-05-03 17:00:06,155 INFO L226 Difference]: Without dead ends: 12409 [2021-05-03 17:00:06,155 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 892.9ms TimeCoverageRelationStatistics Valid=520, Invalid=2030, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 17:00:06,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12409 states. [2021-05-03 17:00:06,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12409 to 8715. [2021-05-03 17:00:06,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8715 states, 8714 states have (on average 3.594675235253615) internal successors, (31324), 8714 states have internal predecessors, (31324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:00:06,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8715 states to 8715 states and 31324 transitions. [2021-05-03 17:00:06,356 INFO L78 Accepts]: Start accepts. Automaton has 8715 states and 31324 transitions. Word has length 34 [2021-05-03 17:00:06,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:00:06,356 INFO L480 AbstractCegarLoop]: Abstraction has 8715 states and 31324 transitions. [2021-05-03 17:00:06,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:00:06,357 INFO L276 IsEmpty]: Start isEmpty. Operand 8715 states and 31324 transitions. [2021-05-03 17:00:06,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 17:00:06,370 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:00:06,370 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:00:06,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-05-03 17:00:06,573 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:00:06,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:00:06,573 INFO L82 PathProgramCache]: Analyzing trace with hash 150437974, now seen corresponding path program 31 times [2021-05-03 17:00:06,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:00:06,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818737529] [2021-05-03 17:00:06,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:00:06,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:00:06,666 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:00:06,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818737529] [2021-05-03 17:00:06,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149999306] [2021-05-03 17:00:06,667 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:00:06,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:00:06,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:00:06,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:00:06,898 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-03 17:00:06,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:00:06,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-05-03 17:00:06,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678038379] [2021-05-03 17:00:06,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:00:06,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:00:06,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:00:06,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:00:06,899 INFO L87 Difference]: Start difference. First operand 8715 states and 31324 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:00:07,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:00:07,710 INFO L93 Difference]: Finished difference Result 12190 states and 42541 transitions. [2021-05-03 17:00:07,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 17:00:07,711 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 17:00:07,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:00:07,736 INFO L225 Difference]: With dead ends: 12190 [2021-05-03 17:00:07,737 INFO L226 Difference]: Without dead ends: 12154 [2021-05-03 17:00:07,737 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 568.7ms TimeCoverageRelationStatistics Valid=354, Invalid=1368, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 17:00:07,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12154 states. [2021-05-03 17:00:07,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12154 to 8771. [2021-05-03 17:00:07,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8771 states, 8770 states have (on average 3.5904218928164195) internal successors, (31488), 8770 states have internal predecessors, (31488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:00:07,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8771 states to 8771 states and 31488 transitions. [2021-05-03 17:00:07,963 INFO L78 Accepts]: Start accepts. Automaton has 8771 states and 31488 transitions. Word has length 34 [2021-05-03 17:00:07,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:00:07,963 INFO L480 AbstractCegarLoop]: Abstraction has 8771 states and 31488 transitions. [2021-05-03 17:00:07,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:00:07,964 INFO L276 IsEmpty]: Start isEmpty. Operand 8771 states and 31488 transitions. [2021-05-03 17:00:07,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 17:00:07,980 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:00:07,980 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:00:08,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-05-03 17:00:08,196 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:00:08,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:00:08,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1876456102, now seen corresponding path program 32 times [2021-05-03 17:00:08,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:00:08,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203831377] [2021-05-03 17:00:08,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:00:08,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:00:08,360 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:00:08,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203831377] [2021-05-03 17:00:08,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220698168] [2021-05-03 17:00:08,360 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:00:08,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:00:08,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:00:08,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:00:08,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:00:08,545 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-03 17:00:08,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:00:08,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-05-03 17:00:08,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552844110] [2021-05-03 17:00:08,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 17:00:08,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:00:08,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 17:00:08,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:00:08,546 INFO L87 Difference]: Start difference. First operand 8771 states and 31488 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:00:09,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:00:09,223 INFO L93 Difference]: Finished difference Result 11808 states and 41522 transitions. [2021-05-03 17:00:09,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 17:00:09,225 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 17:00:09,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:00:09,249 INFO L225 Difference]: With dead ends: 11808 [2021-05-03 17:00:09,249 INFO L226 Difference]: Without dead ends: 11748 [2021-05-03 17:00:09,249 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 420.5ms TimeCoverageRelationStatistics Valid=195, Invalid=675, Unknown=0, NotChecked=0, Total=870 [2021-05-03 17:00:09,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11748 states. [2021-05-03 17:00:09,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11748 to 8789. [2021-05-03 17:00:09,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8789 states, 8788 states have (on average 3.5890987710514337) internal successors, (31541), 8788 states have internal predecessors, (31541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:00:09,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8789 states to 8789 states and 31541 transitions. [2021-05-03 17:00:09,441 INFO L78 Accepts]: Start accepts. Automaton has 8789 states and 31541 transitions. Word has length 34 [2021-05-03 17:00:09,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:00:09,441 INFO L480 AbstractCegarLoop]: Abstraction has 8789 states and 31541 transitions. [2021-05-03 17:00:09,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:00:09,441 INFO L276 IsEmpty]: Start isEmpty. Operand 8789 states and 31541 transitions. [2021-05-03 17:00:09,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 17:00:09,456 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:00:09,457 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:00:09,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:00:09,672 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:00:09,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:00:09,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1845655966, now seen corresponding path program 33 times [2021-05-03 17:00:09,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:00:09,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041043272] [2021-05-03 17:00:09,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:00:09,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:00:09,821 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:00:09,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041043272] [2021-05-03 17:00:09,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271490392] [2021-05-03 17:00:09,821 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:00:09,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 17:00:09,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:00:09,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 17:00:09,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:00:10,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 17:00:10,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:00:10,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:00:10,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:00:10,160 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-05-03 17:00:10,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:00:10,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-05-03 17:00:10,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:00:10,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:00:10,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 17:00:10,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:41 [2021-05-03 17:00:10,548 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 17:00:10,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:00:10,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-05-03 17:00:10,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028772615] [2021-05-03 17:00:10,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 17:00:10,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:00:10,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 17:00:10,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-05-03 17:00:10,549 INFO L87 Difference]: Start difference. First operand 8789 states and 31541 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:00:13,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:00:13,931 INFO L93 Difference]: Finished difference Result 16172 states and 53958 transitions. [2021-05-03 17:00:13,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-03 17:00:13,933 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 17:00:13,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:00:13,966 INFO L225 Difference]: With dead ends: 16172 [2021-05-03 17:00:13,967 INFO L226 Difference]: Without dead ends: 16172 [2021-05-03 17:00:13,967 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2063 ImplicationChecksByTransitivity, 2413.1ms TimeCoverageRelationStatistics Valid=1249, Invalid=5231, Unknown=0, NotChecked=0, Total=6480 [2021-05-03 17:00:13,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16172 states. [2021-05-03 17:00:14,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16172 to 8975. [2021-05-03 17:00:14,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8975 states, 8974 states have (on average 3.59605527078226) internal successors, (32271), 8974 states have internal predecessors, (32271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:00:14,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8975 states to 8975 states and 32271 transitions. [2021-05-03 17:00:14,284 INFO L78 Accepts]: Start accepts. Automaton has 8975 states and 32271 transitions. Word has length 34 [2021-05-03 17:00:14,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:00:14,285 INFO L480 AbstractCegarLoop]: Abstraction has 8975 states and 32271 transitions. [2021-05-03 17:00:14,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:00:14,285 INFO L276 IsEmpty]: Start isEmpty. Operand 8975 states and 32271 transitions. [2021-05-03 17:00:14,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 17:00:14,299 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:00:14,299 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:00:14,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-05-03 17:00:14,500 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:00:14,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:00:14,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1393933936, now seen corresponding path program 34 times [2021-05-03 17:00:14,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:00:14,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296591270] [2021-05-03 17:00:14,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:00:14,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:00:14,596 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:00:14,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296591270] [2021-05-03 17:00:14,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353068417] [2021-05-03 17:00:14,597 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:00:14,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:00:14,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:00:14,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 17:00:14,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:00:14,901 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:00:14,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:00:14,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-05-03 17:00:14,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119744458] [2021-05-03 17:00:14,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 17:00:14,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:00:14,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 17:00:14,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-05-03 17:00:14,902 INFO L87 Difference]: Start difference. First operand 8975 states and 32271 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:00:16,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:00:16,859 INFO L93 Difference]: Finished difference Result 24036 states and 79889 transitions. [2021-05-03 17:00:16,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-03 17:00:16,860 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 17:00:16,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:00:16,910 INFO L225 Difference]: With dead ends: 24036 [2021-05-03 17:00:16,910 INFO L226 Difference]: Without dead ends: 24032 [2021-05-03 17:00:16,911 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1099.5ms TimeCoverageRelationStatistics Valid=841, Invalid=2699, Unknown=0, NotChecked=0, Total=3540 [2021-05-03 17:00:16,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24032 states. [2021-05-03 17:00:17,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24032 to 11047. [2021-05-03 17:00:17,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11047 states, 11046 states have (on average 3.7311243889190657) internal successors, (41214), 11046 states have internal predecessors, (41214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:00:17,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11047 states to 11047 states and 41214 transitions. [2021-05-03 17:00:17,374 INFO L78 Accepts]: Start accepts. Automaton has 11047 states and 41214 transitions. Word has length 34 [2021-05-03 17:00:17,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:00:17,374 INFO L480 AbstractCegarLoop]: Abstraction has 11047 states and 41214 transitions. [2021-05-03 17:00:17,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:00:17,375 INFO L276 IsEmpty]: Start isEmpty. Operand 11047 states and 41214 transitions. [2021-05-03 17:00:17,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 17:00:17,392 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:00:17,392 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:00:17,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:00:17,593 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:00:17,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:00:17,593 INFO L82 PathProgramCache]: Analyzing trace with hash 764640244, now seen corresponding path program 35 times [2021-05-03 17:00:17,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:00:17,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167956230] [2021-05-03 17:00:17,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:00:17,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:00:17,721 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:00:17,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167956230] [2021-05-03 17:00:17,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425779095] [2021-05-03 17:00:17,722 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:00:17,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 17:00:17,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:00:17,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 17:00:17,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:00:17,978 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:00:17,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:00:17,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-05-03 17:00:17,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063238191] [2021-05-03 17:00:17,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 17:00:17,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:00:17,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 17:00:17,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-05-03 17:00:17,979 INFO L87 Difference]: Start difference. First operand 11047 states and 41214 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:00:19,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:00:19,505 INFO L93 Difference]: Finished difference Result 22537 states and 75410 transitions. [2021-05-03 17:00:19,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 17:00:19,506 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 17:00:19,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:00:19,558 INFO L225 Difference]: With dead ends: 22537 [2021-05-03 17:00:19,558 INFO L226 Difference]: Without dead ends: 22509 [2021-05-03 17:00:19,559 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 806.2ms TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 17:00:19,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22509 states. [2021-05-03 17:00:19,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22509 to 11049. [2021-05-03 17:00:19,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11049 states, 11048 states have (on average 3.730720492396814) internal successors, (41217), 11048 states have internal predecessors, (41217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:00:20,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11049 states to 11049 states and 41217 transitions. [2021-05-03 17:00:20,029 INFO L78 Accepts]: Start accepts. Automaton has 11049 states and 41217 transitions. Word has length 34 [2021-05-03 17:00:20,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:00:20,029 INFO L480 AbstractCegarLoop]: Abstraction has 11049 states and 41217 transitions. [2021-05-03 17:00:20,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:00:20,029 INFO L276 IsEmpty]: Start isEmpty. Operand 11049 states and 41217 transitions. [2021-05-03 17:00:20,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 17:00:20,045 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:00:20,045 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:00:20,259 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-05-03 17:00:20,259 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:00:20,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:00:20,259 INFO L82 PathProgramCache]: Analyzing trace with hash 338290534, now seen corresponding path program 36 times [2021-05-03 17:00:20,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:00:20,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494023144] [2021-05-03 17:00:20,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:00:20,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:00:20,338 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:00:20,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494023144] [2021-05-03 17:00:20,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230360063] [2021-05-03 17:00:20,339 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:00:20,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 17:00:20,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:00:20,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 17:00:20,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:00:20,594 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 17:00:20,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:00:20,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-05-03 17:00:20,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311631249] [2021-05-03 17:00:20,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 17:00:20,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:00:20,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 17:00:20,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-05-03 17:00:20,595 INFO L87 Difference]: Start difference. First operand 11049 states and 41217 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:00:24,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:00:24,003 INFO L93 Difference]: Finished difference Result 29555 states and 100040 transitions. [2021-05-03 17:00:24,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-05-03 17:00:24,005 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 17:00:24,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:00:24,083 INFO L225 Difference]: With dead ends: 29555 [2021-05-03 17:00:24,083 INFO L226 Difference]: Without dead ends: 29555 [2021-05-03 17:00:24,084 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3161 ImplicationChecksByTransitivity, 2034.1ms TimeCoverageRelationStatistics Valid=1869, Invalid=6503, Unknown=0, NotChecked=0, Total=8372 [2021-05-03 17:00:24,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29555 states. [2021-05-03 17:00:24,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29555 to 12824. [2021-05-03 17:00:24,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12824 states, 12823 states have (on average 3.804257973953053) internal successors, (48782), 12823 states have internal predecessors, (48782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:00:24,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12824 states to 12824 states and 48782 transitions. [2021-05-03 17:00:24,605 INFO L78 Accepts]: Start accepts. Automaton has 12824 states and 48782 transitions. Word has length 34 [2021-05-03 17:00:24,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:00:24,605 INFO L480 AbstractCegarLoop]: Abstraction has 12824 states and 48782 transitions. [2021-05-03 17:00:24,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:00:24,605 INFO L276 IsEmpty]: Start isEmpty. Operand 12824 states and 48782 transitions. [2021-05-03 17:00:24,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:00:24,628 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:00:24,628 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:00:24,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:00:24,837 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:00:24,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:00:24,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1781126392, now seen corresponding path program 36 times [2021-05-03 17:00:24,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:00:24,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714113226] [2021-05-03 17:00:24,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:00:24,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:00:24,953 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:00:24,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714113226] [2021-05-03 17:00:24,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260951283] [2021-05-03 17:00:24,953 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:00:24,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 17:00:24,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:00:24,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 17:00:24,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:00:25,347 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 17:00:25,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:00:25,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-05-03 17:00:25,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796224863] [2021-05-03 17:00:25,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 17:00:25,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:00:25,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 17:00:25,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-05-03 17:00:25,348 INFO L87 Difference]: Start difference. First operand 12824 states and 48782 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:00:31,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:00:31,026 INFO L93 Difference]: Finished difference Result 33922 states and 120694 transitions. [2021-05-03 17:00:31,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-05-03 17:00:31,030 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:00:31,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:00:31,115 INFO L225 Difference]: With dead ends: 33922 [2021-05-03 17:00:31,116 INFO L226 Difference]: Without dead ends: 33922 [2021-05-03 17:00:31,118 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7207 ImplicationChecksByTransitivity, 3522.4ms TimeCoverageRelationStatistics Valid=3677, Invalid=15505, Unknown=0, NotChecked=0, Total=19182 [2021-05-03 17:00:31,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33922 states. [2021-05-03 17:00:31,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33922 to 14713. [2021-05-03 17:00:31,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14713 states, 14712 states have (on average 3.884448069603045) internal successors, (57148), 14712 states have internal predecessors, (57148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:00:31,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14713 states to 14713 states and 57148 transitions. [2021-05-03 17:00:31,736 INFO L78 Accepts]: Start accepts. Automaton has 14713 states and 57148 transitions. Word has length 36 [2021-05-03 17:00:31,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:00:31,736 INFO L480 AbstractCegarLoop]: Abstraction has 14713 states and 57148 transitions. [2021-05-03 17:00:31,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:00:31,736 INFO L276 IsEmpty]: Start isEmpty. Operand 14713 states and 57148 transitions. [2021-05-03 17:00:31,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:00:31,761 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:00:31,761 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:00:31,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:00:31,962 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:00:31,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:00:31,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1765665596, now seen corresponding path program 37 times [2021-05-03 17:00:31,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:00:31,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261972301] [2021-05-03 17:00:31,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:00:31,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:00:32,159 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:00:32,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261972301] [2021-05-03 17:00:32,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760663889] [2021-05-03 17:00:32,159 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:00:32,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:00:32,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:00:32,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:00:32,522 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:00:32,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:00:32,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-05-03 17:00:32,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091391391] [2021-05-03 17:00:32,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 17:00:32,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:00:32,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 17:00:32,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-05-03 17:00:32,523 INFO L87 Difference]: Start difference. First operand 14713 states and 57148 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:00:35,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:00:35,296 INFO L93 Difference]: Finished difference Result 31951 states and 113896 transitions. [2021-05-03 17:00:35,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-03 17:00:35,302 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:00:35,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:00:35,388 INFO L225 Difference]: With dead ends: 31951 [2021-05-03 17:00:35,388 INFO L226 Difference]: Without dead ends: 31951 [2021-05-03 17:00:35,389 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2349 ImplicationChecksByTransitivity, 1666.2ms TimeCoverageRelationStatistics Valid=1560, Invalid=5246, Unknown=0, NotChecked=0, Total=6806 [2021-05-03 17:00:35,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31951 states. [2021-05-03 17:00:35,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31951 to 14321. [2021-05-03 17:00:35,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14321 states, 14320 states have (on average 3.8514664804469274) internal successors, (55153), 14320 states have internal predecessors, (55153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:00:36,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14321 states to 14321 states and 55153 transitions. [2021-05-03 17:00:36,119 INFO L78 Accepts]: Start accepts. Automaton has 14321 states and 55153 transitions. Word has length 36 [2021-05-03 17:00:36,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:00:36,119 INFO L480 AbstractCegarLoop]: Abstraction has 14321 states and 55153 transitions. [2021-05-03 17:00:36,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:00:36,119 INFO L276 IsEmpty]: Start isEmpty. Operand 14321 states and 55153 transitions. [2021-05-03 17:00:36,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:00:36,142 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:00:36,142 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:00:36,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:00:36,343 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:00:36,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:00:36,344 INFO L82 PathProgramCache]: Analyzing trace with hash -610681024, now seen corresponding path program 38 times [2021-05-03 17:00:36,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:00:36,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029299736] [2021-05-03 17:00:36,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:00:36,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:00:36,487 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:00:36,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029299736] [2021-05-03 17:00:36,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549456843] [2021-05-03 17:00:36,488 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:00:36,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:00:36,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:00:36,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:00:36,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:00:36,859 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:00:36,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:00:36,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-05-03 17:00:36,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474520713] [2021-05-03 17:00:36,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 17:00:36,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:00:36,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 17:00:36,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-05-03 17:00:36,860 INFO L87 Difference]: Start difference. First operand 14321 states and 55153 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:00:39,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:00:39,137 INFO L93 Difference]: Finished difference Result 27759 states and 99712 transitions. [2021-05-03 17:00:39,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-03 17:00:39,139 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:00:39,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:00:39,245 INFO L225 Difference]: With dead ends: 27759 [2021-05-03 17:00:39,245 INFO L226 Difference]: Without dead ends: 27759 [2021-05-03 17:00:39,245 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 1185.6ms TimeCoverageRelationStatistics Valid=763, Invalid=2777, Unknown=0, NotChecked=0, Total=3540 [2021-05-03 17:00:39,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27759 states. [2021-05-03 17:00:39,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27759 to 14534. [2021-05-03 17:00:39,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14534 states, 14533 states have (on average 3.8374045276267803) internal successors, (55769), 14533 states have internal predecessors, (55769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:00:39,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14534 states to 14534 states and 55769 transitions. [2021-05-03 17:00:39,758 INFO L78 Accepts]: Start accepts. Automaton has 14534 states and 55769 transitions. Word has length 36 [2021-05-03 17:00:39,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:00:39,758 INFO L480 AbstractCegarLoop]: Abstraction has 14534 states and 55769 transitions. [2021-05-03 17:00:39,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:00:39,759 INFO L276 IsEmpty]: Start isEmpty. Operand 14534 states and 55769 transitions. [2021-05-03 17:00:39,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:00:39,785 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:00:39,785 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:00:39,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-05-03 17:00:39,986 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:00:39,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:00:39,986 INFO L82 PathProgramCache]: Analyzing trace with hash -2146021892, now seen corresponding path program 39 times [2021-05-03 17:00:39,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:00:39,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889869057] [2021-05-03 17:00:39,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:00:39,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:00:40,143 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:00:40,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889869057] [2021-05-03 17:00:40,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929862293] [2021-05-03 17:00:40,143 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:00:40,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 17:00:40,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:00:40,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 17:00:40,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:00:40,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 17:00:40,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:00:40,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:00:40,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 17:00:40,396 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-05-03 17:00:40,484 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-05-03 17:00:40,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 17:00:40,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:00:40,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:00:40,516 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 1 xjuncts. [2021-05-03 17:00:40,516 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:37 [2021-05-03 17:00:40,767 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-05-03 17:00:40,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-05-03 17:00:40,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:00:40,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:00:40,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-05-03 17:00:40,818 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:47, output treesize:46 [2021-05-03 17:00:41,055 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-03 17:00:41,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:00:41,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-05-03 17:00:41,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60809847] [2021-05-03 17:00:41,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 17:00:41,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:00:41,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 17:00:41,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-05-03 17:00:41,056 INFO L87 Difference]: Start difference. First operand 14534 states and 55769 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:00:54,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:00:54,147 INFO L93 Difference]: Finished difference Result 30005 states and 104469 transitions. [2021-05-03 17:00:54,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2021-05-03 17:00:54,149 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:00:54,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:00:54,224 INFO L225 Difference]: With dead ends: 30005 [2021-05-03 17:00:54,224 INFO L226 Difference]: Without dead ends: 29779 [2021-05-03 17:00:54,225 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9982 ImplicationChecksByTransitivity, 7628.0ms TimeCoverageRelationStatistics Valid=3338, Invalid=23068, Unknown=0, NotChecked=0, Total=26406 [2021-05-03 17:00:54,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29779 states. [2021-05-03 17:00:54,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29779 to 16232. [2021-05-03 17:00:54,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16232 states, 16231 states have (on average 3.8969872466268254) internal successors, (63252), 16231 states have internal predecessors, (63252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:00:54,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16232 states to 16232 states and 63252 transitions. [2021-05-03 17:00:54,749 INFO L78 Accepts]: Start accepts. Automaton has 16232 states and 63252 transitions. Word has length 36 [2021-05-03 17:00:54,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:00:54,750 INFO L480 AbstractCegarLoop]: Abstraction has 16232 states and 63252 transitions. [2021-05-03 17:00:54,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:00:54,750 INFO L276 IsEmpty]: Start isEmpty. Operand 16232 states and 63252 transitions. [2021-05-03 17:00:54,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:00:54,779 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:00:54,779 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:00:54,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:00:54,980 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:00:54,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:00:54,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1242329482, now seen corresponding path program 40 times [2021-05-03 17:00:54,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:00:54,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555582820] [2021-05-03 17:00:54,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:00:54,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:00:55,084 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:00:55,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555582820] [2021-05-03 17:00:55,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043109313] [2021-05-03 17:00:55,085 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:00:55,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:00:55,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:00:55,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 17:00:55,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:00:55,490 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:00:55,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:00:55,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-05-03 17:00:55,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328387789] [2021-05-03 17:00:55,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 17:00:55,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:00:55,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 17:00:55,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-05-03 17:00:55,491 INFO L87 Difference]: Start difference. First operand 16232 states and 63252 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:01:00,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:01:00,591 INFO L93 Difference]: Finished difference Result 33064 states and 118366 transitions. [2021-05-03 17:01:00,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-05-03 17:01:00,593 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:01:00,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:01:00,677 INFO L225 Difference]: With dead ends: 33064 [2021-05-03 17:01:00,677 INFO L226 Difference]: Without dead ends: 33056 [2021-05-03 17:01:00,678 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4831 ImplicationChecksByTransitivity, 2888.8ms TimeCoverageRelationStatistics Valid=2444, Invalid=10212, Unknown=0, NotChecked=0, Total=12656 [2021-05-03 17:01:00,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33056 states. [2021-05-03 17:01:01,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33056 to 16203. [2021-05-03 17:01:01,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16203 states, 16202 states have (on average 3.897481792371312) internal successors, (63147), 16202 states have internal predecessors, (63147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:01:01,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16203 states to 16203 states and 63147 transitions. [2021-05-03 17:01:01,281 INFO L78 Accepts]: Start accepts. Automaton has 16203 states and 63147 transitions. Word has length 36 [2021-05-03 17:01:01,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:01:01,281 INFO L480 AbstractCegarLoop]: Abstraction has 16203 states and 63147 transitions. [2021-05-03 17:01:01,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:01:01,281 INFO L276 IsEmpty]: Start isEmpty. Operand 16203 states and 63147 transitions. [2021-05-03 17:01:01,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:01:01,309 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:01:01,310 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:01:01,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:01:01,521 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:01:01,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:01:01,521 INFO L82 PathProgramCache]: Analyzing trace with hash -999630980, now seen corresponding path program 41 times [2021-05-03 17:01:01,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:01:01,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013065430] [2021-05-03 17:01:01,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:01:01,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:01:01,692 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:01:01,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013065430] [2021-05-03 17:01:01,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428696327] [2021-05-03 17:01:01,693 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:01:01,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 17:01:01,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:01:01,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 17:01:01,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:01:02,181 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:01:02,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:01:02,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-05-03 17:01:02,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596692133] [2021-05-03 17:01:02,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 17:01:02,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:01:02,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 17:01:02,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-05-03 17:01:02,182 INFO L87 Difference]: Start difference. First operand 16203 states and 63147 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:01:09,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:01:09,261 INFO L93 Difference]: Finished difference Result 36385 states and 129883 transitions. [2021-05-03 17:01:09,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-05-03 17:01:09,263 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:01:09,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:01:09,405 INFO L225 Difference]: With dead ends: 36385 [2021-05-03 17:01:09,405 INFO L226 Difference]: Without dead ends: 36385 [2021-05-03 17:01:09,406 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8689 ImplicationChecksByTransitivity, 4607.0ms TimeCoverageRelationStatistics Valid=3708, Invalid=17754, Unknown=0, NotChecked=0, Total=21462 [2021-05-03 17:01:09,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36385 states. [2021-05-03 17:01:09,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36385 to 16302. [2021-05-03 17:01:09,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16302 states, 16301 states have (on average 3.903748236304521) internal successors, (63635), 16301 states have internal predecessors, (63635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:01:10,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16302 states to 16302 states and 63635 transitions. [2021-05-03 17:01:10,015 INFO L78 Accepts]: Start accepts. Automaton has 16302 states and 63635 transitions. Word has length 36 [2021-05-03 17:01:10,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:01:10,015 INFO L480 AbstractCegarLoop]: Abstraction has 16302 states and 63635 transitions. [2021-05-03 17:01:10,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:01:10,015 INFO L276 IsEmpty]: Start isEmpty. Operand 16302 states and 63635 transitions. [2021-05-03 17:01:10,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:01:10,046 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:01:10,046 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:01:10,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-05-03 17:01:10,247 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:01:10,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:01:10,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1594791238, now seen corresponding path program 42 times [2021-05-03 17:01:10,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:01:10,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928550336] [2021-05-03 17:01:10,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:01:10,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:01:10,480 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:01:10,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928550336] [2021-05-03 17:01:10,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660908321] [2021-05-03 17:01:10,480 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:01:10,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 17:01:10,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:01:10,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:01:10,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:01:10,894 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:01:10,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:01:10,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-05-03 17:01:10,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842929785] [2021-05-03 17:01:10,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 17:01:10,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:01:10,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 17:01:10,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-05-03 17:01:10,895 INFO L87 Difference]: Start difference. First operand 16302 states and 63635 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:01:13,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:01:13,086 INFO L93 Difference]: Finished difference Result 33311 states and 121916 transitions. [2021-05-03 17:01:13,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-03 17:01:13,088 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:01:13,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:01:13,170 INFO L225 Difference]: With dead ends: 33311 [2021-05-03 17:01:13,170 INFO L226 Difference]: Without dead ends: 33299 [2021-05-03 17:01:13,170 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 1251.6ms TimeCoverageRelationStatistics Valid=771, Invalid=2535, Unknown=0, NotChecked=0, Total=3306 [2021-05-03 17:01:13,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33299 states. [2021-05-03 17:01:13,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33299 to 16301. [2021-05-03 17:01:13,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16301 states, 16300 states have (on average 3.903680981595092) internal successors, (63630), 16300 states have internal predecessors, (63630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:01:13,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16301 states to 16301 states and 63630 transitions. [2021-05-03 17:01:13,873 INFO L78 Accepts]: Start accepts. Automaton has 16301 states and 63630 transitions. Word has length 36 [2021-05-03 17:01:13,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:01:13,873 INFO L480 AbstractCegarLoop]: Abstraction has 16301 states and 63630 transitions. [2021-05-03 17:01:13,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:01:13,873 INFO L276 IsEmpty]: Start isEmpty. Operand 16301 states and 63630 transitions. [2021-05-03 17:01:13,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:01:13,903 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:01:13,903 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:01:14,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-05-03 17:01:14,104 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:01:14,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:01:14,105 INFO L82 PathProgramCache]: Analyzing trace with hash 619738612, now seen corresponding path program 43 times [2021-05-03 17:01:14,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:01:14,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996879229] [2021-05-03 17:01:14,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:01:14,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:01:14,212 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:01:14,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996879229] [2021-05-03 17:01:14,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133418395] [2021-05-03 17:01:14,213 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:01:14,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:01:14,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:01:14,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:01:14,596 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:01:14,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:01:14,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-05-03 17:01:14,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142318262] [2021-05-03 17:01:14,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 17:01:14,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:01:14,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 17:01:14,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-05-03 17:01:14,598 INFO L87 Difference]: Start difference. First operand 16301 states and 63630 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:01:16,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:01:16,766 INFO L93 Difference]: Finished difference Result 30739 states and 112830 transitions. [2021-05-03 17:01:16,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-03 17:01:16,767 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:01:16,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:01:16,859 INFO L225 Difference]: With dead ends: 30739 [2021-05-03 17:01:16,859 INFO L226 Difference]: Without dead ends: 30739 [2021-05-03 17:01:16,860 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 1096.3ms TimeCoverageRelationStatistics Valid=579, Invalid=1971, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 17:01:16,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30739 states. [2021-05-03 17:01:17,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30739 to 16335. [2021-05-03 17:01:17,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16335 states, 16334 states have (on average 3.903085588343333) internal successors, (63753), 16334 states have internal predecessors, (63753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:01:17,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16335 states to 16335 states and 63753 transitions. [2021-05-03 17:01:17,518 INFO L78 Accepts]: Start accepts. Automaton has 16335 states and 63753 transitions. Word has length 36 [2021-05-03 17:01:17,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:01:17,518 INFO L480 AbstractCegarLoop]: Abstraction has 16335 states and 63753 transitions. [2021-05-03 17:01:17,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:01:17,518 INFO L276 IsEmpty]: Start isEmpty. Operand 16335 states and 63753 transitions. [2021-05-03 17:01:17,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:01:17,546 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:01:17,546 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:01:17,747 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:01:17,747 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:01:17,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:01:17,747 INFO L82 PathProgramCache]: Analyzing trace with hash 334296516, now seen corresponding path program 44 times [2021-05-03 17:01:17,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:01:17,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457438757] [2021-05-03 17:01:17,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:01:17,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:01:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:01:17,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457438757] [2021-05-03 17:01:17,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475284985] [2021-05-03 17:01:17,958 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:01:17,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:01:17,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:01:17,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:01:17,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:01:18,538 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:01:18,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:01:18,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-05-03 17:01:18,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290644643] [2021-05-03 17:01:18,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 17:01:18,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:01:18,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 17:01:18,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-05-03 17:01:18,539 INFO L87 Difference]: Start difference. First operand 16335 states and 63753 transitions. Second operand has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:01:21,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:01:21,990 INFO L93 Difference]: Finished difference Result 32336 states and 117254 transitions. [2021-05-03 17:01:21,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-03 17:01:21,992 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:01:21,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:01:22,074 INFO L225 Difference]: With dead ends: 32336 [2021-05-03 17:01:22,074 INFO L226 Difference]: Without dead ends: 32336 [2021-05-03 17:01:22,074 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1627 ImplicationChecksByTransitivity, 2095.0ms TimeCoverageRelationStatistics Valid=1128, Invalid=3984, Unknown=0, NotChecked=0, Total=5112 [2021-05-03 17:01:22,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32336 states. [2021-05-03 17:01:22,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32336 to 16047. [2021-05-03 17:01:22,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16047 states, 16046 states have (on average 3.864576841580456) internal successors, (62011), 16046 states have internal predecessors, (62011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:01:22,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16047 states to 16047 states and 62011 transitions. [2021-05-03 17:01:22,822 INFO L78 Accepts]: Start accepts. Automaton has 16047 states and 62011 transitions. Word has length 36 [2021-05-03 17:01:22,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:01:22,822 INFO L480 AbstractCegarLoop]: Abstraction has 16047 states and 62011 transitions. [2021-05-03 17:01:22,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:01:22,822 INFO L276 IsEmpty]: Start isEmpty. Operand 16047 states and 62011 transitions. [2021-05-03 17:01:22,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:01:22,852 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:01:22,852 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:01:23,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:01:23,068 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:01:23,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:01:23,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1645233024, now seen corresponding path program 45 times [2021-05-03 17:01:23,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:01:23,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271206223] [2021-05-03 17:01:23,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:01:23,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:01:23,214 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:01:23,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271206223] [2021-05-03 17:01:23,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256762399] [2021-05-03 17:01:23,215 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:01:23,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 17:01:23,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:01:23,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 17:01:23,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:01:23,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 17:01:23,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:01:23,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:01:23,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:01:23,630 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:22 [2021-05-03 17:01:23,734 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-05-03 17:01:23,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 17:01:23,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:01:23,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:01:23,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 17:01:23,763 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:34 [2021-05-03 17:01:23,983 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-05-03 17:01:23,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-05-03 17:01:23,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:01:24,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:01:24,032 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 1 xjuncts. [2021-05-03 17:01:24,032 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:49 [2021-05-03 17:01:24,407 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-03 17:01:24,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:01:24,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-05-03 17:01:24,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437452572] [2021-05-03 17:01:24,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 17:01:24,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:01:24,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 17:01:24,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-05-03 17:01:24,408 INFO L87 Difference]: Start difference. First operand 16047 states and 62011 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:01:31,067 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-05-03 17:01:34,172 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 17:01:34,580 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-05-03 17:01:36,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:01:36,223 INFO L93 Difference]: Finished difference Result 27127 states and 95126 transitions. [2021-05-03 17:01:36,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-05-03 17:01:36,228 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:01:36,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:01:36,305 INFO L225 Difference]: With dead ends: 27127 [2021-05-03 17:01:36,305 INFO L226 Difference]: Without dead ends: 27112 [2021-05-03 17:01:36,306 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5098 ImplicationChecksByTransitivity, 7221.1ms TimeCoverageRelationStatistics Valid=1942, Invalid=12578, Unknown=0, NotChecked=0, Total=14520 [2021-05-03 17:01:36,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27112 states. [2021-05-03 17:01:36,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27112 to 17257. [2021-05-03 17:01:36,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17257 states, 17256 states have (on average 3.8067918405192396) internal successors, (65690), 17256 states have internal predecessors, (65690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:01:36,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17257 states to 17257 states and 65690 transitions. [2021-05-03 17:01:36,915 INFO L78 Accepts]: Start accepts. Automaton has 17257 states and 65690 transitions. Word has length 36 [2021-05-03 17:01:36,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:01:36,916 INFO L480 AbstractCegarLoop]: Abstraction has 17257 states and 65690 transitions. [2021-05-03 17:01:36,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:01:36,916 INFO L276 IsEmpty]: Start isEmpty. Operand 17257 states and 65690 transitions. [2021-05-03 17:01:37,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:01:37,110 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:01:37,110 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:01:37,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:01:37,310 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:01:37,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:01:37,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1594356878, now seen corresponding path program 46 times [2021-05-03 17:01:37,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:01:37,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353285206] [2021-05-03 17:01:37,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:01:37,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:01:37,478 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:01:37,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353285206] [2021-05-03 17:01:37,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148208402] [2021-05-03 17:01:37,478 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:01:37,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:01:37,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:01:37,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 17:01:37,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:01:38,001 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:01:38,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:01:38,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 17:01:38,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861108705] [2021-05-03 17:01:38,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 17:01:38,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:01:38,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 17:01:38,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-05-03 17:01:38,002 INFO L87 Difference]: Start difference. First operand 17257 states and 65690 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:01:44,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:01:44,578 INFO L93 Difference]: Finished difference Result 32484 states and 115950 transitions. [2021-05-03 17:01:44,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-05-03 17:01:44,580 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:01:44,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:01:44,729 INFO L225 Difference]: With dead ends: 32484 [2021-05-03 17:01:44,730 INFO L226 Difference]: Without dead ends: 32480 [2021-05-03 17:01:44,730 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5050 ImplicationChecksByTransitivity, 4273.4ms TimeCoverageRelationStatistics Valid=2276, Invalid=11766, Unknown=0, NotChecked=0, Total=14042 [2021-05-03 17:01:44,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32480 states. [2021-05-03 17:01:45,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32480 to 16350. [2021-05-03 17:01:45,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16350 states, 16349 states have (on average 3.8502049054988072) internal successors, (62947), 16349 states have internal predecessors, (62947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:01:45,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16350 states to 16350 states and 62947 transitions. [2021-05-03 17:01:45,265 INFO L78 Accepts]: Start accepts. Automaton has 16350 states and 62947 transitions. Word has length 36 [2021-05-03 17:01:45,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:01:45,265 INFO L480 AbstractCegarLoop]: Abstraction has 16350 states and 62947 transitions. [2021-05-03 17:01:45,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:01:45,265 INFO L276 IsEmpty]: Start isEmpty. Operand 16350 states and 62947 transitions. [2021-05-03 17:01:45,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:01:45,296 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:01:45,296 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:01:45,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:01:45,501 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:01:45,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:01:45,501 INFO L82 PathProgramCache]: Analyzing trace with hash 649769798, now seen corresponding path program 37 times [2021-05-03 17:01:45,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:01:45,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759079591] [2021-05-03 17:01:45,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:01:45,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:01:45,645 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:01:45,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759079591] [2021-05-03 17:01:45,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947579729] [2021-05-03 17:01:45,645 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:01:45,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:01:45,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:01:45,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:01:46,168 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:01:46,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:01:46,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-05-03 17:01:46,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312410740] [2021-05-03 17:01:46,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 17:01:46,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:01:46,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 17:01:46,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-05-03 17:01:46,169 INFO L87 Difference]: Start difference. First operand 16350 states and 62947 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:01:49,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:01:49,801 INFO L93 Difference]: Finished difference Result 33716 states and 119533 transitions. [2021-05-03 17:01:49,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-03 17:01:49,801 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:01:49,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:01:49,897 INFO L225 Difference]: With dead ends: 33716 [2021-05-03 17:01:49,897 INFO L226 Difference]: Without dead ends: 33716 [2021-05-03 17:01:49,898 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1978 ImplicationChecksByTransitivity, 2178.1ms TimeCoverageRelationStatistics Valid=1338, Invalid=4514, Unknown=0, NotChecked=0, Total=5852 [2021-05-03 17:01:49,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33716 states. [2021-05-03 17:01:50,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33716 to 16474. [2021-05-03 17:01:50,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16474 states, 16473 states have (on average 3.843076549505251) internal successors, (63307), 16473 states have internal predecessors, (63307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:01:50,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16474 states to 16474 states and 63307 transitions. [2021-05-03 17:01:50,445 INFO L78 Accepts]: Start accepts. Automaton has 16474 states and 63307 transitions. Word has length 36 [2021-05-03 17:01:50,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:01:50,446 INFO L480 AbstractCegarLoop]: Abstraction has 16474 states and 63307 transitions. [2021-05-03 17:01:50,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:01:50,446 INFO L276 IsEmpty]: Start isEmpty. Operand 16474 states and 63307 transitions. [2021-05-03 17:01:50,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:01:50,473 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:01:50,473 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:01:50,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:01:50,674 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:01:50,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:01:50,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1914163660, now seen corresponding path program 38 times [2021-05-03 17:01:50,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:01:50,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169298620] [2021-05-03 17:01:50,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:01:50,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:01:50,826 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:01:50,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169298620] [2021-05-03 17:01:50,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634205730] [2021-05-03 17:01:50,826 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:01:50,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:01:50,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:01:50,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 17:01:50,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:01:51,382 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:01:51,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:01:51,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-05-03 17:01:51,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037874599] [2021-05-03 17:01:51,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 17:01:51,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:01:51,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 17:01:51,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-05-03 17:01:51,383 INFO L87 Difference]: Start difference. First operand 16474 states and 63307 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:01:54,152 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2021-05-03 17:01:56,526 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2021-05-03 17:02:01,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:02:01,190 INFO L93 Difference]: Finished difference Result 35669 states and 124553 transitions. [2021-05-03 17:02:01,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-05-03 17:02:01,192 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:02:01,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:02:01,276 INFO L225 Difference]: With dead ends: 35669 [2021-05-03 17:02:01,276 INFO L226 Difference]: Without dead ends: 35665 [2021-05-03 17:02:01,277 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12305 ImplicationChecksByTransitivity, 6923.9ms TimeCoverageRelationStatistics Valid=4827, Invalid=25275, Unknown=0, NotChecked=0, Total=30102 [2021-05-03 17:02:01,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35665 states. [2021-05-03 17:02:01,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35665 to 16223. [2021-05-03 17:02:01,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16223 states, 16222 states have (on average 3.7955245962273456) internal successors, (61571), 16222 states have internal predecessors, (61571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:02:01,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16223 states to 16223 states and 61571 transitions. [2021-05-03 17:02:01,795 INFO L78 Accepts]: Start accepts. Automaton has 16223 states and 61571 transitions. Word has length 36 [2021-05-03 17:02:01,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:02:01,796 INFO L480 AbstractCegarLoop]: Abstraction has 16223 states and 61571 transitions. [2021-05-03 17:02:01,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:02:01,796 INFO L276 IsEmpty]: Start isEmpty. Operand 16223 states and 61571 transitions. [2021-05-03 17:02:01,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:02:01,825 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:02:01,825 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:02:02,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-05-03 17:02:02,026 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:02:02,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:02:02,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1955379200, now seen corresponding path program 47 times [2021-05-03 17:02:02,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:02:02,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957259646] [2021-05-03 17:02:02,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:02:02,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:02:02,138 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:02:02,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957259646] [2021-05-03 17:02:02,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351150040] [2021-05-03 17:02:02,138 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:02:02,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 17:02:02,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:02:02,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:02:02,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:02:02,704 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:02:02,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:02:02,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-05-03 17:02:02,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529075870] [2021-05-03 17:02:02,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:02:02,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:02:02,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:02:02,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:02:02,705 INFO L87 Difference]: Start difference. First operand 16223 states and 61571 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:02:06,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:02:06,325 INFO L93 Difference]: Finished difference Result 39169 states and 139488 transitions. [2021-05-03 17:02:06,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-03 17:02:06,327 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:02:06,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:02:06,544 INFO L225 Difference]: With dead ends: 39169 [2021-05-03 17:02:06,545 INFO L226 Difference]: Without dead ends: 39169 [2021-05-03 17:02:06,545 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 2012.0ms TimeCoverageRelationStatistics Valid=1025, Invalid=2757, Unknown=0, NotChecked=0, Total=3782 [2021-05-03 17:02:06,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39169 states. [2021-05-03 17:02:07,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39169 to 16800. [2021-05-03 17:02:07,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16800 states, 16799 states have (on average 3.824037145068159) internal successors, (64240), 16799 states have internal predecessors, (64240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:02:07,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16800 states to 16800 states and 64240 transitions. [2021-05-03 17:02:07,184 INFO L78 Accepts]: Start accepts. Automaton has 16800 states and 64240 transitions. Word has length 36 [2021-05-03 17:02:07,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:02:07,184 INFO L480 AbstractCegarLoop]: Abstraction has 16800 states and 64240 transitions. [2021-05-03 17:02:07,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:02:07,184 INFO L276 IsEmpty]: Start isEmpty. Operand 16800 states and 64240 transitions. [2021-05-03 17:02:07,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:02:07,217 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:02:07,217 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:02:07,433 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:02:07,433 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:02:07,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:02:07,433 INFO L82 PathProgramCache]: Analyzing trace with hash 835382162, now seen corresponding path program 48 times [2021-05-03 17:02:07,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:02:07,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695901037] [2021-05-03 17:02:07,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:02:07,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:02:07,612 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:02:07,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695901037] [2021-05-03 17:02:07,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298747183] [2021-05-03 17:02:07,612 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:02:07,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 17:02:07,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:02:07,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:02:07,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:02:08,166 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:02:08,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:02:08,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-05-03 17:02:08,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940295134] [2021-05-03 17:02:08,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 17:02:08,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:02:08,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 17:02:08,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:02:08,167 INFO L87 Difference]: Start difference. First operand 16800 states and 64240 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:02:10,352 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-05-03 17:02:10,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:02:10,657 INFO L93 Difference]: Finished difference Result 33519 states and 119130 transitions. [2021-05-03 17:02:10,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-03 17:02:10,659 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:02:10,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:02:10,755 INFO L225 Difference]: With dead ends: 33519 [2021-05-03 17:02:10,755 INFO L226 Difference]: Without dead ends: 33507 [2021-05-03 17:02:10,755 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1487.6ms TimeCoverageRelationStatistics Valid=618, Invalid=1832, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 17:02:10,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33507 states. [2021-05-03 17:02:11,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33507 to 16806. [2021-05-03 17:02:11,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16806 states, 16805 states have (on average 3.823921451948825) internal successors, (64261), 16805 states have internal predecessors, (64261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:02:11,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16806 states to 16806 states and 64261 transitions. [2021-05-03 17:02:11,388 INFO L78 Accepts]: Start accepts. Automaton has 16806 states and 64261 transitions. Word has length 36 [2021-05-03 17:02:11,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:02:11,388 INFO L480 AbstractCegarLoop]: Abstraction has 16806 states and 64261 transitions. [2021-05-03 17:02:11,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:02:11,388 INFO L276 IsEmpty]: Start isEmpty. Operand 16806 states and 64261 transitions. [2021-05-03 17:02:11,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:02:11,419 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:02:11,419 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:02:11,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-05-03 17:02:11,620 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:02:11,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:02:11,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1105891854, now seen corresponding path program 49 times [2021-05-03 17:02:11,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:02:11,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410305226] [2021-05-03 17:02:11,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:02:11,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:02:11,715 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:02:11,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410305226] [2021-05-03 17:02:11,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389436634] [2021-05-03 17:02:11,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:02:11,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:02:11,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:02:11,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:02:12,272 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:02:12,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:02:12,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-05-03 17:02:12,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614684465] [2021-05-03 17:02:12,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 17:02:12,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:02:12,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 17:02:12,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:02:12,273 INFO L87 Difference]: Start difference. First operand 16806 states and 64261 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:02:14,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:02:14,906 INFO L93 Difference]: Finished difference Result 34560 states and 122013 transitions. [2021-05-03 17:02:14,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-03 17:02:14,909 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:02:14,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:02:15,008 INFO L225 Difference]: With dead ends: 34560 [2021-05-03 17:02:15,009 INFO L226 Difference]: Without dead ends: 34560 [2021-05-03 17:02:15,009 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1361.0ms TimeCoverageRelationStatistics Valid=726, Invalid=2030, Unknown=0, NotChecked=0, Total=2756 [2021-05-03 17:02:15,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34560 states. [2021-05-03 17:02:15,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34560 to 16446. [2021-05-03 17:02:15,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16446 states, 16445 states have (on average 3.80717543326239) internal successors, (62609), 16445 states have internal predecessors, (62609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:02:15,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16446 states to 16446 states and 62609 transitions. [2021-05-03 17:02:15,658 INFO L78 Accepts]: Start accepts. Automaton has 16446 states and 62609 transitions. Word has length 36 [2021-05-03 17:02:15,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:02:15,659 INFO L480 AbstractCegarLoop]: Abstraction has 16446 states and 62609 transitions. [2021-05-03 17:02:15,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:02:15,659 INFO L276 IsEmpty]: Start isEmpty. Operand 16446 states and 62609 transitions. [2021-05-03 17:02:15,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:02:15,688 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:02:15,689 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:02:15,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-05-03 17:02:15,905 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:02:15,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:02:15,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1690920040, now seen corresponding path program 50 times [2021-05-03 17:02:15,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:02:15,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002134837] [2021-05-03 17:02:15,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:02:15,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:02:16,088 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:02:16,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002134837] [2021-05-03 17:02:16,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649097096] [2021-05-03 17:02:16,089 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:02:16,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:02:16,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:02:16,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 17:02:16,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:02:16,787 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 23 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 17:02:16,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:02:16,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-05-03 17:02:16,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833651311] [2021-05-03 17:02:16,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 17:02:16,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:02:16,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 17:02:16,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-05-03 17:02:16,788 INFO L87 Difference]: Start difference. First operand 16446 states and 62609 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:02:28,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:02:28,017 INFO L93 Difference]: Finished difference Result 35901 states and 125560 transitions. [2021-05-03 17:02:28,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2021-05-03 17:02:28,020 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:02:28,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:02:28,113 INFO L225 Difference]: With dead ends: 35901 [2021-05-03 17:02:28,114 INFO L226 Difference]: Without dead ends: 35861 [2021-05-03 17:02:28,115 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12071 ImplicationChecksByTransitivity, 8145.9ms TimeCoverageRelationStatistics Valid=4498, Invalid=24914, Unknown=0, NotChecked=0, Total=29412 [2021-05-03 17:02:28,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35861 states. [2021-05-03 17:02:28,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35861 to 16426. [2021-05-03 17:02:28,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16426 states, 16425 states have (on average 3.805601217656012) internal successors, (62507), 16425 states have internal predecessors, (62507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:02:28,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16426 states to 16426 states and 62507 transitions. [2021-05-03 17:02:28,764 INFO L78 Accepts]: Start accepts. Automaton has 16426 states and 62507 transitions. Word has length 36 [2021-05-03 17:02:28,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:02:28,764 INFO L480 AbstractCegarLoop]: Abstraction has 16426 states and 62507 transitions. [2021-05-03 17:02:28,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:02:28,764 INFO L276 IsEmpty]: Start isEmpty. Operand 16426 states and 62507 transitions. [2021-05-03 17:02:28,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:02:28,797 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:02:28,797 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:02:28,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:02:28,997 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:02:28,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:02:28,998 INFO L82 PathProgramCache]: Analyzing trace with hash -645736056, now seen corresponding path program 51 times [2021-05-03 17:02:28,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:02:28,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571844580] [2021-05-03 17:02:28,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:02:29,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:02:29,164 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:02:29,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571844580] [2021-05-03 17:02:29,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32322393] [2021-05-03 17:02:29,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:02:29,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 17:02:29,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:02:29,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:02:29,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:02:29,893 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:02:29,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:02:29,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-05-03 17:02:29,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626569933] [2021-05-03 17:02:29,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 17:02:29,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:02:29,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 17:02:29,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-05-03 17:02:29,894 INFO L87 Difference]: Start difference. First operand 16426 states and 62507 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:02:34,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:02:34,436 INFO L93 Difference]: Finished difference Result 35186 states and 123603 transitions. [2021-05-03 17:02:34,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-03 17:02:34,439 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:02:34,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:02:34,537 INFO L225 Difference]: With dead ends: 35186 [2021-05-03 17:02:34,538 INFO L226 Difference]: Without dead ends: 35186 [2021-05-03 17:02:34,538 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1736 ImplicationChecksByTransitivity, 2782.9ms TimeCoverageRelationStatistics Valid=1383, Invalid=4019, Unknown=0, NotChecked=0, Total=5402 [2021-05-03 17:02:34,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35186 states. [2021-05-03 17:02:35,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35186 to 16534. [2021-05-03 17:02:35,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16534 states, 16533 states have (on average 3.8008225972297827) internal successors, (62839), 16533 states have internal predecessors, (62839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:02:35,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16534 states to 16534 states and 62839 transitions. [2021-05-03 17:02:35,145 INFO L78 Accepts]: Start accepts. Automaton has 16534 states and 62839 transitions. Word has length 36 [2021-05-03 17:02:35,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:02:35,145 INFO L480 AbstractCegarLoop]: Abstraction has 16534 states and 62839 transitions. [2021-05-03 17:02:35,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:02:35,145 INFO L276 IsEmpty]: Start isEmpty. Operand 16534 states and 62839 transitions. [2021-05-03 17:02:35,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:02:35,174 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:02:35,174 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:02:35,374 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:02:35,374 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:02:35,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:02:35,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1701113450, now seen corresponding path program 52 times [2021-05-03 17:02:35,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:02:35,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460948583] [2021-05-03 17:02:35,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:02:35,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:02:35,563 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:02:35,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460948583] [2021-05-03 17:02:35,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065414032] [2021-05-03 17:02:35,563 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:02:35,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:02:35,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:02:35,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 17:02:35,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:02:36,165 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:02:36,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:02:36,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-05-03 17:02:36,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908461110] [2021-05-03 17:02:36,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 17:02:36,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:02:36,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 17:02:36,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-05-03 17:02:36,166 INFO L87 Difference]: Start difference. First operand 16534 states and 62839 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:02:44,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:02:44,764 INFO L93 Difference]: Finished difference Result 35120 states and 123162 transitions. [2021-05-03 17:02:44,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-05-03 17:02:44,767 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:02:44,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:02:44,853 INFO L225 Difference]: With dead ends: 35120 [2021-05-03 17:02:44,854 INFO L226 Difference]: Without dead ends: 35112 [2021-05-03 17:02:44,854 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5799 ImplicationChecksByTransitivity, 5263.5ms TimeCoverageRelationStatistics Valid=2641, Invalid=12859, Unknown=0, NotChecked=0, Total=15500 [2021-05-03 17:02:44,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35112 states. [2021-05-03 17:02:45,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35112 to 16182. [2021-05-03 17:02:45,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16182 states, 16181 states have (on average 3.788950003090044) internal successors, (61309), 16181 states have internal predecessors, (61309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:02:45,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16182 states to 16182 states and 61309 transitions. [2021-05-03 17:02:45,400 INFO L78 Accepts]: Start accepts. Automaton has 16182 states and 61309 transitions. Word has length 36 [2021-05-03 17:02:45,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:02:45,400 INFO L480 AbstractCegarLoop]: Abstraction has 16182 states and 61309 transitions. [2021-05-03 17:02:45,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:02:45,401 INFO L276 IsEmpty]: Start isEmpty. Operand 16182 states and 61309 transitions. [2021-05-03 17:02:45,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:02:45,429 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:02:45,429 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:02:45,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:02:45,629 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:02:45,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:02:45,630 INFO L82 PathProgramCache]: Analyzing trace with hash -417474388, now seen corresponding path program 53 times [2021-05-03 17:02:45,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:02:45,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65045675] [2021-05-03 17:02:45,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:02:45,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:02:45,785 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:02:45,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65045675] [2021-05-03 17:02:45,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922905312] [2021-05-03 17:02:45,785 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:02:45,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-03 17:02:45,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:02:45,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:02:45,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:02:46,456 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:02:46,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:02:46,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-05-03 17:02:46,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552239777] [2021-05-03 17:02:46,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 17:02:46,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:02:46,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 17:02:46,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-05-03 17:02:46,457 INFO L87 Difference]: Start difference. First operand 16182 states and 61309 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:02:52,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:02:52,509 INFO L93 Difference]: Finished difference Result 31424 states and 110398 transitions. [2021-05-03 17:02:52,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-05-03 17:02:52,513 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:02:52,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:02:52,597 INFO L225 Difference]: With dead ends: 31424 [2021-05-03 17:02:52,597 INFO L226 Difference]: Without dead ends: 31372 [2021-05-03 17:02:52,598 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3404 ImplicationChecksByTransitivity, 3869.3ms TimeCoverageRelationStatistics Valid=1989, Invalid=7323, Unknown=0, NotChecked=0, Total=9312 [2021-05-03 17:02:52,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31372 states. [2021-05-03 17:02:53,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31372 to 17011. [2021-05-03 17:02:53,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17011 states, 17010 states have (on average 3.7483245149911815) internal successors, (63759), 17010 states have internal predecessors, (63759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:02:53,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17011 states to 17011 states and 63759 transitions. [2021-05-03 17:02:53,184 INFO L78 Accepts]: Start accepts. Automaton has 17011 states and 63759 transitions. Word has length 36 [2021-05-03 17:02:53,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:02:53,184 INFO L480 AbstractCegarLoop]: Abstraction has 17011 states and 63759 transitions. [2021-05-03 17:02:53,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:02:53,185 INFO L276 IsEmpty]: Start isEmpty. Operand 17011 states and 63759 transitions. [2021-05-03 17:02:53,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:02:53,220 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:02:53,220 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:02:53,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-05-03 17:02:53,421 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:02:53,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:02:53,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1328456694, now seen corresponding path program 54 times [2021-05-03 17:02:53,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:02:53,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569538881] [2021-05-03 17:02:53,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:02:53,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:02:53,611 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:02:53,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569538881] [2021-05-03 17:02:53,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788317660] [2021-05-03 17:02:53,612 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:02:53,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 17:02:53,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:02:53,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 17:02:53,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:02:54,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 17:02:54,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:02:54,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:02:54,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 17:02:54,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:27 [2021-05-03 17:02:54,351 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-05-03 17:02:54,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 17:02:54,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:02:54,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:02:54,391 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 1 xjuncts. [2021-05-03 17:02:54,391 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:39 [2021-05-03 17:02:54,592 INFO L354 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2021-05-03 17:02:54,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 32 [2021-05-03 17:02:54,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:02:54,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:02:54,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-05-03 17:02:54,659 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:50 [2021-05-03 17:02:55,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:02:55,086 INFO L354 Elim1Store]: treesize reduction 60, result has 15.5 percent of original size [2021-05-03 17:02:55,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 42 [2021-05-03 17:02:55,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:02:55,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:02:55,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-05-03 17:02:55,163 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:66, output treesize:65 [2021-05-03 17:02:55,952 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-03 17:02:55,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:02:55,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 24 [2021-05-03 17:02:55,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329183382] [2021-05-03 17:02:55,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 17:02:55,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:02:55,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 17:02:55,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-05-03 17:02:55,953 INFO L87 Difference]: Start difference. First operand 17011 states and 63759 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:02:58,225 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-05-03 17:02:58,849 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-05-03 17:02:59,633 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-05-03 17:02:59,873 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-05-03 17:03:00,782 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-05-03 17:03:02,514 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-05-03 17:03:05,188 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-05-03 17:03:05,739 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-03 17:03:06,745 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-05-03 17:03:07,792 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-03 17:03:08,553 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-05-03 17:03:09,089 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-05-03 17:03:10,801 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-05-03 17:03:11,225 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-05-03 17:03:11,548 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-05-03 17:03:11,852 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-05-03 17:03:12,061 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 17:03:12,422 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-05-03 17:03:12,880 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-03 17:03:13,255 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-05-03 17:03:13,546 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-05-03 17:03:14,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:14,060 INFO L93 Difference]: Finished difference Result 26494 states and 92613 transitions. [2021-05-03 17:03:14,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-05-03 17:03:14,065 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:03:14,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:14,139 INFO L225 Difference]: With dead ends: 26494 [2021-05-03 17:03:14,139 INFO L226 Difference]: Without dead ends: 26358 [2021-05-03 17:03:14,140 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5946 ImplicationChecksByTransitivity, 12638.0ms TimeCoverageRelationStatistics Valid=2000, Invalid=14256, Unknown=0, NotChecked=0, Total=16256 [2021-05-03 17:03:14,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26358 states. [2021-05-03 17:03:14,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26358 to 17294. [2021-05-03 17:03:14,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17294 states, 17293 states have (on average 3.735442086393338) internal successors, (64597), 17293 states have internal predecessors, (64597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:14,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17294 states to 17294 states and 64597 transitions. [2021-05-03 17:03:14,657 INFO L78 Accepts]: Start accepts. Automaton has 17294 states and 64597 transitions. Word has length 36 [2021-05-03 17:03:14,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:14,657 INFO L480 AbstractCegarLoop]: Abstraction has 17294 states and 64597 transitions. [2021-05-03 17:03:14,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:14,657 INFO L276 IsEmpty]: Start isEmpty. Operand 17294 states and 64597 transitions. [2021-05-03 17:03:14,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:03:14,687 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:14,687 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:14,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:14,888 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:14,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:14,888 INFO L82 PathProgramCache]: Analyzing trace with hash -757061290, now seen corresponding path program 55 times [2021-05-03 17:03:14,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:14,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181139509] [2021-05-03 17:03:14,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:14,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:15,073 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:15,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181139509] [2021-05-03 17:03:15,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327036799] [2021-05-03 17:03:15,073 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:15,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:15,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 17:03:15,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:15,831 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 17:03:15,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:15,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-05-03 17:03:15,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458633981] [2021-05-03 17:03:15,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 17:03:15,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:15,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 17:03:15,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-05-03 17:03:15,832 INFO L87 Difference]: Start difference. First operand 17294 states and 64597 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:22,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:22,772 INFO L93 Difference]: Finished difference Result 32283 states and 115167 transitions. [2021-05-03 17:03:22,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-05-03 17:03:22,779 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:03:22,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:22,867 INFO L225 Difference]: With dead ends: 32283 [2021-05-03 17:03:22,867 INFO L226 Difference]: Without dead ends: 32267 [2021-05-03 17:03:22,869 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4171 ImplicationChecksByTransitivity, 4721.7ms TimeCoverageRelationStatistics Valid=2031, Invalid=9311, Unknown=0, NotChecked=0, Total=11342 [2021-05-03 17:03:22,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32267 states. [2021-05-03 17:03:23,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32267 to 17372. [2021-05-03 17:03:23,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17372 states, 17371 states have (on average 3.7320822059754764) internal successors, (64830), 17371 states have internal predecessors, (64830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:23,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17372 states to 17372 states and 64830 transitions. [2021-05-03 17:03:23,424 INFO L78 Accepts]: Start accepts. Automaton has 17372 states and 64830 transitions. Word has length 36 [2021-05-03 17:03:23,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:23,424 INFO L480 AbstractCegarLoop]: Abstraction has 17372 states and 64830 transitions. [2021-05-03 17:03:23,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:23,424 INFO L276 IsEmpty]: Start isEmpty. Operand 17372 states and 64830 transitions. [2021-05-03 17:03:23,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:03:23,457 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:23,457 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:23,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-05-03 17:03:23,673 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:23,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:23,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1893700292, now seen corresponding path program 39 times [2021-05-03 17:03:23,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:23,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915210446] [2021-05-03 17:03:23,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:23,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:23,860 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:03:23,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915210446] [2021-05-03 17:03:23,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86781381] [2021-05-03 17:03:23,861 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:23,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 17:03:23,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:23,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:03:23,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:24,540 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:24,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:24,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 18 [2021-05-03 17:03:24,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929970819] [2021-05-03 17:03:24,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:03:24,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:24,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:03:24,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:03:24,541 INFO L87 Difference]: Start difference. First operand 17372 states and 64830 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:31,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:31,177 INFO L93 Difference]: Finished difference Result 32268 states and 114944 transitions. [2021-05-03 17:03:31,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-05-03 17:03:31,180 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:03:31,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:31,266 INFO L225 Difference]: With dead ends: 32268 [2021-05-03 17:03:31,266 INFO L226 Difference]: Without dead ends: 32240 [2021-05-03 17:03:31,268 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4232 ImplicationChecksByTransitivity, 4289.3ms TimeCoverageRelationStatistics Valid=2122, Invalid=9220, Unknown=0, NotChecked=0, Total=11342 [2021-05-03 17:03:31,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32240 states. [2021-05-03 17:03:31,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32240 to 17860. [2021-05-03 17:03:31,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17860 states, 17859 states have (on average 3.705694607760793) internal successors, (66180), 17859 states have internal predecessors, (66180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:31,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17860 states to 17860 states and 66180 transitions. [2021-05-03 17:03:31,782 INFO L78 Accepts]: Start accepts. Automaton has 17860 states and 66180 transitions. Word has length 36 [2021-05-03 17:03:31,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:31,783 INFO L480 AbstractCegarLoop]: Abstraction has 17860 states and 66180 transitions. [2021-05-03 17:03:31,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:31,783 INFO L276 IsEmpty]: Start isEmpty. Operand 17860 states and 66180 transitions. [2021-05-03 17:03:31,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:03:31,813 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:31,813 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:32,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:32,014 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:32,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:32,014 INFO L82 PathProgramCache]: Analyzing trace with hash -501007420, now seen corresponding path program 40 times [2021-05-03 17:03:32,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:32,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101776199] [2021-05-03 17:03:32,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:32,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:32,173 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:03:32,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101776199] [2021-05-03 17:03:32,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839935316] [2021-05-03 17:03:32,173 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:32,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:03:32,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:32,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:03:32,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:32,834 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:32,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:32,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-05-03 17:03:32,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610395080] [2021-05-03 17:03:32,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 17:03:32,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:32,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 17:03:32,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:03:32,835 INFO L87 Difference]: Start difference. First operand 17860 states and 66180 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:37,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:37,143 INFO L93 Difference]: Finished difference Result 31675 states and 112625 transitions. [2021-05-03 17:03:37,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-03 17:03:37,147 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:03:37,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:37,245 INFO L225 Difference]: With dead ends: 31675 [2021-05-03 17:03:37,245 INFO L226 Difference]: Without dead ends: 31675 [2021-05-03 17:03:37,246 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 2535.4ms TimeCoverageRelationStatistics Valid=939, Invalid=3093, Unknown=0, NotChecked=0, Total=4032 [2021-05-03 17:03:37,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31675 states. [2021-05-03 17:03:37,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31675 to 17736. [2021-05-03 17:03:37,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17736 states, 17735 states have (on average 3.711192557090499) internal successors, (65818), 17735 states have internal predecessors, (65818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:37,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17736 states to 17736 states and 65818 transitions. [2021-05-03 17:03:37,978 INFO L78 Accepts]: Start accepts. Automaton has 17736 states and 65818 transitions. Word has length 36 [2021-05-03 17:03:38,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:38,001 INFO L480 AbstractCegarLoop]: Abstraction has 17736 states and 65818 transitions. [2021-05-03 17:03:38,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:38,001 INFO L276 IsEmpty]: Start isEmpty. Operand 17736 states and 65818 transitions. [2021-05-03 17:03:38,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:03:38,065 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:38,065 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:38,282 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:38,282 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:38,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:38,283 INFO L82 PathProgramCache]: Analyzing trace with hash 14650632, now seen corresponding path program 56 times [2021-05-03 17:03:38,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:38,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003741061] [2021-05-03 17:03:38,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:38,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:38,525 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:38,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003741061] [2021-05-03 17:03:38,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478544975] [2021-05-03 17:03:38,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 17:03:38,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:03:38,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:38,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 17:03:38,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:39,271 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 17:03:39,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:39,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-05-03 17:03:39,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228158397] [2021-05-03 17:03:39,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 17:03:39,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:39,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 17:03:39,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-05-03 17:03:39,272 INFO L87 Difference]: Start difference. First operand 17736 states and 65818 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:49,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:49,438 INFO L93 Difference]: Finished difference Result 37470 states and 128076 transitions. [2021-05-03 17:03:49,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-05-03 17:03:49,442 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:03:49,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:49,546 INFO L225 Difference]: With dead ends: 37470 [2021-05-03 17:03:49,546 INFO L226 Difference]: Without dead ends: 37470 [2021-05-03 17:03:49,548 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7845 ImplicationChecksByTransitivity, 7184.8ms TimeCoverageRelationStatistics Valid=3923, Invalid=15259, Unknown=0, NotChecked=0, Total=19182 [2021-05-03 17:03:49,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37470 states. [2021-05-03 17:03:50,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37470 to 17361. [2021-05-03 17:03:50,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17361 states, 17360 states have (on average 3.7517857142857145) internal successors, (65131), 17360 states have internal predecessors, (65131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:50,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17361 states to 17361 states and 65131 transitions. [2021-05-03 17:03:50,195 INFO L78 Accepts]: Start accepts. Automaton has 17361 states and 65131 transitions. Word has length 36 [2021-05-03 17:03:50,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:50,195 INFO L480 AbstractCegarLoop]: Abstraction has 17361 states and 65131 transitions. [2021-05-03 17:03:50,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:50,196 INFO L276 IsEmpty]: Start isEmpty. Operand 17361 states and 65131 transitions. [2021-05-03 17:03:50,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:03:50,227 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:50,227 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:50,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-05-03 17:03:50,428 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:50,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:50,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1670020454, now seen corresponding path program 57 times [2021-05-03 17:03:50,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:50,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751521141] [2021-05-03 17:03:50,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:50,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:50,658 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:50,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751521141] [2021-05-03 17:03:50,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576221741] [2021-05-03 17:03:50,659 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:50,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-03 17:03:50,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:50,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:03:50,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:51,397 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:51,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:51,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-05-03 17:03:51,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931821587] [2021-05-03 17:03:51,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 17:03:51,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:51,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 17:03:51,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-05-03 17:03:51,398 INFO L87 Difference]: Start difference. First operand 17361 states and 65131 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:58,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:58,928 INFO L93 Difference]: Finished difference Result 34675 states and 119928 transitions. [2021-05-03 17:03:58,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-05-03 17:03:58,931 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:03:58,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:59,024 INFO L225 Difference]: With dead ends: 34675 [2021-05-03 17:03:59,025 INFO L226 Difference]: Without dead ends: 34599 [2021-05-03 17:03:59,025 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4225 ImplicationChecksByTransitivity, 5069.8ms TimeCoverageRelationStatistics Valid=2296, Invalid=8834, Unknown=0, NotChecked=0, Total=11130 [2021-05-03 17:03:59,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34599 states. [2021-05-03 17:03:59,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34599 to 16908. [2021-05-03 17:03:59,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16908 states, 16907 states have (on average 3.7340746436387295) internal successors, (63132), 16907 states have internal predecessors, (63132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:59,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16908 states to 16908 states and 63132 transitions. [2021-05-03 17:03:59,635 INFO L78 Accepts]: Start accepts. Automaton has 16908 states and 63132 transitions. Word has length 36 [2021-05-03 17:03:59,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:59,635 INFO L480 AbstractCegarLoop]: Abstraction has 16908 states and 63132 transitions. [2021-05-03 17:03:59,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:59,635 INFO L276 IsEmpty]: Start isEmpty. Operand 16908 states and 63132 transitions. [2021-05-03 17:03:59,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:03:59,665 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:59,665 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:59,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:59,866 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:59,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:59,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1988479988, now seen corresponding path program 58 times [2021-05-03 17:03:59,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:59,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735477560] [2021-05-03 17:03:59,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:59,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:00,111 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:00,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735477560] [2021-05-03 17:04:00,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633457378] [2021-05-03 17:04:00,112 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:04:00,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:04:00,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:04:00,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 17:04:00,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:00,741 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 17:04:00,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:00,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-05-03 17:04:00,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056680610] [2021-05-03 17:04:00,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:04:00,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:00,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:04:00,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:04:00,742 INFO L87 Difference]: Start difference. First operand 16908 states and 63132 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:06,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:06,885 INFO L93 Difference]: Finished difference Result 31762 states and 110839 transitions. [2021-05-03 17:04:06,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-03 17:04:06,888 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:04:06,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:06,975 INFO L225 Difference]: With dead ends: 31762 [2021-05-03 17:04:06,975 INFO L226 Difference]: Without dead ends: 31690 [2021-05-03 17:04:06,976 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2632 ImplicationChecksByTransitivity, 3659.2ms TimeCoverageRelationStatistics Valid=1504, Invalid=5978, Unknown=0, NotChecked=0, Total=7482 [2021-05-03 17:04:07,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31690 states. [2021-05-03 17:04:07,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31690 to 16908. [2021-05-03 17:04:07,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16908 states, 16907 states have (on average 3.7340746436387295) internal successors, (63132), 16907 states have internal predecessors, (63132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:07,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16908 states to 16908 states and 63132 transitions. [2021-05-03 17:04:07,500 INFO L78 Accepts]: Start accepts. Automaton has 16908 states and 63132 transitions. Word has length 36 [2021-05-03 17:04:07,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:07,500 INFO L480 AbstractCegarLoop]: Abstraction has 16908 states and 63132 transitions. [2021-05-03 17:04:07,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:07,500 INFO L276 IsEmpty]: Start isEmpty. Operand 16908 states and 63132 transitions. [2021-05-03 17:04:07,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:04:07,530 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:07,530 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:07,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:04:07,731 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:07,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:07,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1230140076, now seen corresponding path program 59 times [2021-05-03 17:04:07,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:07,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936210581] [2021-05-03 17:04:07,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:07,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:07,955 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:07,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936210581] [2021-05-03 17:04:07,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931455689] [2021-05-03 17:04:07,955 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:04:07,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 17:04:07,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:04:07,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 17:04:07,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:08,703 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 17:04:08,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:08,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-05-03 17:04:08,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554504254] [2021-05-03 17:04:08,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 17:04:08,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:08,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 17:04:08,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-05-03 17:04:08,704 INFO L87 Difference]: Start difference. First operand 16908 states and 63132 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:22,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:22,562 INFO L93 Difference]: Finished difference Result 37416 states and 126890 transitions. [2021-05-03 17:04:22,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2021-05-03 17:04:22,566 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:04:22,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:22,671 INFO L225 Difference]: With dead ends: 37416 [2021-05-03 17:04:22,671 INFO L226 Difference]: Without dead ends: 37344 [2021-05-03 17:04:22,673 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11555 ImplicationChecksByTransitivity, 10121.5ms TimeCoverageRelationStatistics Valid=4716, Invalid=23006, Unknown=0, NotChecked=0, Total=27722 [2021-05-03 17:04:22,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37344 states. [2021-05-03 17:04:23,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37344 to 16945. [2021-05-03 17:04:23,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16945 states, 16944 states have (on average 3.7370160528800755) internal successors, (63320), 16944 states have internal predecessors, (63320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:23,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16945 states to 16945 states and 63320 transitions. [2021-05-03 17:04:23,287 INFO L78 Accepts]: Start accepts. Automaton has 16945 states and 63320 transitions. Word has length 36 [2021-05-03 17:04:23,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:23,287 INFO L480 AbstractCegarLoop]: Abstraction has 16945 states and 63320 transitions. [2021-05-03 17:04:23,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:23,287 INFO L276 IsEmpty]: Start isEmpty. Operand 16945 states and 63320 transitions. [2021-05-03 17:04:23,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:04:23,318 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:23,319 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:23,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-05-03 17:04:23,519 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:23,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:23,519 INFO L82 PathProgramCache]: Analyzing trace with hash -2017838672, now seen corresponding path program 60 times [2021-05-03 17:04:23,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:23,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071472963] [2021-05-03 17:04:23,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:23,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:23,740 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:23,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071472963] [2021-05-03 17:04:23,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217064587] [2021-05-03 17:04:23,741 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:04:23,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 17:04:23,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:04:23,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 17:04:23,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:24,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 17:04:24,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:04:24,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:04:24,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:04:24,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-05-03 17:04:24,762 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-05-03 17:04:24,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-05-03 17:04:24,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:04:24,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:04:24,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 17:04:24,796 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-05-03 17:04:25,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:25,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:25,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:25,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 36 [2021-05-03 17:04:25,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:04:25,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:04:25,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 17:04:25,100 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:47 [2021-05-03 17:04:25,655 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 17:04:25,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:25,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-05-03 17:04:25,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059506267] [2021-05-03 17:04:25,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 17:04:25,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:25,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 17:04:25,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-05-03 17:04:25,656 INFO L87 Difference]: Start difference. First operand 16945 states and 63320 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:26,143 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2021-05-03 17:04:41,167 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-05-03 17:04:42,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:42,273 INFO L93 Difference]: Finished difference Result 33786 states and 113936 transitions. [2021-05-03 17:04:42,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-05-03 17:04:42,276 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:04:42,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:42,356 INFO L225 Difference]: With dead ends: 33786 [2021-05-03 17:04:42,356 INFO L226 Difference]: Without dead ends: 33559 [2021-05-03 17:04:42,358 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13670 ImplicationChecksByTransitivity, 13116.8ms TimeCoverageRelationStatistics Valid=4013, Invalid=29293, Unknown=0, NotChecked=0, Total=33306 [2021-05-03 17:04:42,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33559 states. [2021-05-03 17:04:42,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33559 to 17006. [2021-05-03 17:04:42,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17006 states, 17005 states have (on average 3.7364892678623933) internal successors, (63539), 17005 states have internal predecessors, (63539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:42,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17006 states to 17006 states and 63539 transitions. [2021-05-03 17:04:42,904 INFO L78 Accepts]: Start accepts. Automaton has 17006 states and 63539 transitions. Word has length 36 [2021-05-03 17:04:42,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:42,905 INFO L480 AbstractCegarLoop]: Abstraction has 17006 states and 63539 transitions. [2021-05-03 17:04:42,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:42,905 INFO L276 IsEmpty]: Start isEmpty. Operand 17006 states and 63539 transitions. [2021-05-03 17:04:42,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:04:42,930 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:42,930 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:43,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-05-03 17:04:43,145 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:43,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:43,145 INFO L82 PathProgramCache]: Analyzing trace with hash -545537740, now seen corresponding path program 61 times [2021-05-03 17:04:43,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:43,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788696792] [2021-05-03 17:04:43,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:43,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:43,375 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:43,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788696792] [2021-05-03 17:04:43,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255013556] [2021-05-03 17:04:43,376 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:04:43,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:43,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 17:04:43,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:44,033 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:04:44,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:44,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-05-03 17:04:44,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790888934] [2021-05-03 17:04:44,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:04:44,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:44,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:04:44,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:04:44,034 INFO L87 Difference]: Start difference. First operand 17006 states and 63539 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:52,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:52,389 INFO L93 Difference]: Finished difference Result 35615 states and 121342 transitions. [2021-05-03 17:04:52,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-05-03 17:04:52,393 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:04:52,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:52,488 INFO L225 Difference]: With dead ends: 35615 [2021-05-03 17:04:52,488 INFO L226 Difference]: Without dead ends: 35599 [2021-05-03 17:04:52,489 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5684 ImplicationChecksByTransitivity, 5723.3ms TimeCoverageRelationStatistics Valid=2727, Invalid=11315, Unknown=0, NotChecked=0, Total=14042 [2021-05-03 17:04:52,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35599 states. [2021-05-03 17:04:53,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35599 to 14776. [2021-05-03 17:04:53,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14776 states, 14775 states have (on average 3.6406768189509306) internal successors, (53791), 14775 states have internal predecessors, (53791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:53,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14776 states to 14776 states and 53791 transitions. [2021-05-03 17:04:53,080 INFO L78 Accepts]: Start accepts. Automaton has 14776 states and 53791 transitions. Word has length 36 [2021-05-03 17:04:53,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:53,080 INFO L480 AbstractCegarLoop]: Abstraction has 14776 states and 53791 transitions. [2021-05-03 17:04:53,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:53,080 INFO L276 IsEmpty]: Start isEmpty. Operand 14776 states and 53791 transitions. [2021-05-03 17:04:53,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:04:53,109 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:53,109 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:53,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-05-03 17:04:53,324 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:53,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:53,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1278156332, now seen corresponding path program 62 times [2021-05-03 17:04:53,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:53,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783347567] [2021-05-03 17:04:53,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:53,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:53,546 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:53,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783347567] [2021-05-03 17:04:53,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154499540] [2021-05-03 17:04:53,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:04:53,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:04:53,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:04:53,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 17:04:53,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:54,235 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 17:04:54,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:54,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-05-03 17:04:54,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237475119] [2021-05-03 17:04:54,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 17:04:54,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:54,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 17:04:54,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-05-03 17:04:54,236 INFO L87 Difference]: Start difference. First operand 14776 states and 53791 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:01,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:05:01,805 INFO L93 Difference]: Finished difference Result 28666 states and 99293 transitions. [2021-05-03 17:05:01,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-05-03 17:05:01,808 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:05:01,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:05:01,884 INFO L225 Difference]: With dead ends: 28666 [2021-05-03 17:05:01,884 INFO L226 Difference]: Without dead ends: 28606 [2021-05-03 17:05:01,885 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3397 ImplicationChecksByTransitivity, 4451.7ms TimeCoverageRelationStatistics Valid=1828, Invalid=7484, Unknown=0, NotChecked=0, Total=9312 [2021-05-03 17:05:01,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28606 states. [2021-05-03 17:05:02,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28606 to 15108. [2021-05-03 17:05:02,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15108 states, 15107 states have (on average 3.6251406632686836) internal successors, (54765), 15107 states have internal predecessors, (54765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:02,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15108 states to 15108 states and 54765 transitions. [2021-05-03 17:05:02,318 INFO L78 Accepts]: Start accepts. Automaton has 15108 states and 54765 transitions. Word has length 36 [2021-05-03 17:05:02,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:05:02,318 INFO L480 AbstractCegarLoop]: Abstraction has 15108 states and 54765 transitions. [2021-05-03 17:05:02,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:02,318 INFO L276 IsEmpty]: Start isEmpty. Operand 15108 states and 54765 transitions. [2021-05-03 17:05:02,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:05:02,347 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:05:02,348 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:05:02,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-05-03 17:05:02,564 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:05:02,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:05:02,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1851612882, now seen corresponding path program 63 times [2021-05-03 17:05:02,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:05:02,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313927400] [2021-05-03 17:05:02,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:05:02,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:05:02,828 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:05:02,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313927400] [2021-05-03 17:05:02,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557098947] [2021-05-03 17:05:02,828 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:05:02,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-03 17:05:02,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:05:02,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:05:02,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:05:03,710 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:05:03,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:05:03,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-05-03 17:05:03,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286632920] [2021-05-03 17:05:03,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 17:05:03,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:05:03,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 17:05:03,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-05-03 17:05:03,711 INFO L87 Difference]: Start difference. First operand 15108 states and 54765 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:09,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:05:09,305 INFO L93 Difference]: Finished difference Result 25993 states and 91048 transitions. [2021-05-03 17:05:09,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-03 17:05:09,309 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:05:09,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:05:09,377 INFO L225 Difference]: With dead ends: 25993 [2021-05-03 17:05:09,377 INFO L226 Difference]: Without dead ends: 25981 [2021-05-03 17:05:09,377 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1971 ImplicationChecksByTransitivity, 3695.0ms TimeCoverageRelationStatistics Valid=1112, Invalid=4588, Unknown=0, NotChecked=0, Total=5700 [2021-05-03 17:05:09,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25981 states. [2021-05-03 17:05:09,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25981 to 15395. [2021-05-03 17:05:09,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15395 states, 15394 states have (on average 3.624204235416396) internal successors, (55791), 15394 states have internal predecessors, (55791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:09,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15395 states to 15395 states and 55791 transitions. [2021-05-03 17:05:09,809 INFO L78 Accepts]: Start accepts. Automaton has 15395 states and 55791 transitions. Word has length 36 [2021-05-03 17:05:09,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:05:09,809 INFO L480 AbstractCegarLoop]: Abstraction has 15395 states and 55791 transitions. [2021-05-03 17:05:09,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:09,809 INFO L276 IsEmpty]: Start isEmpty. Operand 15395 states and 55791 transitions. [2021-05-03 17:05:09,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:05:09,839 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:05:09,839 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:05:10,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-05-03 17:05:10,055 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:05:10,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:05:10,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1215146028, now seen corresponding path program 64 times [2021-05-03 17:05:10,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:05:10,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144596602] [2021-05-03 17:05:10,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:05:10,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:05:10,390 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:10,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144596602] [2021-05-03 17:05:10,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570060353] [2021-05-03 17:05:10,391 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:05:10,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:05:10,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:05:10,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 17:05:10,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:05:11,230 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 17:05:11,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:05:11,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-05-03 17:05:11,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747948903] [2021-05-03 17:05:11,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 17:05:11,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:05:11,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 17:05:11,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-05-03 17:05:11,231 INFO L87 Difference]: Start difference. First operand 15395 states and 55791 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:16,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:05:16,866 INFO L93 Difference]: Finished difference Result 25873 states and 90773 transitions. [2021-05-03 17:05:16,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-05-03 17:05:16,870 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:05:16,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:05:16,936 INFO L225 Difference]: With dead ends: 25873 [2021-05-03 17:05:16,936 INFO L226 Difference]: Without dead ends: 25837 [2021-05-03 17:05:16,936 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2131 ImplicationChecksByTransitivity, 3798.3ms TimeCoverageRelationStatistics Valid=1218, Invalid=4944, Unknown=0, NotChecked=0, Total=6162 [2021-05-03 17:05:16,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25837 states. [2021-05-03 17:05:17,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25837 to 15395. [2021-05-03 17:05:17,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15395 states, 15394 states have (on average 3.623684552423022) internal successors, (55783), 15394 states have internal predecessors, (55783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:17,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15395 states to 15395 states and 55783 transitions. [2021-05-03 17:05:17,374 INFO L78 Accepts]: Start accepts. Automaton has 15395 states and 55783 transitions. Word has length 36 [2021-05-03 17:05:17,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:05:17,374 INFO L480 AbstractCegarLoop]: Abstraction has 15395 states and 55783 transitions. [2021-05-03 17:05:17,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:17,374 INFO L276 IsEmpty]: Start isEmpty. Operand 15395 states and 55783 transitions. [2021-05-03 17:05:17,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:05:17,403 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:05:17,403 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:05:17,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-05-03 17:05:17,604 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:05:17,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:05:17,604 INFO L82 PathProgramCache]: Analyzing trace with hash 853501382, now seen corresponding path program 65 times [2021-05-03 17:05:17,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:05:17,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534923584] [2021-05-03 17:05:17,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:05:17,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:05:17,821 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 17:05:17,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534923584] [2021-05-03 17:05:17,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451067006] [2021-05-03 17:05:17,821 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:05:17,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 17:05:17,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:05:17,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 17:05:17,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:05:18,747 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:05:18,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:05:18,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-05-03 17:05:18,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990958847] [2021-05-03 17:05:18,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 17:05:18,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:05:18,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 17:05:18,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-05-03 17:05:18,748 INFO L87 Difference]: Start difference. First operand 15395 states and 55783 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:22,818 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2021-05-03 17:05:28,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:05:28,644 INFO L93 Difference]: Finished difference Result 33384 states and 114382 transitions. [2021-05-03 17:05:28,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-05-03 17:05:28,648 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:05:28,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:05:28,733 INFO L225 Difference]: With dead ends: 33384 [2021-05-03 17:05:28,733 INFO L226 Difference]: Without dead ends: 33380 [2021-05-03 17:05:28,734 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4569 ImplicationChecksByTransitivity, 6514.8ms TimeCoverageRelationStatistics Valid=2345, Invalid=10087, Unknown=0, NotChecked=0, Total=12432 [2021-05-03 17:05:28,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33380 states. [2021-05-03 17:05:29,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33380 to 15788. [2021-05-03 17:05:29,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15788 states, 15787 states have (on average 3.6173433837967948) internal successors, (57107), 15787 states have internal predecessors, (57107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:29,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15788 states to 15788 states and 57107 transitions. [2021-05-03 17:05:29,243 INFO L78 Accepts]: Start accepts. Automaton has 15788 states and 57107 transitions. Word has length 36 [2021-05-03 17:05:29,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:05:29,243 INFO L480 AbstractCegarLoop]: Abstraction has 15788 states and 57107 transitions. [2021-05-03 17:05:29,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:29,243 INFO L276 IsEmpty]: Start isEmpty. Operand 15788 states and 57107 transitions. [2021-05-03 17:05:29,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:05:29,276 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:05:29,276 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:05:29,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-05-03 17:05:29,477 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:05:29,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:05:29,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1819802944, now seen corresponding path program 41 times [2021-05-03 17:05:29,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:05:29,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479014257] [2021-05-03 17:05:29,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:05:29,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:05:29,720 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 17:05:29,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479014257] [2021-05-03 17:05:29,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163849895] [2021-05-03 17:05:29,721 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:05:29,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 17:05:29,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:05:29,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:05:29,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:05:30,633 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:30,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:05:30,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-05-03 17:05:30,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471006947] [2021-05-03 17:05:30,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 17:05:30,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:05:30,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 17:05:30,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-05-03 17:05:30,634 INFO L87 Difference]: Start difference. First operand 15788 states and 57107 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:35,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:05:35,891 INFO L93 Difference]: Finished difference Result 36361 states and 126346 transitions. [2021-05-03 17:05:35,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-03 17:05:35,894 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:05:35,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:05:35,996 INFO L225 Difference]: With dead ends: 36361 [2021-05-03 17:05:35,996 INFO L226 Difference]: Without dead ends: 36361 [2021-05-03 17:05:35,997 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 3236.3ms TimeCoverageRelationStatistics Valid=957, Invalid=2583, Unknown=0, NotChecked=0, Total=3540 [2021-05-03 17:05:36,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36361 states. [2021-05-03 17:05:36,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36361 to 16736. [2021-05-03 17:05:36,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16736 states, 16735 states have (on average 3.671765760382432) internal successors, (61447), 16735 states have internal predecessors, (61447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:36,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16736 states to 16736 states and 61447 transitions. [2021-05-03 17:05:36,602 INFO L78 Accepts]: Start accepts. Automaton has 16736 states and 61447 transitions. Word has length 36 [2021-05-03 17:05:36,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:05:36,602 INFO L480 AbstractCegarLoop]: Abstraction has 16736 states and 61447 transitions. [2021-05-03 17:05:36,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:36,602 INFO L276 IsEmpty]: Start isEmpty. Operand 16736 states and 61447 transitions. [2021-05-03 17:05:36,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:05:36,633 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:05:36,634 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:05:36,850 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:05:36,850 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:05:36,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:05:36,851 INFO L82 PathProgramCache]: Analyzing trace with hash 512328654, now seen corresponding path program 42 times [2021-05-03 17:05:36,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:05:36,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126829387] [2021-05-03 17:05:36,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:05:36,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:05:37,164 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 17:05:37,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126829387] [2021-05-03 17:05:37,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946270905] [2021-05-03 17:05:37,165 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:05:37,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 17:05:37,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:05:37,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:05:37,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:05:38,178 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:38,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:05:38,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 18 [2021-05-03 17:05:38,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045493248] [2021-05-03 17:05:38,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:05:38,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:05:38,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:05:38,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:05:38,179 INFO L87 Difference]: Start difference. First operand 16736 states and 61447 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:42,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:05:42,984 INFO L93 Difference]: Finished difference Result 34371 states and 119658 transitions. [2021-05-03 17:05:42,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-03 17:05:42,989 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:05:42,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:05:43,091 INFO L225 Difference]: With dead ends: 34371 [2021-05-03 17:05:43,091 INFO L226 Difference]: Without dead ends: 34371 [2021-05-03 17:05:43,091 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 3081.8ms TimeCoverageRelationStatistics Valid=833, Invalid=2359, Unknown=0, NotChecked=0, Total=3192 [2021-05-03 17:05:43,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34371 states. [2021-05-03 17:05:43,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34371 to 16748. [2021-05-03 17:05:43,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16748 states, 16747 states have (on average 3.6716426822714516) internal successors, (61489), 16747 states have internal predecessors, (61489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:43,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16748 states to 16748 states and 61489 transitions. [2021-05-03 17:05:43,852 INFO L78 Accepts]: Start accepts. Automaton has 16748 states and 61489 transitions. Word has length 36 [2021-05-03 17:05:43,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:05:43,852 INFO L480 AbstractCegarLoop]: Abstraction has 16748 states and 61489 transitions. [2021-05-03 17:05:43,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:43,853 INFO L276 IsEmpty]: Start isEmpty. Operand 16748 states and 61489 transitions. [2021-05-03 17:05:43,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:05:43,882 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:05:43,882 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:05:44,082 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:05:44,082 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:05:44,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:05:44,082 INFO L82 PathProgramCache]: Analyzing trace with hash -2051604804, now seen corresponding path program 43 times [2021-05-03 17:05:44,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:05:44,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289876521] [2021-05-03 17:05:44,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:05:44,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:05:44,282 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 17:05:44,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289876521] [2021-05-03 17:05:44,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41790986] [2021-05-03 17:05:44,282 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:05:44,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:05:44,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 17:05:44,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:05:45,270 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:05:45,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:05:45,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-05-03 17:05:45,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223031231] [2021-05-03 17:05:45,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 17:05:45,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:05:45,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 17:05:45,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-05-03 17:05:45,271 INFO L87 Difference]: Start difference. First operand 16748 states and 61489 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:57,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:05:57,749 INFO L93 Difference]: Finished difference Result 35272 states and 121644 transitions. [2021-05-03 17:05:57,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-05-03 17:05:57,754 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:05:57,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:05:57,853 INFO L225 Difference]: With dead ends: 35272 [2021-05-03 17:05:57,853 INFO L226 Difference]: Without dead ends: 35268 [2021-05-03 17:05:57,854 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6696 ImplicationChecksByTransitivity, 8685.5ms TimeCoverageRelationStatistics Valid=3278, Invalid=13752, Unknown=0, NotChecked=0, Total=17030 [2021-05-03 17:05:57,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35268 states. [2021-05-03 17:05:58,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35268 to 16857. [2021-05-03 17:05:58,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16857 states, 16856 states have (on average 3.670799715234931) internal successors, (61875), 16856 states have internal predecessors, (61875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:58,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16857 states to 16857 states and 61875 transitions. [2021-05-03 17:05:58,410 INFO L78 Accepts]: Start accepts. Automaton has 16857 states and 61875 transitions. Word has length 36 [2021-05-03 17:05:58,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:05:58,410 INFO L480 AbstractCegarLoop]: Abstraction has 16857 states and 61875 transitions. [2021-05-03 17:05:58,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:58,410 INFO L276 IsEmpty]: Start isEmpty. Operand 16857 states and 61875 transitions. [2021-05-03 17:05:58,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:05:58,442 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:05:58,442 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:05:58,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:05:58,657 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:05:58,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:05:58,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1470279356, now seen corresponding path program 44 times [2021-05-03 17:05:58,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:05:58,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663241954] [2021-05-03 17:05:58,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:05:58,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:05:58,900 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:58,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663241954] [2021-05-03 17:05:58,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460283230] [2021-05-03 17:05:58,901 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:05:58,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:05:58,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:05:58,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 17:05:58,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:05:59,781 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 17:05:59,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:05:59,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-05-03 17:05:59,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137522522] [2021-05-03 17:05:59,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:05:59,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:05:59,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:05:59,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:05:59,782 INFO L87 Difference]: Start difference. First operand 16857 states and 61875 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:03,003 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 14 [2021-05-03 17:06:08,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:06:08,952 INFO L93 Difference]: Finished difference Result 33707 states and 117783 transitions. [2021-05-03 17:06:08,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-05-03 17:06:08,956 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:06:08,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:06:09,052 INFO L225 Difference]: With dead ends: 33707 [2021-05-03 17:06:09,052 INFO L226 Difference]: Without dead ends: 33683 [2021-05-03 17:06:09,054 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4261 ImplicationChecksByTransitivity, 6300.6ms TimeCoverageRelationStatistics Valid=2404, Invalid=9152, Unknown=0, NotChecked=0, Total=11556 [2021-05-03 17:06:09,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33683 states. [2021-05-03 17:06:09,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33683 to 16813. [2021-05-03 17:06:09,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16813 states, 16812 states have (on average 3.673507018796098) internal successors, (61759), 16812 states have internal predecessors, (61759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:09,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16813 states to 16813 states and 61759 transitions. [2021-05-03 17:06:09,698 INFO L78 Accepts]: Start accepts. Automaton has 16813 states and 61759 transitions. Word has length 36 [2021-05-03 17:06:09,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:06:09,698 INFO L480 AbstractCegarLoop]: Abstraction has 16813 states and 61759 transitions. [2021-05-03 17:06:09,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:09,698 INFO L276 IsEmpty]: Start isEmpty. Operand 16813 states and 61759 transitions. [2021-05-03 17:06:09,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:06:09,730 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:06:09,730 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:06:09,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:06:09,931 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:06:09,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:06:09,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1021111212, now seen corresponding path program 45 times [2021-05-03 17:06:09,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:06:09,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684231003] [2021-05-03 17:06:09,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:06:09,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:06:10,223 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:06:10,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684231003] [2021-05-03 17:06:10,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501375412] [2021-05-03 17:06:10,223 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:06:10,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 17:06:10,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:06:10,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:06:10,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:06:11,073 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:06:11,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:06:11,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 18 [2021-05-03 17:06:11,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204507539] [2021-05-03 17:06:11,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:06:11,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:06:11,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:06:11,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:06:11,074 INFO L87 Difference]: Start difference. First operand 16813 states and 61759 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:15,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:06:15,736 INFO L93 Difference]: Finished difference Result 30377 states and 106733 transitions. [2021-05-03 17:06:15,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-03 17:06:15,741 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:06:15,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:06:15,826 INFO L225 Difference]: With dead ends: 30377 [2021-05-03 17:06:15,826 INFO L226 Difference]: Without dead ends: 30377 [2021-05-03 17:06:15,827 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1259 ImplicationChecksByTransitivity, 3133.6ms TimeCoverageRelationStatistics Valid=984, Invalid=2798, Unknown=0, NotChecked=0, Total=3782 [2021-05-03 17:06:15,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30377 states. [2021-05-03 17:06:16,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30377 to 17605. [2021-05-03 17:06:16,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17605 states, 17604 states have (on average 3.6770620313565097) internal successors, (64731), 17604 states have internal predecessors, (64731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:16,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17605 states to 17605 states and 64731 transitions. [2021-05-03 17:06:16,550 INFO L78 Accepts]: Start accepts. Automaton has 17605 states and 64731 transitions. Word has length 36 [2021-05-03 17:06:16,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:06:16,550 INFO L480 AbstractCegarLoop]: Abstraction has 17605 states and 64731 transitions. [2021-05-03 17:06:16,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:16,551 INFO L276 IsEmpty]: Start isEmpty. Operand 17605 states and 64731 transitions. [2021-05-03 17:06:16,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:06:16,581 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:06:16,581 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:06:16,782 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-05-03 17:06:16,782 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:06:16,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:06:16,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1847708024, now seen corresponding path program 46 times [2021-05-03 17:06:16,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:06:16,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916057172] [2021-05-03 17:06:16,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:06:16,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:06:17,164 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:06:17,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916057172] [2021-05-03 17:06:17,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599475344] [2021-05-03 17:06:17,165 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:06:17,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:06:17,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:06:17,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 17:06:17,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:06:17,969 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 17:06:17,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:06:17,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-05-03 17:06:17,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249156147] [2021-05-03 17:06:17,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:06:17,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:06:17,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:06:17,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:06:17,970 INFO L87 Difference]: Start difference. First operand 17605 states and 64731 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:26,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:06:26,567 INFO L93 Difference]: Finished difference Result 32211 states and 112550 transitions. [2021-05-03 17:06:26,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-05-03 17:06:26,572 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:06:26,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:06:26,662 INFO L225 Difference]: With dead ends: 32211 [2021-05-03 17:06:26,662 INFO L226 Difference]: Without dead ends: 32171 [2021-05-03 17:06:26,663 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3888 ImplicationChecksByTransitivity, 5924.1ms TimeCoverageRelationStatistics Valid=1956, Invalid=8346, Unknown=0, NotChecked=0, Total=10302 [2021-05-03 17:06:26,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32171 states. [2021-05-03 17:06:27,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32171 to 17837. [2021-05-03 17:06:27,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17837 states, 17836 states have (on average 3.665339762278538) internal successors, (65375), 17836 states have internal predecessors, (65375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:27,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17837 states to 17837 states and 65375 transitions. [2021-05-03 17:06:27,192 INFO L78 Accepts]: Start accepts. Automaton has 17837 states and 65375 transitions. Word has length 36 [2021-05-03 17:06:27,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:06:27,192 INFO L480 AbstractCegarLoop]: Abstraction has 17837 states and 65375 transitions. [2021-05-03 17:06:27,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:27,192 INFO L276 IsEmpty]: Start isEmpty. Operand 17837 states and 65375 transitions. [2021-05-03 17:06:27,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:06:27,226 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:06:27,226 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:06:27,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-05-03 17:06:27,427 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:06:27,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:06:27,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1284231232, now seen corresponding path program 66 times [2021-05-03 17:06:27,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:06:27,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092672197] [2021-05-03 17:06:27,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:06:27,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:06:27,782 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:06:27,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092672197] [2021-05-03 17:06:27,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290331265] [2021-05-03 17:06:27,783 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:06:27,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 17:06:27,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:06:27,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 17:06:27,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:06:28,731 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 17:06:28,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:06:28,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-05-03 17:06:28,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359888943] [2021-05-03 17:06:28,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 17:06:28,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:06:28,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 17:06:28,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-05-03 17:06:28,732 INFO L87 Difference]: Start difference. First operand 17837 states and 65375 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:37,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:06:37,960 INFO L93 Difference]: Finished difference Result 32457 states and 112963 transitions. [2021-05-03 17:06:37,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-03 17:06:37,964 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:06:37,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:06:38,056 INFO L225 Difference]: With dead ends: 32457 [2021-05-03 17:06:38,056 INFO L226 Difference]: Without dead ends: 32457 [2021-05-03 17:06:38,057 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3180 ImplicationChecksByTransitivity, 5882.3ms TimeCoverageRelationStatistics Valid=2078, Invalid=6664, Unknown=0, NotChecked=0, Total=8742 [2021-05-03 17:06:38,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32457 states. [2021-05-03 17:06:38,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32457 to 17598. [2021-05-03 17:06:38,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17598 states, 17597 states have (on average 3.650792748763994) internal successors, (64243), 17597 states have internal predecessors, (64243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:38,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17598 states to 17598 states and 64243 transitions. [2021-05-03 17:06:38,672 INFO L78 Accepts]: Start accepts. Automaton has 17598 states and 64243 transitions. Word has length 36 [2021-05-03 17:06:38,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:06:38,672 INFO L480 AbstractCegarLoop]: Abstraction has 17598 states and 64243 transitions. [2021-05-03 17:06:38,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:38,672 INFO L276 IsEmpty]: Start isEmpty. Operand 17598 states and 64243 transitions. [2021-05-03 17:06:38,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:06:38,705 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:06:38,706 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:06:38,906 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-05-03 17:06:38,906 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:06:38,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:06:38,907 INFO L82 PathProgramCache]: Analyzing trace with hash -2050547776, now seen corresponding path program 67 times [2021-05-03 17:06:38,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:06:38,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805666253] [2021-05-03 17:06:38,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:06:38,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:06:39,248 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:06:39,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805666253] [2021-05-03 17:06:39,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320072497] [2021-05-03 17:06:39,249 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 17:06:39,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:06:39,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:06:39,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:06:40,241 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 17:06:40,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:06:40,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-05-03 17:06:40,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550203944] [2021-05-03 17:06:40,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 17:06:40,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:06:40,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 17:06:40,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:06:40,242 INFO L87 Difference]: Start difference. First operand 17598 states and 64243 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:43,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:06:43,035 INFO L93 Difference]: Finished difference Result 30060 states and 105966 transitions. [2021-05-03 17:06:43,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 17:06:43,035 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:06:43,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:06:43,119 INFO L225 Difference]: With dead ends: 30060 [2021-05-03 17:06:43,119 INFO L226 Difference]: Without dead ends: 30060 [2021-05-03 17:06:43,119 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1589.6ms TimeCoverageRelationStatistics Valid=287, Invalid=835, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 17:06:43,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30060 states. [2021-05-03 17:06:43,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30060 to 17521. [2021-05-03 17:06:43,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17521 states, 17520 states have (on average 3.6473173515981734) internal successors, (63901), 17520 states have internal predecessors, (63901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:44,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17521 states to 17521 states and 63901 transitions. [2021-05-03 17:06:44,023 INFO L78 Accepts]: Start accepts. Automaton has 17521 states and 63901 transitions. Word has length 36 [2021-05-03 17:06:44,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:06:44,023 INFO L480 AbstractCegarLoop]: Abstraction has 17521 states and 63901 transitions. [2021-05-03 17:06:44,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:44,023 INFO L276 IsEmpty]: Start isEmpty. Operand 17521 states and 63901 transitions. [2021-05-03 17:06:44,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:06:44,105 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:06:44,105 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:06:44,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-05-03 17:06:44,306 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:06:44,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:06:44,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1497961976, now seen corresponding path program 68 times [2021-05-03 17:06:44,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:06:44,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426429051] [2021-05-03 17:06:44,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:06:44,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:06:44,582 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:06:44,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426429051] [2021-05-03 17:06:44,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145298770] [2021-05-03 17:06:44,582 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:06:44,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:06:44,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:06:44,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:06:44,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:06:45,543 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 17:06:45,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:06:45,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-05-03 17:06:45,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321633273] [2021-05-03 17:06:45,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:06:45,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:06:45,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:06:45,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:06:45,544 INFO L87 Difference]: Start difference. First operand 17521 states and 63901 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:49,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:06:49,363 INFO L93 Difference]: Finished difference Result 32427 states and 113320 transitions. [2021-05-03 17:06:49,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 17:06:49,368 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:06:49,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:06:49,464 INFO L225 Difference]: With dead ends: 32427 [2021-05-03 17:06:49,465 INFO L226 Difference]: Without dead ends: 32427 [2021-05-03 17:06:49,465 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 2279.2ms TimeCoverageRelationStatistics Valid=500, Invalid=1570, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 17:06:49,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32427 states. [2021-05-03 17:06:50,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32427 to 16968. [2021-05-03 17:06:50,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16968 states, 16967 states have (on average 3.6244474568279603) internal successors, (61496), 16967 states have internal predecessors, (61496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:50,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16968 states to 16968 states and 61496 transitions. [2021-05-03 17:06:50,221 INFO L78 Accepts]: Start accepts. Automaton has 16968 states and 61496 transitions. Word has length 36 [2021-05-03 17:06:50,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:06:50,221 INFO L480 AbstractCegarLoop]: Abstraction has 16968 states and 61496 transitions. [2021-05-03 17:06:50,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:50,221 INFO L276 IsEmpty]: Start isEmpty. Operand 16968 states and 61496 transitions. [2021-05-03 17:06:50,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:06:50,257 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:06:50,257 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:06:50,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:06:50,458 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:06:50,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:06:50,458 INFO L82 PathProgramCache]: Analyzing trace with hash 281583822, now seen corresponding path program 69 times [2021-05-03 17:06:50,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:06:50,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721979342] [2021-05-03 17:06:50,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:06:50,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:06:50,722 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:06:50,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721979342] [2021-05-03 17:06:50,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273312699] [2021-05-03 17:06:50,722 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:06:50,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 17:06:50,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:06:50,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:06:50,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:06:51,390 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 17:06:51,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:06:51,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-05-03 17:06:51,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661977645] [2021-05-03 17:06:51,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 17:06:51,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:06:51,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 17:06:51,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:06:51,391 INFO L87 Difference]: Start difference. First operand 16968 states and 61496 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:54,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:06:54,132 INFO L93 Difference]: Finished difference Result 28758 states and 100390 transitions. [2021-05-03 17:06:54,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 17:06:54,137 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:06:54,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:06:54,223 INFO L225 Difference]: With dead ends: 28758 [2021-05-03 17:06:54,223 INFO L226 Difference]: Without dead ends: 28758 [2021-05-03 17:06:54,224 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1619.5ms TimeCoverageRelationStatistics Valid=312, Invalid=878, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 17:06:54,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28758 states. [2021-05-03 17:06:54,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28758 to 16976. [2021-05-03 17:06:54,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16976 states, 16975 states have (on average 3.6240353460972017) internal successors, (61518), 16975 states have internal predecessors, (61518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:54,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16976 states to 16976 states and 61518 transitions. [2021-05-03 17:06:54,817 INFO L78 Accepts]: Start accepts. Automaton has 16976 states and 61518 transitions. Word has length 36 [2021-05-03 17:06:54,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:06:54,817 INFO L480 AbstractCegarLoop]: Abstraction has 16976 states and 61518 transitions. [2021-05-03 17:06:54,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:54,817 INFO L276 IsEmpty]: Start isEmpty. Operand 16976 states and 61518 transitions. [2021-05-03 17:06:54,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:06:54,850 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:06:54,851 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:06:55,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-05-03 17:06:55,051 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:06:55,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:06:55,051 INFO L82 PathProgramCache]: Analyzing trace with hash 2012617660, now seen corresponding path program 70 times [2021-05-03 17:06:55,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:06:55,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567026818] [2021-05-03 17:06:55,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:06:55,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:06:55,382 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:06:55,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567026818] [2021-05-03 17:06:55,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50158821] [2021-05-03 17:06:55,383 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:06:55,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:06:55,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:06:55,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 17:06:55,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:06:56,365 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 17:06:56,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:06:56,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-03 17:06:56,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108298027] [2021-05-03 17:06:56,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:06:56,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:06:56,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:06:56,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:06:56,366 INFO L87 Difference]: Start difference. First operand 16976 states and 61518 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:04,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:07:04,630 INFO L93 Difference]: Finished difference Result 30403 states and 103450 transitions. [2021-05-03 17:07:04,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-03 17:07:04,634 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:07:04,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:07:04,698 INFO L225 Difference]: With dead ends: 30403 [2021-05-03 17:07:04,698 INFO L226 Difference]: Without dead ends: 30395 [2021-05-03 17:07:04,698 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2864 ImplicationChecksByTransitivity, 5513.1ms TimeCoverageRelationStatistics Valid=1623, Invalid=6387, Unknown=0, NotChecked=0, Total=8010 [2021-05-03 17:07:04,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30395 states. [2021-05-03 17:07:05,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30395 to 17056. [2021-05-03 17:07:05,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17056 states, 17055 states have (on average 3.6026385224274406) internal successors, (61443), 17055 states have internal predecessors, (61443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:05,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17056 states to 17056 states and 61443 transitions. [2021-05-03 17:07:05,275 INFO L78 Accepts]: Start accepts. Automaton has 17056 states and 61443 transitions. Word has length 36 [2021-05-03 17:07:05,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:07:05,275 INFO L480 AbstractCegarLoop]: Abstraction has 17056 states and 61443 transitions. [2021-05-03 17:07:05,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:05,276 INFO L276 IsEmpty]: Start isEmpty. Operand 17056 states and 61443 transitions. [2021-05-03 17:07:05,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:07:05,306 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:07:05,306 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:07:05,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:07:05,507 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:07:05,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:07:05,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1239534524, now seen corresponding path program 71 times [2021-05-03 17:07:05,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:07:05,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096662551] [2021-05-03 17:07:05,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:07:05,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:07:05,798 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:07:05,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096662551] [2021-05-03 17:07:05,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077762459] [2021-05-03 17:07:05,798 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:07:05,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 17:07:05,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:07:05,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:07:05,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:07:06,545 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 17:07:06,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:07:06,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2021-05-03 17:07:06,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697570578] [2021-05-03 17:07:06,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 17:07:06,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:07:06,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 17:07:06,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-05-03 17:07:06,546 INFO L87 Difference]: Start difference. First operand 17056 states and 61443 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:10,547 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-05-03 17:07:11,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:07:11,369 INFO L93 Difference]: Finished difference Result 30660 states and 104376 transitions. [2021-05-03 17:07:11,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-03 17:07:11,374 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:07:11,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:07:11,461 INFO L225 Difference]: With dead ends: 30660 [2021-05-03 17:07:11,461 INFO L226 Difference]: Without dead ends: 30628 [2021-05-03 17:07:11,462 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 3252.1ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-05-03 17:07:11,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30628 states. [2021-05-03 17:07:11,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30628 to 17468. [2021-05-03 17:07:11,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17468 states, 17467 states have (on average 3.577488979217954) internal successors, (62488), 17467 states have internal predecessors, (62488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:11,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17468 states to 17468 states and 62488 transitions. [2021-05-03 17:07:11,991 INFO L78 Accepts]: Start accepts. Automaton has 17468 states and 62488 transitions. Word has length 36 [2021-05-03 17:07:11,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:07:11,991 INFO L480 AbstractCegarLoop]: Abstraction has 17468 states and 62488 transitions. [2021-05-03 17:07:11,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:11,991 INFO L276 IsEmpty]: Start isEmpty. Operand 17468 states and 62488 transitions. [2021-05-03 17:07:12,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:07:12,027 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:07:12,028 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:07:12,245 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-05-03 17:07:12,245 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:07:12,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:07:12,246 INFO L82 PathProgramCache]: Analyzing trace with hash 790366380, now seen corresponding path program 72 times [2021-05-03 17:07:12,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:07:12,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842474950] [2021-05-03 17:07:12,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:07:12,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:07:12,552 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:07:12,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842474950] [2021-05-03 17:07:12,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608057266] [2021-05-03 17:07:12,552 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:07:12,573 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 17:07:12,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:07:12,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 17:07:12,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:07:13,323 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 17:07:13,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:07:13,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-05-03 17:07:13,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176712033] [2021-05-03 17:07:13,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 17:07:13,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:07:13,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 17:07:13,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:07:13,324 INFO L87 Difference]: Start difference. First operand 17468 states and 62488 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:21,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:07:21,077 INFO L93 Difference]: Finished difference Result 34087 states and 113313 transitions. [2021-05-03 17:07:21,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-03 17:07:21,082 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:07:21,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:07:21,178 INFO L225 Difference]: With dead ends: 34087 [2021-05-03 17:07:21,178 INFO L226 Difference]: Without dead ends: 34087 [2021-05-03 17:07:21,179 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3295 ImplicationChecksByTransitivity, 5153.0ms TimeCoverageRelationStatistics Valid=1793, Invalid=6397, Unknown=0, NotChecked=0, Total=8190 [2021-05-03 17:07:21,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34087 states. [2021-05-03 17:07:21,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34087 to 17658. [2021-05-03 17:07:21,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17658 states, 17657 states have (on average 3.573596873761115) internal successors, (63099), 17657 states have internal predecessors, (63099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:21,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17658 states to 17658 states and 63099 transitions. [2021-05-03 17:07:21,821 INFO L78 Accepts]: Start accepts. Automaton has 17658 states and 63099 transitions. Word has length 36 [2021-05-03 17:07:21,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:07:21,821 INFO L480 AbstractCegarLoop]: Abstraction has 17658 states and 63099 transitions. [2021-05-03 17:07:21,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:21,821 INFO L276 IsEmpty]: Start isEmpty. Operand 17658 states and 63099 transitions. [2021-05-03 17:07:21,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:07:21,852 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:07:21,852 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:07:22,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-05-03 17:07:22,053 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:07:22,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:07:22,053 INFO L82 PathProgramCache]: Analyzing trace with hash -2078452856, now seen corresponding path program 73 times [2021-05-03 17:07:22,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:07:22,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413864241] [2021-05-03 17:07:22,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:07:22,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:07:22,379 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:07:22,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413864241] [2021-05-03 17:07:22,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412803375] [2021-05-03 17:07:22,380 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:07:22,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:07:22,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 17:07:22,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:07:23,118 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 17:07:23,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:07:23,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-05-03 17:07:23,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370284497] [2021-05-03 17:07:23,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 17:07:23,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:07:23,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 17:07:23,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:07:23,119 INFO L87 Difference]: Start difference. First operand 17658 states and 63099 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:28,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:07:28,645 INFO L93 Difference]: Finished difference Result 30440 states and 103806 transitions. [2021-05-03 17:07:28,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-03 17:07:28,650 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:07:28,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:07:28,737 INFO L225 Difference]: With dead ends: 30440 [2021-05-03 17:07:28,737 INFO L226 Difference]: Without dead ends: 30360 [2021-05-03 17:07:28,737 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1546 ImplicationChecksByTransitivity, 3526.5ms TimeCoverageRelationStatistics Valid=916, Invalid=3640, Unknown=0, NotChecked=0, Total=4556 [2021-05-03 17:07:28,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30360 states. [2021-05-03 17:07:29,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30360 to 16860. [2021-05-03 17:07:29,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16860 states, 16859 states have (on average 3.5827747790497657) internal successors, (60402), 16859 states have internal predecessors, (60402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:29,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16860 states to 16860 states and 60402 transitions. [2021-05-03 17:07:29,270 INFO L78 Accepts]: Start accepts. Automaton has 16860 states and 60402 transitions. Word has length 36 [2021-05-03 17:07:29,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:07:29,270 INFO L480 AbstractCegarLoop]: Abstraction has 16860 states and 60402 transitions. [2021-05-03 17:07:29,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:29,270 INFO L276 IsEmpty]: Start isEmpty. Operand 16860 states and 60402 transitions. [2021-05-03 17:07:29,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:07:29,305 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:07:29,305 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:07:29,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:07:29,506 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:07:29,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:07:29,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1434655568, now seen corresponding path program 74 times [2021-05-03 17:07:29,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:07:29,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453627445] [2021-05-03 17:07:29,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:07:29,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:07:29,895 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:29,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453627445] [2021-05-03 17:07:29,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548741587] [2021-05-03 17:07:29,895 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:07:30,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:07:30,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:07:30,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:07:30,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:07:30,825 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:30,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:07:30,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-05-03 17:07:30,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495403291] [2021-05-03 17:07:30,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 17:07:30,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:07:30,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 17:07:30,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:07:30,826 INFO L87 Difference]: Start difference. First operand 16860 states and 60402 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:35,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:07:35,642 INFO L93 Difference]: Finished difference Result 29315 states and 98983 transitions. [2021-05-03 17:07:35,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-03 17:07:35,647 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:07:35,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:07:35,740 INFO L225 Difference]: With dead ends: 29315 [2021-05-03 17:07:35,740 INFO L226 Difference]: Without dead ends: 29315 [2021-05-03 17:07:35,741 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 3277.3ms TimeCoverageRelationStatistics Valid=923, Invalid=2983, Unknown=0, NotChecked=0, Total=3906 [2021-05-03 17:07:35,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29315 states. [2021-05-03 17:07:36,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29315 to 17576. [2021-05-03 17:07:36,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17576 states, 17575 states have (on average 3.553570412517781) internal successors, (62454), 17575 states have internal predecessors, (62454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:36,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17576 states to 17576 states and 62454 transitions. [2021-05-03 17:07:36,398 INFO L78 Accepts]: Start accepts. Automaton has 17576 states and 62454 transitions. Word has length 36 [2021-05-03 17:07:36,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:07:36,398 INFO L480 AbstractCegarLoop]: Abstraction has 17576 states and 62454 transitions. [2021-05-03 17:07:36,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:36,398 INFO L276 IsEmpty]: Start isEmpty. Operand 17576 states and 62454 transitions. [2021-05-03 17:07:36,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:07:36,433 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:07:36,433 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:07:36,634 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:07:36,634 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:07:36,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:07:36,634 INFO L82 PathProgramCache]: Analyzing trace with hash 296378270, now seen corresponding path program 75 times [2021-05-03 17:07:36,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:07:36,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834511950] [2021-05-03 17:07:36,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:07:36,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:07:37,011 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:37,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834511950] [2021-05-03 17:07:37,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894331800] [2021-05-03 17:07:37,011 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:07:37,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 17:07:37,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:07:37,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:07:37,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:07:37,831 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:37,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:07:37,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-05-03 17:07:37,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146705103] [2021-05-03 17:07:37,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 17:07:37,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:07:37,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 17:07:37,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-05-03 17:07:37,832 INFO L87 Difference]: Start difference. First operand 17576 states and 62454 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:41,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:07:41,241 INFO L93 Difference]: Finished difference Result 28174 states and 96015 transitions. [2021-05-03 17:07:41,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-03 17:07:41,246 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:07:41,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:07:41,334 INFO L225 Difference]: With dead ends: 28174 [2021-05-03 17:07:41,335 INFO L226 Difference]: Without dead ends: 28158 [2021-05-03 17:07:41,335 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 2356.5ms TimeCoverageRelationStatistics Valid=507, Invalid=1749, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 17:07:41,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28158 states. [2021-05-03 17:07:41,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28158 to 17442. [2021-05-03 17:07:41,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17442 states, 17441 states have (on average 3.558798234046213) internal successors, (62069), 17441 states have internal predecessors, (62069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:42,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17442 states to 17442 states and 62069 transitions. [2021-05-03 17:07:42,054 INFO L78 Accepts]: Start accepts. Automaton has 17442 states and 62069 transitions. Word has length 36 [2021-05-03 17:07:42,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:07:42,054 INFO L480 AbstractCegarLoop]: Abstraction has 17442 states and 62069 transitions. [2021-05-03 17:07:42,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:42,054 INFO L276 IsEmpty]: Start isEmpty. Operand 17442 states and 62069 transitions. [2021-05-03 17:07:42,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:07:42,089 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:07:42,089 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:07:42,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-05-03 17:07:42,290 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:07:42,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:07:42,290 INFO L82 PathProgramCache]: Analyzing trace with hash -384155512, now seen corresponding path program 76 times [2021-05-03 17:07:42,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:07:42,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197661093] [2021-05-03 17:07:42,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:07:42,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:07:42,659 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:42,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197661093] [2021-05-03 17:07:42,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319777464] [2021-05-03 17:07:42,659 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:07:42,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:07:42,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:07:42,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 17:07:42,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:07:43,400 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 17:07:43,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:07:43,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 17 [2021-05-03 17:07:43,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686624128] [2021-05-03 17:07:43,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 17:07:43,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:07:43,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 17:07:43,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:07:43,401 INFO L87 Difference]: Start difference. First operand 17442 states and 62069 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:50,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:07:50,561 INFO L93 Difference]: Finished difference Result 30671 states and 103844 transitions. [2021-05-03 17:07:50,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-03 17:07:50,566 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:07:50,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:07:50,651 INFO L225 Difference]: With dead ends: 30671 [2021-05-03 17:07:50,652 INFO L226 Difference]: Without dead ends: 30591 [2021-05-03 17:07:50,652 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 4559.0ms TimeCoverageRelationStatistics Valid=1207, Invalid=5435, Unknown=0, NotChecked=0, Total=6642 [2021-05-03 17:07:50,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30591 states. [2021-05-03 17:07:51,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30591 to 17956. [2021-05-03 17:07:51,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17956 states, 17955 states have (on average 3.536396546922863) internal successors, (63496), 17955 states have internal predecessors, (63496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:51,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17956 states to 17956 states and 63496 transitions. [2021-05-03 17:07:51,304 INFO L78 Accepts]: Start accepts. Automaton has 17956 states and 63496 transitions. Word has length 36 [2021-05-03 17:07:51,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:07:51,305 INFO L480 AbstractCegarLoop]: Abstraction has 17956 states and 63496 transitions. [2021-05-03 17:07:51,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:51,305 INFO L276 IsEmpty]: Start isEmpty. Operand 17956 states and 63496 transitions. [2021-05-03 17:07:51,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:07:51,337 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:07:51,337 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:07:51,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:07:51,537 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:07:51,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:07:51,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1269898876, now seen corresponding path program 77 times [2021-05-03 17:07:51,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:07:51,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063567607] [2021-05-03 17:07:51,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:07:51,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:07:51,846 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:51,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063567607] [2021-05-03 17:07:51,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902607945] [2021-05-03 17:07:51,847 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:07:51,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 17:07:51,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:07:51,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 17:07:51,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:07:52,685 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:07:52,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:07:52,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-05-03 17:07:52,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798998267] [2021-05-03 17:07:52,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 17:07:52,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:07:52,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 17:07:52,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:07:52,686 INFO L87 Difference]: Start difference. First operand 17956 states and 63496 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:01,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:08:01,001 INFO L93 Difference]: Finished difference Result 33489 states and 111985 transitions. [2021-05-03 17:08:01,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-05-03 17:08:01,007 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:08:01,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:08:01,104 INFO L225 Difference]: With dead ends: 33489 [2021-05-03 17:08:01,104 INFO L226 Difference]: Without dead ends: 33489 [2021-05-03 17:08:01,105 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3731 ImplicationChecksByTransitivity, 5868.7ms TimeCoverageRelationStatistics Valid=1759, Invalid=7943, Unknown=0, NotChecked=0, Total=9702 [2021-05-03 17:08:01,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33489 states. [2021-05-03 17:08:01,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33489 to 18616. [2021-05-03 17:08:01,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18616 states, 18615 states have (on average 3.516089175396186) internal successors, (65452), 18615 states have internal predecessors, (65452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:01,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18616 states to 18616 states and 65452 transitions. [2021-05-03 17:08:01,778 INFO L78 Accepts]: Start accepts. Automaton has 18616 states and 65452 transitions. Word has length 36 [2021-05-03 17:08:01,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:08:01,778 INFO L480 AbstractCegarLoop]: Abstraction has 18616 states and 65452 transitions. [2021-05-03 17:08:01,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:01,778 INFO L276 IsEmpty]: Start isEmpty. Operand 18616 states and 65452 transitions. [2021-05-03 17:08:01,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:08:01,808 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:08:01,808 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:08:02,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-05-03 17:08:02,023 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:08:02,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:08:02,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1727119096, now seen corresponding path program 78 times [2021-05-03 17:08:02,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:08:02,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9284926] [2021-05-03 17:08:02,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:08:02,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:08:02,380 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:08:02,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9284926] [2021-05-03 17:08:02,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783128137] [2021-05-03 17:08:02,381 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:08:02,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 17:08:02,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:08:02,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:08:02,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:08:03,717 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:08:03,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:08:03,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-05-03 17:08:03,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174817736] [2021-05-03 17:08:03,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 17:08:03,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:08:03,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 17:08:03,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-05-03 17:08:03,718 INFO L87 Difference]: Start difference. First operand 18616 states and 65452 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:06,538 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 11 [2021-05-03 17:08:07,443 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-05-03 17:08:10,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:08:10,008 INFO L93 Difference]: Finished difference Result 38028 states and 127193 transitions. [2021-05-03 17:08:10,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-03 17:08:10,013 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:08:10,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:08:10,139 INFO L225 Difference]: With dead ends: 38028 [2021-05-03 17:08:10,139 INFO L226 Difference]: Without dead ends: 38028 [2021-05-03 17:08:10,139 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 4162.5ms TimeCoverageRelationStatistics Valid=751, Invalid=2441, Unknown=0, NotChecked=0, Total=3192 [2021-05-03 17:08:10,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38028 states. [2021-05-03 17:08:10,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38028 to 20478. [2021-05-03 17:08:10,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20478 states, 20477 states have (on average 3.5023196757337502) internal successors, (71717), 20477 states have internal predecessors, (71717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:10,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20478 states to 20478 states and 71717 transitions. [2021-05-03 17:08:10,924 INFO L78 Accepts]: Start accepts. Automaton has 20478 states and 71717 transitions. Word has length 36 [2021-05-03 17:08:10,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:08:10,924 INFO L480 AbstractCegarLoop]: Abstraction has 20478 states and 71717 transitions. [2021-05-03 17:08:10,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:10,925 INFO L276 IsEmpty]: Start isEmpty. Operand 20478 states and 71717 transitions. [2021-05-03 17:08:10,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:08:10,965 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:08:10,967 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:08:11,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-05-03 17:08:11,181 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:08:11,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:08:11,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1512470806, now seen corresponding path program 79 times [2021-05-03 17:08:11,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:08:11,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903509591] [2021-05-03 17:08:11,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:08:11,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:08:11,572 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:08:11,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903509591] [2021-05-03 17:08:11,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50810600] [2021-05-03 17:08:11,572 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:08:11,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:08:11,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 17:08:11,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:08:12,797 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:08:12,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:08:12,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-05-03 17:08:12,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474945152] [2021-05-03 17:08:12,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 17:08:12,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:08:12,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 17:08:12,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-05-03 17:08:12,798 INFO L87 Difference]: Start difference. First operand 20478 states and 71717 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:15,538 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2021-05-03 17:08:33,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:08:33,084 INFO L93 Difference]: Finished difference Result 41593 states and 137151 transitions. [2021-05-03 17:08:33,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2021-05-03 17:08:33,090 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:08:33,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:08:33,217 INFO L225 Difference]: With dead ends: 41593 [2021-05-03 17:08:33,217 INFO L226 Difference]: Without dead ends: 41553 [2021-05-03 17:08:33,219 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13988 ImplicationChecksByTransitivity, 15884.4ms TimeCoverageRelationStatistics Valid=5552, Invalid=26668, Unknown=0, NotChecked=0, Total=32220 [2021-05-03 17:08:33,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41553 states. [2021-05-03 17:08:33,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41553 to 20092. [2021-05-03 17:08:33,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20092 states, 20091 states have (on average 3.490219501269225) internal successors, (70122), 20091 states have internal predecessors, (70122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:34,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20092 states to 20092 states and 70122 transitions. [2021-05-03 17:08:34,019 INFO L78 Accepts]: Start accepts. Automaton has 20092 states and 70122 transitions. Word has length 36 [2021-05-03 17:08:34,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:08:34,020 INFO L480 AbstractCegarLoop]: Abstraction has 20092 states and 70122 transitions. [2021-05-03 17:08:34,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:34,020 INFO L276 IsEmpty]: Start isEmpty. Operand 20092 states and 70122 transitions. [2021-05-03 17:08:34,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:08:34,062 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:08:34,063 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:08:34,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-05-03 17:08:34,265 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:08:34,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:08:34,265 INFO L82 PathProgramCache]: Analyzing trace with hash 883177114, now seen corresponding path program 80 times [2021-05-03 17:08:34,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:08:34,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683367316] [2021-05-03 17:08:34,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:08:34,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:08:34,710 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:08:34,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683367316] [2021-05-03 17:08:34,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839080693] [2021-05-03 17:08:34,711 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:08:34,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:08:34,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:08:34,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 17:08:34,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:08:35,952 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 17:08:35,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:08:35,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-05-03 17:08:35,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875021480] [2021-05-03 17:08:35,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 17:08:35,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:08:35,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 17:08:35,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-05-03 17:08:35,962 INFO L87 Difference]: Start difference. First operand 20092 states and 70122 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:42,597 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2021-05-03 17:08:50,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:08:50,850 INFO L93 Difference]: Finished difference Result 39501 states and 130537 transitions. [2021-05-03 17:08:50,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-05-03 17:08:50,855 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:08:50,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:08:51,098 INFO L225 Difference]: With dead ends: 39501 [2021-05-03 17:08:51,099 INFO L226 Difference]: Without dead ends: 39385 [2021-05-03 17:08:51,099 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7238 ImplicationChecksByTransitivity, 10944.2ms TimeCoverageRelationStatistics Valid=3337, Invalid=13955, Unknown=0, NotChecked=0, Total=17292 [2021-05-03 17:08:51,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39385 states. [2021-05-03 17:08:51,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39385 to 20170. [2021-05-03 17:08:51,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20170 states, 20169 states have (on average 3.4880757598294414) internal successors, (70351), 20169 states have internal predecessors, (70351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:51,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20170 states to 20170 states and 70351 transitions. [2021-05-03 17:08:51,759 INFO L78 Accepts]: Start accepts. Automaton has 20170 states and 70351 transitions. Word has length 36 [2021-05-03 17:08:51,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:08:51,760 INFO L480 AbstractCegarLoop]: Abstraction has 20170 states and 70351 transitions. [2021-05-03 17:08:51,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:51,760 INFO L276 IsEmpty]: Start isEmpty. Operand 20170 states and 70351 transitions. [2021-05-03 17:08:51,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:08:51,803 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:08:51,803 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:08:52,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:08:52,017 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:08:52,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:08:52,017 INFO L82 PathProgramCache]: Analyzing trace with hash 246710260, now seen corresponding path program 81 times [2021-05-03 17:08:52,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:08:52,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843609148] [2021-05-03 17:08:52,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:08:52,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:08:52,390 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:08:52,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843609148] [2021-05-03 17:08:52,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921475835] [2021-05-03 17:08:52,391 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:08:52,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 17:08:52,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:08:52,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:08:52,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:08:53,453 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:08:53,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:08:53,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-05-03 17:08:53,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231015615] [2021-05-03 17:08:53,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 17:08:53,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:08:53,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 17:08:53,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-05-03 17:08:53,454 INFO L87 Difference]: Start difference. First operand 20170 states and 70351 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:06,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:09:06,947 INFO L93 Difference]: Finished difference Result 39351 states and 130477 transitions. [2021-05-03 17:09:06,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-05-03 17:09:06,952 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:09:06,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:09:07,102 INFO L225 Difference]: With dead ends: 39351 [2021-05-03 17:09:07,102 INFO L226 Difference]: Without dead ends: 39239 [2021-05-03 17:09:07,104 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5704 ImplicationChecksByTransitivity, 9542.7ms TimeCoverageRelationStatistics Valid=2492, Invalid=12028, Unknown=0, NotChecked=0, Total=14520 [2021-05-03 17:09:07,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39239 states. [2021-05-03 17:09:07,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39239 to 20262. [2021-05-03 17:09:07,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20262 states, 20261 states have (on average 3.4852672622279255) internal successors, (70615), 20261 states have internal predecessors, (70615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:07,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20262 states to 20262 states and 70615 transitions. [2021-05-03 17:09:07,850 INFO L78 Accepts]: Start accepts. Automaton has 20262 states and 70615 transitions. Word has length 36 [2021-05-03 17:09:07,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:09:07,850 INFO L480 AbstractCegarLoop]: Abstraction has 20262 states and 70615 transitions. [2021-05-03 17:09:07,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:07,850 INFO L276 IsEmpty]: Start isEmpty. Operand 20262 states and 70615 transitions. [2021-05-03 17:09:07,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:09:07,889 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:09:07,890 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:09:08,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-05-03 17:09:08,091 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:09:08,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:09:08,092 INFO L82 PathProgramCache]: Analyzing trace with hash -36962824, now seen corresponding path program 82 times [2021-05-03 17:09:08,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:09:08,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741085301] [2021-05-03 17:09:08,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:09:08,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:09:08,498 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:09:08,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741085301] [2021-05-03 17:09:08,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421244816] [2021-05-03 17:09:08,499 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:09:08,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:09:08,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:09:08,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 17:09:08,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:09:09,430 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 17:09:09,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:09:09,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2021-05-03 17:09:09,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286468524] [2021-05-03 17:09:09,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 17:09:09,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:09:09,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 17:09:09,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-05-03 17:09:09,432 INFO L87 Difference]: Start difference. First operand 20262 states and 70615 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:15,089 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2021-05-03 17:09:21,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:09:21,656 INFO L93 Difference]: Finished difference Result 38055 states and 126516 transitions. [2021-05-03 17:09:21,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-05-03 17:09:21,660 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:09:21,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:09:21,775 INFO L225 Difference]: With dead ends: 38055 [2021-05-03 17:09:21,775 INFO L226 Difference]: Without dead ends: 37859 [2021-05-03 17:09:21,777 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4450 ImplicationChecksByTransitivity, 8618.6ms TimeCoverageRelationStatistics Valid=2108, Invalid=9664, Unknown=0, NotChecked=0, Total=11772 [2021-05-03 17:09:21,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37859 states. [2021-05-03 17:09:22,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37859 to 21405. [2021-05-03 17:09:22,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21405 states, 21404 states have (on average 3.48878714259017) internal successors, (74674), 21404 states have internal predecessors, (74674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:22,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21405 states to 21405 states and 74674 transitions. [2021-05-03 17:09:22,633 INFO L78 Accepts]: Start accepts. Automaton has 21405 states and 74674 transitions. Word has length 36 [2021-05-03 17:09:22,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:09:22,633 INFO L480 AbstractCegarLoop]: Abstraction has 21405 states and 74674 transitions. [2021-05-03 17:09:22,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:22,633 INFO L276 IsEmpty]: Start isEmpty. Operand 21405 states and 74674 transitions. [2021-05-03 17:09:22,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:09:22,673 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:09:22,673 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:09:22,873 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-05-03 17:09:22,874 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:09:22,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:09:22,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1567865864, now seen corresponding path program 83 times [2021-05-03 17:09:22,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:09:22,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759871042] [2021-05-03 17:09:22,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:09:22,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:09:23,299 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:09:23,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759871042] [2021-05-03 17:09:23,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117176440] [2021-05-03 17:09:23,299 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 17:09:23,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 17:09:23,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:09:23,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:09:23,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:09:24,847 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:09:24,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:09:24,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-05-03 17:09:24,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105695503] [2021-05-03 17:09:24,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 17:09:24,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:09:24,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 17:09:24,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-05-03 17:09:24,848 INFO L87 Difference]: Start difference. First operand 21405 states and 74674 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:28,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:09:28,496 INFO L93 Difference]: Finished difference Result 44305 states and 150424 transitions. [2021-05-03 17:09:28,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 17:09:28,500 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:09:28,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:09:28,647 INFO L225 Difference]: With dead ends: 44305 [2021-05-03 17:09:28,647 INFO L226 Difference]: Without dead ends: 44305 [2021-05-03 17:09:28,647 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 2111.1ms TimeCoverageRelationStatistics Valid=311, Invalid=811, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 17:09:28,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44305 states. [2021-05-03 17:09:29,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44305 to 21985. [2021-05-03 17:09:29,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21985 states, 21984 states have (on average 3.5090065502183405) internal successors, (77142), 21984 states have internal predecessors, (77142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:29,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21985 states to 21985 states and 77142 transitions. [2021-05-03 17:09:29,783 INFO L78 Accepts]: Start accepts. Automaton has 21985 states and 77142 transitions. Word has length 36 [2021-05-03 17:09:29,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:09:29,783 INFO L480 AbstractCegarLoop]: Abstraction has 21985 states and 77142 transitions. [2021-05-03 17:09:29,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:29,783 INFO L276 IsEmpty]: Start isEmpty. Operand 21985 states and 77142 transitions. [2021-05-03 17:09:29,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:09:29,831 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:09:29,832 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:09:30,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:09:30,032 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:09:30,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:09:30,033 INFO L82 PathProgramCache]: Analyzing trace with hash 2045351476, now seen corresponding path program 84 times [2021-05-03 17:09:30,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:09:30,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968510876] [2021-05-03 17:09:30,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:09:30,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:09:30,449 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:09:30,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968510876] [2021-05-03 17:09:30,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228476211] [2021-05-03 17:09:30,450 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:09:30,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 17:09:30,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:09:30,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 17:09:30,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:09:31,530 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 17:09:31,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:09:31,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-05-03 17:09:31,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612640574] [2021-05-03 17:09:31,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:09:31,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:09:31,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:09:31,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:09:31,532 INFO L87 Difference]: Start difference. First operand 21985 states and 77142 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:43,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:09:43,069 INFO L93 Difference]: Finished difference Result 41550 states and 137477 transitions. [2021-05-03 17:09:43,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-05-03 17:09:43,074 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:09:43,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:09:43,311 INFO L225 Difference]: With dead ends: 41550 [2021-05-03 17:09:43,311 INFO L226 Difference]: Without dead ends: 41402 [2021-05-03 17:09:43,312 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4268 ImplicationChecksByTransitivity, 7795.2ms TimeCoverageRelationStatistics Valid=2115, Invalid=8805, Unknown=0, NotChecked=0, Total=10920 [2021-05-03 17:09:43,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41402 states. [2021-05-03 17:09:44,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41402 to 22283. [2021-05-03 17:09:44,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22283 states, 22282 states have (on average 3.4998204829009962) internal successors, (77983), 22282 states have internal predecessors, (77983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:44,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22283 states to 22283 states and 77983 transitions. [2021-05-03 17:09:44,177 INFO L78 Accepts]: Start accepts. Automaton has 22283 states and 77983 transitions. Word has length 36 [2021-05-03 17:09:44,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:09:44,177 INFO L480 AbstractCegarLoop]: Abstraction has 22283 states and 77983 transitions. [2021-05-03 17:09:44,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:44,177 INFO L276 IsEmpty]: Start isEmpty. Operand 22283 states and 77983 transitions. [2021-05-03 17:09:44,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:09:44,222 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:09:44,222 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:09:44,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:09:44,437 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:09:44,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:09:44,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1209334608, now seen corresponding path program 85 times [2021-05-03 17:09:44,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:09:44,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955978270] [2021-05-03 17:09:44,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:09:44,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:09:44,815 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:09:44,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955978270] [2021-05-03 17:09:44,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851485372] [2021-05-03 17:09:44,815 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:09:44,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:09:44,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:09:44,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:09:45,917 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:09:45,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:09:45,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-05-03 17:09:45,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497496143] [2021-05-03 17:09:45,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:09:45,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:09:45,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:09:45,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:09:45,918 INFO L87 Difference]: Start difference. First operand 22283 states and 77983 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:50,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:09:50,779 INFO L93 Difference]: Finished difference Result 39920 states and 132787 transitions. [2021-05-03 17:09:50,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-03 17:09:50,785 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:09:50,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:09:50,907 INFO L225 Difference]: With dead ends: 39920 [2021-05-03 17:09:50,908 INFO L226 Difference]: Without dead ends: 39920 [2021-05-03 17:09:50,908 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 2926.4ms TimeCoverageRelationStatistics Valid=577, Invalid=1679, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 17:09:50,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39920 states. [2021-05-03 17:09:51,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39920 to 22465. [2021-05-03 17:09:51,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22465 states, 22464 states have (on average 3.4959045584045585) internal successors, (78532), 22464 states have internal predecessors, (78532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:51,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22465 states to 22465 states and 78532 transitions. [2021-05-03 17:09:51,831 INFO L78 Accepts]: Start accepts. Automaton has 22465 states and 78532 transitions. Word has length 36 [2021-05-03 17:09:51,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:09:51,831 INFO L480 AbstractCegarLoop]: Abstraction has 22465 states and 78532 transitions. [2021-05-03 17:09:51,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:51,831 INFO L276 IsEmpty]: Start isEmpty. Operand 22465 states and 78532 transitions. [2021-05-03 17:09:51,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:09:51,878 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:09:51,878 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:09:52,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:09:52,079 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:09:52,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:09:52,079 INFO L82 PathProgramCache]: Analyzing trace with hash 18457400, now seen corresponding path program 86 times [2021-05-03 17:09:52,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:09:52,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020854417] [2021-05-03 17:09:52,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:09:52,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:09:52,535 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:09:52,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020854417] [2021-05-03 17:09:52,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112090858] [2021-05-03 17:09:52,536 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:09:52,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:09:52,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:09:52,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 17:09:52,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:09:53,477 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 17:09:53,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:09:53,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 18 [2021-05-03 17:09:53,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992588052] [2021-05-03 17:09:53,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:09:53,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:09:53,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:09:53,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:09:53,478 INFO L87 Difference]: Start difference. First operand 22465 states and 78532 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:59,131 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2021-05-03 17:10:00,804 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 11 [2021-05-03 17:10:07,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:10:07,399 INFO L93 Difference]: Finished difference Result 40540 states and 134969 transitions. [2021-05-03 17:10:07,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-05-03 17:10:07,405 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:10:07,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:10:07,546 INFO L225 Difference]: With dead ends: 40540 [2021-05-03 17:10:07,546 INFO L226 Difference]: Without dead ends: 40452 [2021-05-03 17:10:07,547 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5449 ImplicationChecksByTransitivity, 10095.6ms TimeCoverageRelationStatistics Valid=2596, Invalid=10976, Unknown=0, NotChecked=0, Total=13572 [2021-05-03 17:10:07,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40452 states. [2021-05-03 17:10:08,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40452 to 21926. [2021-05-03 17:10:08,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21926 states, 21925 states have (on average 3.5023033067274802) internal successors, (76788), 21925 states have internal predecessors, (76788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:08,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21926 states to 21926 states and 76788 transitions. [2021-05-03 17:10:08,511 INFO L78 Accepts]: Start accepts. Automaton has 21926 states and 76788 transitions. Word has length 36 [2021-05-03 17:10:08,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:10:08,511 INFO L480 AbstractCegarLoop]: Abstraction has 21926 states and 76788 transitions. [2021-05-03 17:10:08,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:08,512 INFO L276 IsEmpty]: Start isEmpty. Operand 21926 states and 76788 transitions. [2021-05-03 17:10:08,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:10:08,564 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:10:08,564 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:10:08,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-05-03 17:10:08,784 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:10:08,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:10:08,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1058738612, now seen corresponding path program 87 times [2021-05-03 17:10:08,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:10:08,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085818968] [2021-05-03 17:10:08,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:10:08,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:10:09,250 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:10:09,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085818968] [2021-05-03 17:10:09,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600750245] [2021-05-03 17:10:09,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:10:09,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 17:10:09,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:10:09,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:10:09,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:10:10,353 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:10:10,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:10:10,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2021-05-03 17:10:10,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400526489] [2021-05-03 17:10:10,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:10:10,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:10:10,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:10:10,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:10:10,354 INFO L87 Difference]: Start difference. First operand 21926 states and 76788 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:16,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:10:16,384 INFO L93 Difference]: Finished difference Result 36897 states and 124356 transitions. [2021-05-03 17:10:16,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-03 17:10:16,389 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:10:16,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:10:16,501 INFO L225 Difference]: With dead ends: 36897 [2021-05-03 17:10:16,501 INFO L226 Difference]: Without dead ends: 36897 [2021-05-03 17:10:16,501 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 3581.6ms TimeCoverageRelationStatistics Valid=676, Invalid=2080, Unknown=0, NotChecked=0, Total=2756 [2021-05-03 17:10:16,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36897 states. [2021-05-03 17:10:17,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36897 to 22142. [2021-05-03 17:10:17,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22142 states, 22141 states have (on average 3.4994806015988438) internal successors, (77482), 22141 states have internal predecessors, (77482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:17,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22142 states to 22142 states and 77482 transitions. [2021-05-03 17:10:17,355 INFO L78 Accepts]: Start accepts. Automaton has 22142 states and 77482 transitions. Word has length 36 [2021-05-03 17:10:17,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:10:17,356 INFO L480 AbstractCegarLoop]: Abstraction has 22142 states and 77482 transitions. [2021-05-03 17:10:17,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:17,356 INFO L276 IsEmpty]: Start isEmpty. Operand 22142 states and 77482 transitions. [2021-05-03 17:10:17,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:10:17,412 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:10:17,416 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:10:17,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-05-03 17:10:17,617 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:10:17,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:10:17,618 INFO L82 PathProgramCache]: Analyzing trace with hash 2057609742, now seen corresponding path program 88 times [2021-05-03 17:10:17,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:10:17,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576073714] [2021-05-03 17:10:17,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:10:17,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:10:18,006 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:10:18,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576073714] [2021-05-03 17:10:18,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529920438] [2021-05-03 17:10:18,006 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:10:18,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:10:18,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:10:18,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 17:10:18,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:10:19,414 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 17:10:19,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:10:19,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-05-03 17:10:19,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147535270] [2021-05-03 17:10:19,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 17:10:19,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:10:19,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 17:10:19,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-05-03 17:10:19,415 INFO L87 Difference]: Start difference. First operand 22142 states and 77482 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:24,623 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2021-05-03 17:10:29,552 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-05-03 17:10:30,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:10:30,592 INFO L93 Difference]: Finished difference Result 36897 states and 124743 transitions. [2021-05-03 17:10:30,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-03 17:10:30,597 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 17:10:30,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:10:30,724 INFO L225 Difference]: With dead ends: 36897 [2021-05-03 17:10:30,725 INFO L226 Difference]: Without dead ends: 36841 [2021-05-03 17:10:30,725 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2958 ImplicationChecksByTransitivity, 7338.3ms TimeCoverageRelationStatistics Valid=1863, Invalid=6327, Unknown=0, NotChecked=0, Total=8190 [2021-05-03 17:10:30,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36841 states. [2021-05-03 17:10:31,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36841 to 21909. [2021-05-03 17:10:31,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21909 states, 21908 states have (on average 3.4994066094577323) internal successors, (76665), 21908 states have internal predecessors, (76665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:31,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21909 states to 21909 states and 76665 transitions. [2021-05-03 17:10:31,532 INFO L78 Accepts]: Start accepts. Automaton has 21909 states and 76665 transitions. Word has length 36 [2021-05-03 17:10:31,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:10:31,532 INFO L480 AbstractCegarLoop]: Abstraction has 21909 states and 76665 transitions. [2021-05-03 17:10:31,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:31,532 INFO L276 IsEmpty]: Start isEmpty. Operand 21909 states and 76665 transitions. [2021-05-03 17:10:31,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 17:10:31,575 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:10:31,575 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:10:31,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-05-03 17:10:31,776 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:10:31,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:10:31,776 INFO L82 PathProgramCache]: Analyzing trace with hash 30795628, now seen corresponding path program 89 times [2021-05-03 17:10:31,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:10:31,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101372205] [2021-05-03 17:10:31,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:10:31,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:10:32,169 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:10:32,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101372205] [2021-05-03 17:10:32,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271668413] [2021-05-03 17:10:32,170 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:10:32,195 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 17:10:32,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:10:32,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 17:10:32,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:10:33,180 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:10:33,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:10:33,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-05-03 17:10:33,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106363170] [2021-05-03 17:10:33,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 17:10:33,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:10:33,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 17:10:33,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:10:33,182 INFO L87 Difference]: Start difference. First operand 21909 states and 76665 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-05-03 17:10:43,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-03 17:10:44,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-05-03 17:10:44,002 WARN L545 AbstractCegarLoop]: Verification canceled [2021-05-03 17:10:44,007 WARN L224 ceAbstractionStarter]: Timeout [2021-05-03 17:10:44,007 INFO L202 PluginConnector]: Adding new model parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 05:10:44 BasicIcfg [2021-05-03 17:10:44,008 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 17:10:44,008 INFO L168 Benchmark]: Toolchain (without parser) took 866054.09 ms. Allocated memory was 320.9 MB in the beginning and 3.3 GB in the end (delta: 2.9 GB). Free memory was 301.0 MB in the beginning and 1.9 GB in the end (delta: -1.6 GB). Peak memory consumption was 1.4 GB. Max. memory is 16.0 GB. [2021-05-03 17:10:44,008 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.17 ms. Allocated memory is still 320.9 MB. Free memory was 302.2 MB in the beginning and 302.1 MB in the end (delta: 76.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 17:10:44,008 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.92 ms. Allocated memory is still 320.9 MB. Free memory was 301.0 MB in the beginning and 299.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 17:10:44,008 INFO L168 Benchmark]: Boogie Preprocessor took 14.87 ms. Allocated memory is still 320.9 MB. Free memory was 299.5 MB in the beginning and 298.5 MB in the end (delta: 999.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 17:10:44,009 INFO L168 Benchmark]: RCFGBuilder took 405.75 ms. Allocated memory is still 320.9 MB. Free memory was 298.5 MB in the beginning and 285.7 MB in the end (delta: 12.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. [2021-05-03 17:10:44,009 INFO L168 Benchmark]: TraceAbstraction took 865553.22 ms. Allocated memory was 320.9 MB in the beginning and 3.3 GB in the end (delta: 2.9 GB). Free memory was 285.2 MB in the beginning and 1.9 GB in the end (delta: -1.6 GB). Peak memory consumption was 1.3 GB. Max. memory is 16.0 GB. [2021-05-03 17:10:44,009 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 0.17 ms. Allocated memory is still 320.9 MB. Free memory was 302.2 MB in the beginning and 302.1 MB in the end (delta: 76.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.92 ms. Allocated memory is still 320.9 MB. Free memory was 301.0 MB in the beginning and 299.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.87 ms. Allocated memory is still 320.9 MB. Free memory was 299.5 MB in the beginning and 298.5 MB in the end (delta: 999.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 405.75 ms. Allocated memory is still 320.9 MB. Free memory was 298.5 MB in the beginning and 285.7 MB in the end (delta: 12.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. * TraceAbstraction took 865553.22 ms. Allocated memory was 320.9 MB in the beginning and 3.3 GB in the end (delta: 2.9 GB). Free memory was 285.2 MB in the beginning and 1.9 GB in the end (delta: -1.6 GB). Peak memory consumption was 1.3 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 67]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 67). Cancelled while BasicCegarLoop was constructing difference of abstraction (21909states) and FLOYD_HOARE automaton (currently 85 states, 17 states before enhancement),while ReachableStatesComputation was computing reachable states (32065 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 865446.5ms, OverallIterations: 137, TraceHistogramMax: 5, EmptinessCheckTime: 2842.1ms, AutomataDifference: 672374.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 22.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 9059 SDtfs, 71592 SDslu, 90280 SDs, 0 SdLazy, 119591 SolverSat, 12100 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 102683.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13725 GetRequests, 3647 SyntacticMatches, 53 SemanticMatches, 10025 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342934 ImplicationChecksByTransitivity, 456653.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=22465occurred in iteration=133, InterpolantAutomatonStates: 9336, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 48972.9ms AutomataMinimizationTime, 136 MinimizatonAttempts, 1279391 StatesRemovedByMinimization, 135 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 497.3ms SsaConstructionTime, 1732.5ms SatisfiabilityAnalysisTime, 108237.6ms InterpolantComputationTime, 8914 NumberOfCodeBlocks, 8894 NumberOfCodeBlocksAsserted, 576 NumberOfCheckSat, 8642 ConstructedInterpolants, 261 QuantifiedInterpolants, 69139 SizeOfPredicates, 509 NumberOfNonLiveVariables, 9372 ConjunctsInSsa, 1538 ConjunctsInUnsatCore, 272 InterpolantComputations, 2 PerfectInterpolantSequences, 2317/5837 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown